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2023-08-28Merge tag 'v6.6-vfs.fchmodat2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs Pull fchmodat2 system call from Christian Brauner: "This adds the fchmodat2() system call. It is a revised version of the fchmodat() system call, adding a missing flag argument. Support for both AT_SYMLINK_NOFOLLOW and AT_EMPTY_PATH are included. Adding this system call revision has been a longstanding request but so far has always fallen through the cracks. While the kernel implementation of fchmodat() does not have a flag argument the libc provided POSIX-compliant fchmodat(3) version does. Both glibc and musl have to implement a workaround in order to support AT_SYMLINK_NOFOLLOW (see [1] and [2]). The workaround is brittle because it relies not just on O_PATH and O_NOFOLLOW semantics and procfs magic links but also on our rather inconsistent symlink semantics. This gives userspace a proper fchmodat2() system call that libcs can use to properly implement fchmodat(3) and allows them to get rid of their hacks. In this case it will immediately benefit them as the current workaround is already defunct because of aformentioned inconsistencies. In addition to AT_SYMLINK_NOFOLLOW, give userspace the ability to use AT_EMPTY_PATH with fchmodat2(). This is already possible with fchownat() so there's no reason to not also support it for fchmodat2(). The implementation is simple and comes with selftests. Implementation of the system call and wiring up the system call are done as separate patches even though they could arguably be one patch. But in case there are merge conflicts from other system call additions it can be beneficial to have separate patches" Link: https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/unix/sysv/linux/fchmodat.c;h=17eca54051ee28ba1ec3f9aed170a62630959143;hb=a492b1e5ef7ab50c6fdd4e4e9879ea5569ab0a6c#l35 [1] Link: https://git.musl-libc.org/cgit/musl/tree/src/stat/fchmodat.c?id=718f363bc2067b6487900eddc9180c84e7739f80#n28 [2] * tag 'v6.6-vfs.fchmodat2' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: selftests: fchmodat2: remove duplicate unneeded defines fchmodat2: add support for AT_EMPTY_PATH selftests: Add fchmodat2 selftest arch: Register fchmodat2, usually as syscall 452 fs: Add fchmodat2() Non-functional cleanup of a "__user * filename"
2023-08-24mm: rationalise flush_icache_pages() and flush_icache_page()Matthew Wilcox (Oracle)
Move the default (no-op) implementation of flush_icache_pages() to <linux/cacheflush.h> from <asm-generic/cacheflush.h>. Remove the flush_icache_page() wrapper from each architecture into <linux/cacheflush.h>. Link: https://lkml.kernel.org/r/20230802151406.3735276-32-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-08-24sh: implement the new page table range APIMatthew Wilcox (Oracle)
Add PFN_PTE_SHIFT, update_mmu_cache_range(), flush_dcache_folio() and flush_icache_pages(). Change the PG_dcache_clean flag from being per-page to per-folio. Flush the entire folio containing the pages in flush_icache_pages() for ease of implementation. Link: https://lkml.kernel.org/r/20230802151406.3735276-25-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Acked-by: Mike Rapoport (IBM) <rppt@kernel.org> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Rich Felker <dalias@libc.org> Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-08-24BackMerge tag 'v6.5-rc7' into drm-nextDave Airlie
Linux 6.5-rc7 This is needed for the CI stuff and the msm pull has fixes in it. Signed-off-by: Dave Airlie <airlied@redhat.com>
2023-08-21treewide: drop CONFIG_EMBEDDEDRandy Dunlap
There is only one Kconfig user of CONFIG_EMBEDDED and it can be switched to EXPERT or "if !ARCH_MULTIPLATFORM" (suggested by Arnd). Link: https://lkml.kernel.org/r/20230816055010.31534-1-rdunlap@infradead.org Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Palmer Dabbelt <palmer@rivosinc.com> [RISC-V] Acked-by: Greg Ungerer <gerg@linux-m68k.org> Acked-by: Jason A. Donenfeld <Jason@zx2c4.com> Acked-by: Michael Ellerman <mpe@ellerman.id.au> [powerpc] Cc: Russell King <linux@armlinux.org.uk> Cc: Vineet Gupta <vgupta@kernel.org> Cc: Brian Cain <bcain@quicinc.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Dinh Nguyen <dinguyen@kernel.org> Cc: Jonas Bonn <jonas@southpole.se> Cc: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi> Cc: Stafford Horne <shorne@gmail.com> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Rich Felker <dalias@libc.org> Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Josh Triplett <josh@joshtriplett.org> Cc: Masahiro Yamada <masahiroy@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-08-21sh: convert pte_free_tlb() to use ptdescsVishal Moola (Oracle)
Part of the conversions to replace pgtable constructor/destructors with ptdesc equivalents. Also cleans up some spacing issues. Link: https://lkml.kernel.org/r/20230807230513.102486-28-vishal.moola@gmail.com Signed-off-by: Vishal Moola (Oracle) <vishal.moola@gmail.com> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Acked-by: Mike Rapoport (IBM) <rppt@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Claudio Imbrenda <imbrenda@linux.ibm.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: David Hildenbrand <david@redhat.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Dinh Nguyen <dinguyen@kernel.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Guo Ren <guoren@kernel.org> Cc: Huacai Chen <chenhuacai@kernel.org> Cc: Hugh Dickins <hughd@google.com> Cc: Jonas Bonn <jonas@southpole.se> Cc: Matthew Wilcox <willy@infradead.org> Cc: Palmer Dabbelt <palmer@rivosinc.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Richard Weinberger <richard@nod.at> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-08-18sh/kexec: refactor for kernel/Kconfig.kexecEric DeVolder
The kexec and crash kernel options are provided in the common kernel/Kconfig.kexec. Utilize the common options and provide the ARCH_SUPPORTS_ and ARCH_SELECTS_ entries to recreate the equivalent set of KEXEC and CRASH options. Link: https://lkml.kernel.org/r/20230712161545.87870-14-eric.devolder@oracle.com Signed-off-by: Eric DeVolder <eric.devolder@oracle.com> Acked-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-08-18sh: mm: convert to GENERIC_IOREMAPBaoquan He
By taking GENERIC_IOREMAP method, the generic generic_ioremap_prot(), generic_iounmap(), and their generic wrapper ioremap_prot(), ioremap() and iounmap() are all visible and available to arch. Arch needs to provide wrapper functions to override the generic versions if there's arch specific handling in its ioremap_prot(), ioremap() or iounmap(). This change will simplify implementation by removing duplicated code with generic_ioremap_prot() and generic_iounmap(), and has the equivalent functioality as before. Here, add wrapper functions ioremap_prot() and iounmap() for SuperH's special operation when ioremap() and iounmap(). Link: https://lkml.kernel.org/r/20230706154520.11257-13-bhe@redhat.com Signed-off-by: Baoquan He <bhe@redhat.com> Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Rich Felker <dalias@libc.org> Cc: Alexander Gordeev <agordeev@linux.ibm.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Brian Cain <bcain@quicinc.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Christian Borntraeger <borntraeger@linux.ibm.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Christoph Hellwig <hch@lst.de> Cc: Chris Zankel <chris@zankel.net> Cc: David Laight <David.Laight@ACULAB.COM> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Helge Deller <deller@gmx.de> Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com> Cc: Jonas Bonn <jonas@southpole.se> Cc: Kefeng Wang <wangkefeng.wang@huawei.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Mike Rapoport (IBM) <rppt@kernel.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Niklas Schnelle <schnelle@linux.ibm.com> Cc: Stafford Horne <shorne@gmail.com> Cc: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi> Cc: Sven Schnelle <svens@linux.ibm.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Vineet Gupta <vgupta@kernel.org> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-08-18sh: add <asm-generic/io.h> includingBaoquan He
In <asm-generic/io.h>, it provides a generic implementation of all I/O accessors. For some port|mm io functions, SuperH has its own implementation in arch/sh/kernel/iomap.c and arch/sh/include/asm/io_noioport.h. These will conflict with those in <asm-generic/io.h> and cause compiling error. Hence add macro definitions to ensure that the SuperH version of them will override the generic version. [arnd@arndb.de: fix asm-generic/io.h inclusion] Link: https://lkml.kernel.org/r/20230802141658.2064864-1-arnd@kernel.org Link: https://lkml.kernel.org/r/20230706154520.11257-12-bhe@redhat.com Signed-off-by: Baoquan He <bhe@redhat.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Rich Felker <dalias@libc.org> Cc: Alexander Gordeev <agordeev@linux.ibm.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Brian Cain <bcain@quicinc.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Christian Borntraeger <borntraeger@linux.ibm.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Christoph Hellwig <hch@lst.de> Cc: Chris Zankel <chris@zankel.net> Cc: David Laight <David.Laight@ACULAB.COM> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Helge Deller <deller@gmx.de> Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com> Cc: Jonas Bonn <jonas@southpole.se> Cc: Kefeng Wang <wangkefeng.wang@huawei.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Mike Rapoport (IBM) <rppt@kernel.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Niklas Schnelle <schnelle@linux.ibm.com> Cc: Stafford Horne <shorne@gmail.com> Cc: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi> Cc: Sven Schnelle <svens@linux.ibm.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Vineet Gupta <vgupta@kernel.org> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-07-29arch/*/configs/*defconfig: Replace AUTOFS4_FS by AUTOFS_FSSven Joachim
Commit a2225d931f75 ("autofs: remove left-over autofs4 stubs") promised the removal of the fs/autofs/Kconfig fragment for AUTOFS4_FS within a couple of releases, but five years later this still has not happened yet, and AUTOFS4_FS is still enabled in 63 defconfigs. Get rid of it mechanically: git grep -l CONFIG_AUTOFS4_FS -- '*defconfig' | xargs sed -i 's/AUTOFS4_FS/AUTOFS_FS/' Also just remove the AUTOFS4_FS config option stub. Anybody who hasn't regenerated their config file in the last five years will need to just get the new name right when they do. Signed-off-by: Sven Joachim <svenjoac@gmx.de> Acked-by: Ian Kent <raven@themaw.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2023-07-27arch: Register fchmodat2, usually as syscall 452Palmer Dabbelt
This registers the new fchmodat2 syscall in most places as nuber 452, with alpha being the exception where it's 562. I found all these sites by grepping for fspick, which I assume has found me everything. Signed-off-by: Palmer Dabbelt <palmer@sifive.com> Signed-off-by: Alexey Gladkov <legion@kernel.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Message-Id: <a677d521f048e4ca439e7080a5328f21eb8e960e.1689092120.git.legion@kernel.org> Signed-off-by: Christian Brauner <brauner@kernel.org>
2023-07-24sh: mach-sh7763rdp: Assign FB_MODE_IS_UNKNOWN to struct fb_videomode.flagThomas Zimmermann
Assign FB_MODE_IS_UNKNOWN to sh7763fb_videomode.flag instead of FBINFO_FLAG_DEFAULT. Both are 0, so the stored value does not change. FBINFO_FLAG_DEFAULT is a flag for a framebuffer in struct fb_info. Flags for videomodes are prefixed with FB_MODE_. v3: * include board name in commit message (Adrian) v2: * assign FB_MODE_IS_UNKNOWN (Adrian) Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Acked-by: Sam Ravnborg <sam@ravnborg.org> Acked-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Rich Felker <dalias@libc.org> Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://patchwork.freedesktop.org/patch/msgid/20230715185343.7193-9-tzimmermann@suse.de
2023-07-17Merge tag 'drm-misc-next-2023-07-13' of ↵Daniel Vetter
git://anongit.freedesktop.org/drm/drm-misc into drm-next drm-misc-next for v6.6: UAPI Changes: * fbdev: * Make fbdev userspace interfaces optional; only leaves the framebuffer console active * prime: * Support dma-buf self-import for all drivers automatically: improves support for many userspace compositors Cross-subsystem Changes: * backlight: * Fix interaction with fbdev in several drivers * base: Convert struct platform.remove to return void; part of a larger, tree-wide effort * dma-buf: Acquire reservation lock for mmap() in exporters; part of an on-going effort to simplify locking around dma-bufs * fbdev: * Use Linux device instead of fbdev device in many places * Use deferred-I/O helper macros in various drivers * i2c: Convert struct i2c from .probe_new to .probe; part of a larger, tree-wide effort * video: * Avoid including <linux/screen_info.h> Core Changes: * atomic: * Improve logging * prime: * Remove struct drm_driver.gem_prime_mmap plus driver updates: all drivers now implement this callback with drm_gem_prime_mmap() * gem: * Support execution contexts: provides locking over multiple GEM objects * ttm: * Support init_on_free * Swapout fixes Driver Changes: * accel: * ivpu: MMU updates; Support debugfs * ast: * Improve device-model detection * Cleanups * bridge: * dw-hdmi: Improve support for YUV420 bus format * dw-mipi-dsi: Fix enable/disable of DSI controller * lt9611uxc: Use MODULE_FIRMWARE() * ps8640: Remove broken EDID code * samsung-dsim: Fix command transfer * tc358764: Handle HS/VS polarity; Use BIT() macro; Various cleanups * Cleanups * ingenic: * Kconfig REGMAP fixes * loongson: * Support display controller * mgag200: * Minor fixes * mxsfb: * Support disabling overlay planes * nouveau: * Improve VRAM detection * Various fixes and cleanups * panel: * panel-edp: Support AUO B116XAB01.4 * Support Visionox R66451 plus DT bindings * Cleanups * ssd130x: * Support per-controller default resolution plus DT bindings * Reduce memory-allocation overhead * Cleanups * tidss: * Support TI AM625 plus DT bindings * Implement new connector model plus driver updates * vkms * Improve write-back support * Documentation fixes Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> From: Thomas Zimmermann <tzimmermann@suse.de> Link: https://patchwork.freedesktop.org/patch/msgid/20230713090830.GA23281@linux-uq9g
2023-07-13Merge tag 'sh-for-v6.5-tag2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/glaubitz/sh-linux Pull sh fixes from John Paul Adrian Glaubitz: "The sh updates introduced multiple regressions. In particular, the change a8ac2961148e ("sh: Avoid using IRQ0 on SH3 and SH4") causes several boards to hang during boot due to incorrect IRQ numbers. Geert Uytterhoeven has contributed patches that handle the virq offset in the IRQ code for the dreamcast, highlander and r2d boards while Artur Rojek has contributed a patch which handles the virq offset for the hd64461 companion chip" * tag 'sh-for-v6.5-tag2' of git://git.kernel.org/pub/scm/linux/kernel/git/glaubitz/sh-linux: sh: hd64461: Handle virq offset for offchip IRQ base and HD64461 IRQ sh: mach-dreamcast: Handle virq offset in cascaded IRQ demux sh: mach-highlander: Handle virq offset in cascaded IRL demux sh: mach-r2d: Handle virq offset in cascaded IRL demux
2023-07-13sh: hd64461: Handle virq offset for offchip IRQ base and HD64461 IRQArtur Rojek
A recent change to start counting SuperH IRQ #s from 16 breaks support for the Hitachi HD64461 companion chip. Move the offchip IRQ base and HD64461 IRQ # by 16 in order to accommodate for the new virq numbering rules. Fixes: a8ac2961148e ("sh: Avoid using IRQ0 on SH3 and SH4") Signed-off-by: Artur Rojek <contact@artur-rojek.eu> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/20230710233132.69734-1-contact@artur-rojek.eu Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2023-07-13sh: mach-dreamcast: Handle virq offset in cascaded IRQ demuxGeert Uytterhoeven
Take into account the virq offset when translating cascaded interrupts. Fixes: a8ac2961148e8c72 ("sh: Avoid using IRQ0 on SH3 and SH4") Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/7d0cb246c9f1cd24bb1f637ec5cb67e799a4c3b8.1688908227.git.geert+renesas@glider.be Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2023-07-13sh: mach-highlander: Handle virq offset in cascaded IRL demuxGeert Uytterhoeven
Take into account the virq offset when translating cascaded IRL interrupts. Fixes: a8ac2961148e8c72 ("sh: Avoid using IRQ0 on SH3 and SH4") Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/4fcb0d08a2b372431c41e04312742dc9e41e1be4.1688908186.git.geert+renesas@glider.be Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2023-07-13sh: mach-r2d: Handle virq offset in cascaded IRL demuxGeert Uytterhoeven
When booting rts7751r2dplus_defconfig on QEMU, the system hangs due to an interrupt storm on IRQ 20. IRQ 20 aka event 0x280 is a cascaded IRL interrupt, which maps to IRQ_VOYAGER, the interrupt used by the Silicon Motion SM501 multimedia companion chip. As rts7751r2d_irq_demux() does not take into account the new virq offset, the interrupt is no longer translated, leading to an unhandled interrupt. Fix this by taking into account the virq offset when translating cascaded IRL interrupts. Fixes: a8ac2961148e8c72 ("sh: Avoid using IRQ0 on SH3 and SH4") Reported-by: Guenter Roeck <linux@roeck-us.net> Closes: https://lore.kernel.org/r/fbfea3ad-d327-4ad5-ac9c-648c7ca3fe1f@roeck-us.net Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Tested-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Tested-by: Guenter Roeck <linux@roeck-us.net> Link: https://lore.kernel.org/r/2c99d5df41c40691f6c407b7b6a040d406bc81ac.1688901306.git.geert+renesas@glider.be Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2023-07-11mm: Rename arch pte_mkwrite()'s to pte_mkwrite_novma()Rick Edgecombe
The x86 Shadow stack feature includes a new type of memory called shadow stack. This shadow stack memory has some unusual properties, which requires some core mm changes to function properly. One of these unusual properties is that shadow stack memory is writable, but only in limited ways. These limits are applied via a specific PTE bit combination. Nevertheless, the memory is writable, and core mm code will need to apply the writable permissions in the typical paths that call pte_mkwrite(). The goal is to make pte_mkwrite() take a VMA, so that the x86 implementation of it can know whether to create regular writable or shadow stack mappings. But there are a couple of challenges to this. Modifying the signatures of each arch pte_mkwrite() implementation would be error prone because some are generated with macros and would need to be re-implemented. Also, some pte_mkwrite() callers operate on kernel memory without a VMA. So this can be done in a three step process. First pte_mkwrite() can be renamed to pte_mkwrite_novma() in each arch, with a generic pte_mkwrite() added that just calls pte_mkwrite_novma(). Next callers without a VMA can be moved to pte_mkwrite_novma(). And lastly, pte_mkwrite() and all callers can be changed to take/pass a VMA. Start the process by renaming pte_mkwrite() to pte_mkwrite_novma() and adding the pte_mkwrite() wrapper in linux/pgtable.h. Apply the same pattern for pmd_mkwrite(). Since not all archs have a pmd_mkwrite_novma(), create a new arch config HAS_HUGE_PAGE that can be used to tell if pmd_mkwrite() should be defined. Otherwise in the !HAS_HUGE_PAGE cases the compiler would not be able to find pmd_mkwrite_novma(). No functional change. Suggested-by: Linus Torvalds <torvalds@linuxfoundation.org> Signed-off-by: Rick Edgecombe <rick.p.edgecombe@intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Mike Rapoport (IBM) <rppt@kernel.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: David Hildenbrand <david@redhat.com> Link: https://lore.kernel.org/lkml/CAHk-=wiZjSu7c9sFYZb3q04108stgHff2wfbokGCCgW7riz+8Q@mail.gmail.com/ Link: https://lore.kernel.org/all/20230613001108.3040476-2-rick.p.edgecombe%40intel.com
2023-07-05Merge tag 'sh-for-v6.5-tag1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/glaubitz/sh-linux Pull sh updates from Adrian Glaubitz: "Fix a compiler warning in the J2 probing code and a fix by Sergey Shtylyov to avoid using IRQ0 on SH3 and SH4 targets. Masahiro Yamada made some clean-up in the build system to address reports by the 0day bot. The most notable changes come from Artur Rojek who addressed a number of issues in the DMA code, in particular a fix for the DMA channel offset calculation that was introduced in in 7f47c7189b3e ("sh: dma: More legacy cpu dma chainsawing.") in 2012! Together with another change to correct the number of DMA channels for each SuperH SoC according to specification, Artur's series unbreaks the kernel on the SH7709 SoC allowing Linux to boot on the HP Jornada 680 handheld again. Summary: - Provide unxlate_dev_mem_ptr() in asm/io.h - dma: Correct the number of DMA channels for SH7709 - dma: Drop incorrect SH_DMAC_BASE1 definition for SH4 - dma: Fix DMA channel offset calculation - Remove compiler flag duplication - Refactor header include path addition - Move build rule for cchips/hd6446x/ to arch/sh/Kbuild - Fix -Wmissing-include-dirs warnings for various platforms - Avoid using IRQ0 on SH3 and SH4 - j2: Use ioremap() to translate device tree address into kernel memory" * tag 'sh-for-v6.5-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/glaubitz/sh-linux: sh: Provide unxlate_dev_mem_ptr() in asm/io.h sh: dma: Correct the number of DMA channels for SH7709 sh: dma: Drop incorrect SH_DMAC_BASE1 definition for SH4 sh: dma: Fix DMA channel offset calculation sh: Remove compiler flag duplication sh: Refactor header include path addition sh: Move build rule for cchips/hd6446x/ to arch/sh/Kbuild sh: Fix -Wmissing-include-dirs warnings for various platforms sh: Avoid using IRQ0 on SH3 and SH4 sh: j2: Use ioremap() to translate device tree address into kernel memory
2023-07-05sh: Provide unxlate_dev_mem_ptr() in asm/io.hGuenter Roeck
The unxlate_dev_mem_ptr() function has no prototype on the sh architecture which does not include asm-generic/io.h. This results in the following build failure: drivers/char/mem.c: In function 'read_mem': drivers/char/mem.c:164:25: error: implicit declaration of function 'unxlate_dev_mem_ptr' This compile error is now seen because commit 99b619b37ae1 ("mips: provide unxlate_dev_mem_ptr() in asm/io.h") removed the weak function which was previously in place to handle this problem. Add a trivial macro to the sh header to provide the now missing dummy function. Fixes: 99b619b37ae1 ("mips: provide unxlate_dev_mem_ptr() in asm/io.h") Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Acked-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/20230704190144.2888679-1-linux@roeck-us.net Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2023-07-05sh: dma: Correct the number of DMA channels for SH7709Artur Rojek
According to the hardware manual [1], the DMAC found in the SH7709 SoC features only 4 channels. While at it, also sort the existing targets. [1] https://www.renesas.com/us/en/document/mah/sh7709s-group-hardware-manual (p. 373) Signed-off-by: Artur Rojek <contact@artur-rojek.eu> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/20230527164452.64797-4-contact@artur-rojek.eu Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2023-07-05sh: dma: Drop incorrect SH_DMAC_BASE1 definition for SH4Artur Rojek
None of the supported SH4 family SoCs features a second DMAC module. As this definition negatively impacts DMA channel calculation for the above targets, remove it from the code. Signed-off-by: Artur Rojek <contact@artur-rojek.eu> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/20230527164452.64797-3-contact@artur-rojek.eu Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2023-07-05sh: dma: Fix DMA channel offset calculationArtur Rojek
Various SoCs of the SH3, SH4 and SH4A family, which use this driver, feature a differing number of DMA channels, which can be distributed between up to two DMAC modules. The existing implementation fails to correctly accommodate for all those variations, resulting in wrong channel offset calculations and leading to kernel panics. Rewrite dma_base_addr() in order to properly calculate channel offsets in a DMAC module. Fix dmaor_read_reg() and dmaor_write_reg(), so that the correct DMAC module base is selected for the DMAOR register. Fixes: 7f47c7189b3e8f19 ("sh: dma: More legacy cpu dma chainsawing.") Signed-off-by: Artur Rojek <contact@artur-rojek.eu> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/20230527164452.64797-2-contact@artur-rojek.eu Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2023-07-05sh: Remove compiler flag duplicationMasahiro Yamada
Every compiler flag added by arch/sh/Makefile is passed to the compiler twice: $(KBUILD_CPPFLAGS) + $(KBUILD_CFLAGS) is used for compiling *.c $(KBUILD_CPPFLAGS) + $(KBUILD_AFLAGS) is used for compiling *.S Given the above, adding $(cflags-y) to all of KBUILD_{CPP/C/A}FLAGS ends up with duplication. Add -I options to $(KBUILD_CPPFLAGS), and the rest of $(cflags-y) to KBUILD_{C,A}FLAGS. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Acked-by: Randy Dunlap <rdunlap@infradead.org> Tested-by: Randy Dunlap <rdunlap@infradead.org> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/20230219141555.2308306-4-masahiroy@kernel.org Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2023-07-05sh: Refactor header include path additionMasahiro Yamada
Shorten the code. No functional change intended. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Acked-by: Randy Dunlap <rdunlap@infradead.org> Tested-by: Randy Dunlap <rdunlap@infradead.org> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/20230219141555.2308306-3-masahiroy@kernel.org Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2023-07-05sh: Move build rule for cchips/hd6446x/ to arch/sh/KbuildMasahiro Yamada
This is the last user of core-y in arch/sh. Use the standard obj-y syntax. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Acked-by: Randy Dunlap <rdunlap@infradead.org> Tested-by: Randy Dunlap <rdunlap@infradead.org> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/20230219141555.2308306-2-masahiroy@kernel.org Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2023-07-05sh: Fix -Wmissing-include-dirs warnings for various platformsMasahiro Yamada
The 0day bot reports a lot of warnings (or errors due to CONFIG_WERROR) like this: cc1: error: arch/sh/include/mach-hp6xx: No such file or directory [-Werror=missing-include-dirs] Indeed, arch/sh/include/mach-hp6xx does not exist. While -Wmissing-include-dirs is only a W=1 warning, it may be annoying when CONFIG_BTRFS_FS is enabled because fs/btrfs/Makefile unconditionally adds this warning option. arch/sh/Makefile defines machdir-y for two purposes: - Build platform code in arch/sh/boards/mach-*/ - Add arch/sh/include/mach-*/ to the header search path For the latter, some platforms use arch/sh/include/mach-common/ instead of having its own arch/sh/include/mach-*/. Drop unneeded machdir-y to omit non-existing include directories. To build arch/sh/boards/mach-*/, use the standard obj-y syntax in arch/sh/boards/Makefile. Reported-by: kernel test robot <lkp@intel.com> Link: https://lore.kernel.org/oe-kbuild-all/202302190641.30VVXnPb-lkp@intel.com/ Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Acked-by: Randy Dunlap <rdunlap@infradead.org> Tested-by: Randy Dunlap <rdunlap@infradead.org> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/20230219141555.2308306-1-masahiroy@kernel.org Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2023-06-29Merge tag 'slab-for-6.5' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab Pull slab updates from Vlastimil Babka: - SLAB deprecation: Following the discussion at LSF/MM 2023 [1] and no objections, the SLAB allocator is deprecated by renaming the config option (to make its users notice) to CONFIG_SLAB_DEPRECATED with updated help text. SLUB should be used instead. Existing defconfigs with CONFIG_SLAB are also updated. - SLAB_NO_MERGE kmem_cache flag (Jesper Dangaard Brouer): There are (very limited) cases where kmem_cache merging is undesirable, and existing ways to prevent it are hacky. Introduce a new flag to do that cleanly and convert the existing hacky users. Btrfs plans to use this for debug kernel builds (that use case is always fine), networking for performance reasons (that should be very rare). - Replace the usage of weak PRNGs (David Keisar Schmidt): In addition to using stronger RNGs for the security related features, the code is a bit cleaner. - Misc code cleanups (SeongJae Parki, Xiongwei Song, Zhen Lei, and zhaoxinchao) Link: https://lwn.net/Articles/932201/ [1] * tag 'slab-for-6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab: mm/slab_common: use SLAB_NO_MERGE instead of negative refcount mm/slab: break up RCU readers on SLAB_TYPESAFE_BY_RCU example code mm/slab: add a missing semicolon on SLAB_TYPESAFE_BY_RCU example code mm/slab_common: reduce an if statement in create_cache() mm/slab: introduce kmem_cache flag SLAB_NO_MERGE mm/slab: rename CONFIG_SLAB to CONFIG_SLAB_DEPRECATED mm/slab: remove HAVE_HARDENED_USERCOPY_ALLOCATOR mm/slab_common: Replace invocation of weak PRNG mm/slab: Replace invocation of weak PRNG slub: Don't read nr_slabs and total_objects directly slub: Remove slabs_node() function slub: Remove CONFIG_SMP defined check slub: Put objects_show() into CONFIG_SLUB_DEBUG enabled block slub: Correct the error code when slab_kset is NULL mm/slab: correct return values in comment for _kmem_cache_create()
2023-06-29Merge tag 'drm-next-2023-06-29' of git://anongit.freedesktop.org/drm/drmLinus Torvalds
Pull drm updates from Dave Airlie: "There is one set of patches to misc for a i915 gsc/mei proxy driver. Otherwise it's mostly amdgpu/i915/msm, lots of hw enablement and lots of refactoring. core: - replace strlcpy with strscpy - EDID changes to support further conversion to struct drm_edid - Move i915 DSC parameter code to common DRM helpers - Add Colorspace functionality aperture: - ignore framebuffers with non-primary devices fbdev: - use fbdev i/o helpers - add Kconfig options for fb_ops helpers - use new fb io helpers directly in drivers sysfs: - export DRM connector ID scheduler: - Avoid an infinite loop ttm: - store function table in .rodata - Add query for TTM mem limit - Add NUMA awareness to pools - Export ttm_pool_fini() bridge: - fsl-ldb: support i.MX6SX - lt9211, lt9611: remove blanking packets - tc358768: implement input bus formats, devm cleanups - ti-snd65dsi86: implement wait_hpd_asserted - analogix: fix endless probe loop - samsung-dsim: support swapped clock, fix enabling, support var clock - display-connector: Add support for external power supply - imx: Fix module linking - tc358762: Support reset GPIO panel: - nt36523: Support Lenovo J606F - st7703: Support Anbernic RG353V-V2 - InnoLux G070ACE-L01 support - boe-tv101wum-nl6: Improve initialization - sharp-ls043t1le001: Mode fixes - simple: BOE EV121WXM-N10-1850, S6D7AA0 - Ampire AM-800480L1TMQW-T00H - Rocktech RK043FN48H - Starry himax83102-j02 - Starry ili9882t amdgpu: - add new ctx query flag to handle reset better - add new query/set shadow buffer for rdna3 - DCN 3.2/3.1.x/3.0.x updates - Enable DC_FP on loongarch - PCIe fix for RDNA2 - improve DC FAMS/SubVP support for better power management - partition support for lots of engines - Take NUMA into account when allocating memory - Add new DRM_AMDGPU_WERROR config parameter to help with CI - Initial SMU13 overdrive support - Add support for new colorspace KMS API - W=1 fixes amdkfd: - Query TTM mem limit rather than hardcoding it - GC 9.4.3 partition support - Handle NUMA for partitions - Add debugger interface for enabling gdb - Add KFD event age tracking radeon: - Fix possible UAF i915: - new getparam for PXP support - GSC/MEI proxy driver - Meteorlake display enablement - avoid clearing preallocated framebuffers with TTM - implement framebuffer mmap support - Disable sampler indirect state in bindless heap - Enable fdinfo for GuC backends - GuC loading and firmware table handling fixes - Various refactors for multi-tile enablement - Define MOCS and PAT tables for MTL - GSC/MEI support for Meteorlake - PMU multi-tile support - Large driver kernel doc cleanup - Allow VRR toggling and arbitrary refresh rates - Support async flips on linear buffers on display ver 12+ - Expose CRTC CTM property on ILK/SNB/VLV - New debugfs for display clock frequencies - Hotplug refactoring - Display refactoring - I915_GEM_CREATE_EXT_SET_PAT for Mesa on Meteorlake - Use large rings for compute contexts - HuC loading for MTL - Allow user to set cache at BO creation - MTL powermanagement enhancements - Switch to dedicated workqueues to stop using flush_scheduled_work() - Move display runtime init under display/ - Remove 10bit gamma on desktop gen3 parts, they don't support it habanalabs: - uapi: return 0 for user queries if there was a h/w or f/w error - Add pci health check when we lose connection with the firmware. This can be used to distinguish between pci link down and firmware getting stuck. - Add more info to the error print when TPC interrupt occur. - Firmware fixes msm: - Adreno A660 bindings - SM8350 MDSS bindings fix - Added support for DPU on sm6350 and sm6375 platforms - Implemented tearcheck support to support vsync on SM150 and newer platforms - Enabled missing features (DSPP, DSC, split display) on sc8180x, sc8280xp, sm8450 - Added support for DSI and 28nm DSI PHY on MSM8226 platform - Added support for DSI on sm6350 and sm6375 platforms - Added support for display controller on MSM8226 platform - A690 GPU support - Move cmdstream dumping out of fence signaling path - a610 support - Support for a6xx devices without GMU nouveau: - NULL ptr before deref fixes armada: - implement fbdev emulation as client sun4i: - fix mipi-dsi dotclock - release clocks vc4: - rgb range toggle property - BT601 / BT2020 HDMI support vkms: - convert to drmm helpers - add reflection and rotation support - fix rgb565 conversion gma500: - fix iomem access shmobile: - support renesas soc platform - enable fbdev mxsfb: - Add support for i.MX93 LCDIF stm: - dsi: Use devm_ helper - ltdc: Fix potential invalid pointer deref renesas: - Group drivers in renesas subdirectory to prepare for new platform - Drop deprecated R-Car H3 ES1.x support meson: - Add support for MIPI DSI displays virtio: - add sync object support mediatek: - Add display binding document for MT6795" * tag 'drm-next-2023-06-29' of git://anongit.freedesktop.org/drm/drm: (1791 commits) drm/i915: Fix a NULL vs IS_ERR() bug drm/i915: make i915_drm_client_fdinfo() reference conditional again drm/i915/huc: Fix missing error code in intel_huc_init() drm/i915/gsc: take a wakeref for the proxy-init-completion check drm/msm/a6xx: Add A610 speedbin support drm/msm/a6xx: Add A619_holi speedbin support drm/msm/a6xx: Use adreno_is_aXYZ macros in speedbin matching drm/msm/a6xx: Use "else if" in GPU speedbin rev matching drm/msm/a6xx: Fix some A619 tunables drm/msm/a6xx: Add A610 support drm/msm/a6xx: Add support for A619_holi drm/msm/adreno: Disable has_cached_coherent in GMU wrapper configurations drm/msm/a6xx: Introduce GMU wrapper support drm/msm/a6xx: Move CX GMU power counter enablement to hw_init drm/msm/a6xx: Extend and explain UBWC config drm/msm/a6xx: Remove both GBIF and RBBM GBIF halt on hw init drm/msm/a6xx: Add a helper for software-resetting the GPU drm/msm/a6xx: Improve a6xx_bus_clear_pending_transactions() drm/msm/a6xx: Move a6xx_bus_clear_pending_transactions to a6xx_gpu drm/msm/a6xx: Move force keepalive vote removal to a6xx_gmu_force_off() ...
2023-06-28Merge branch 'expand-stack'Linus Torvalds
This modifies our user mode stack expansion code to always take the mmap_lock for writing before modifying the VM layout. It's actually something we always technically should have done, but because we didn't strictly need it, we were being lazy ("opportunistic" sounds so much better, doesn't it?) about things, and had this hack in place where we would extend the stack vma in-place without doing the proper locking. And it worked fine. We just needed to change vm_start (or, in the case of grow-up stacks, vm_end) and together with some special ad-hoc locking using the anon_vma lock and the mm->page_table_lock, it all was fairly straightforward. That is, it was all fine until Ruihan Li pointed out that now that the vma layout uses the maple tree code, we *really* don't just change vm_start and vm_end any more, and the locking really is broken. Oops. It's not actually all _that_ horrible to fix this once and for all, and do proper locking, but it's a bit painful. We have basically three different cases of stack expansion, and they all work just a bit differently: - the common and obvious case is the page fault handling. It's actually fairly simple and straightforward, except for the fact that we have something like 24 different versions of it, and you end up in a maze of twisty little passages, all alike. - the simplest case is the execve() code that creates a new stack. There are no real locking concerns because it's all in a private new VM that hasn't been exposed to anybody, but lockdep still can end up unhappy if you get it wrong. - and finally, we have GUP and page pinning, which shouldn't really be expanding the stack in the first place, but in addition to execve() we also use it for ptrace(). And debuggers do want to possibly access memory under the stack pointer and thus need to be able to expand the stack as a special case. None of these cases are exactly complicated, but the page fault case in particular is just repeated slightly differently many many times. And ia64 in particular has a fairly complicated situation where you can have both a regular grow-down stack _and_ a special grow-up stack for the register backing store. So to make this slightly more manageable, the bulk of this series is to first create a helper function for the most common page fault case, and convert all the straightforward architectures to it. Thus the new 'lock_mm_and_find_vma()' helper function, which ends up being used by x86, arm, powerpc, mips, riscv, alpha, arc, csky, hexagon, loongarch, nios2, sh, sparc32, and xtensa. So we not only convert more than half the architectures, we now have more shared code and avoid some of those twisty little passages. And largely due to this common helper function, the full diffstat of this series ends up deleting more lines than it adds. That still leaves eight architectures (ia64, m68k, microblaze, openrisc, parisc, s390, sparc64 and um) that end up doing 'expand_stack()' manually because they are doing something slightly different from the normal pattern. Along with the couple of special cases in execve() and GUP. So there's a couple of patches that first create 'locked' helper versions of the stack expansion functions, so that there's a obvious path forward in the conversion. The execve() case is then actually pretty simple, and is a nice cleanup from our old "grow-up stackls are special, because at execve time even they grow down". The #ifdef CONFIG_STACK_GROWSUP in that code just goes away, because it's just more straightforward to write out the stack expansion there manually, instead od having get_user_pages_remote() do it for us in some situations but not others and have to worry about locking rules for GUP. And the final step is then to just convert the remaining odd cases to a new world order where 'expand_stack()' is called with the mmap_lock held for reading, but where it might drop it and upgrade it to a write, only to return with it held for reading (in the success case) or with it completely dropped (in the failure case). In the process, we remove all the stack expansion from GUP (where dropping the lock wouldn't be ok without special rules anyway), and add it in manually to __access_remote_vm() for ptrace(). Thanks to Adrian Glaubitz and Frank Scheiner who tested the ia64 cases. Everything else here felt pretty straightforward, but the ia64 rules for stack expansion are really quite odd and very different from everything else. Also thanks to Vegard Nossum who caught me getting one of those odd conditions entirely the wrong way around. Anyway, I think I want to actually move all the stack expansion code to a whole new file of its own, rather than have it split up between mm/mmap.c and mm/memory.c, but since this will have to be backported to the initial maple tree vma introduction anyway, I tried to keep the patches _fairly_ minimal. Also, while I don't think it's valid to expand the stack from GUP, the final patch in here is a "warn if some crazy GUP user wants to try to expand the stack" patch. That one will be reverted before the final release, but it's left to catch any odd cases during the merge window and release candidates. Reported-by: Ruihan Li <lrh2000@pku.edu.cn> * branch 'expand-stack': gup: add warning if some caller would seem to want stack expansion mm: always expand the stack with the mmap write lock held execve: expand new process stack manually ahead of time mm: make find_extend_vma() fail if write lock not held powerpc/mm: convert coprocessor fault to lock_mm_and_find_vma() mm/fault: convert remaining simple cases to lock_mm_and_find_vma() arm/mm: Convert to using lock_mm_and_find_vma() riscv/mm: Convert to using lock_mm_and_find_vma() mips/mm: Convert to using lock_mm_and_find_vma() powerpc/mm: Convert to using lock_mm_and_find_vma() arm64/mm: Convert to using lock_mm_and_find_vma() mm: make the page fault mmap locking killable mm: introduce new 'lock_mm_and_find_vma()' page fault helper
2023-06-28Merge tag 'mm-nonmm-stable-2023-06-24-19-23' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull non-mm updates from Andrew Morton: - Arnd Bergmann has fixed a bunch of -Wmissing-prototypes in top-level directories - Douglas Anderson has added a new "buddy" mode to the hardlockup detector. It permits the detector to work on architectures which cannot provide the required interrupts, by having CPUs periodically perform checks on other CPUs - Zhen Lei has enhanced kexec's ability to support two crash regions - Petr Mladek has done a lot of cleanup on the hard lockup detector's Kconfig entries - And the usual bunch of singleton patches in various places * tag 'mm-nonmm-stable-2023-06-24-19-23' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (72 commits) kernel/time/posix-stubs.c: remove duplicated include ocfs2: remove redundant assignment to variable bit_off watchdog/hardlockup: fix typo in config HARDLOCKUP_DETECTOR_PREFER_BUDDY powerpc: move arch_trigger_cpumask_backtrace from nmi.h to irq.h devres: show which resource was invalid in __devm_ioremap_resource() watchdog/hardlockup: define HARDLOCKUP_DETECTOR_ARCH watchdog/sparc64: define HARDLOCKUP_DETECTOR_SPARC64 watchdog/hardlockup: make HAVE_NMI_WATCHDOG sparc64-specific watchdog/hardlockup: declare arch_touch_nmi_watchdog() only in linux/nmi.h watchdog/hardlockup: make the config checks more straightforward watchdog/hardlockup: sort hardlockup detector related config values a logical way watchdog/hardlockup: move SMP barriers from common code to buddy code watchdog/buddy: simplify the dependency for HARDLOCKUP_DETECTOR_PREFER_BUDDY watchdog/buddy: don't copy the cpumask in watchdog_next_cpu() watchdog/buddy: cleanup how watchdog_buddy_check_hardlockup() is called watchdog/hardlockup: remove softlockup comment in touch_nmi_watchdog() watchdog/hardlockup: in watchdog_hardlockup_check() use cpumask_copy() watchdog/hardlockup: don't use raw_cpu_ptr() in watchdog_hardlockup_kick() watchdog/hardlockup: HAVE_NMI_WATCHDOG must implement watchdog_hardlockup_probe() watchdog/hardlockup: keep kernel.nmi_watchdog sysctl as 0444 if probe fails ...
2023-06-28Merge tag 'mm-stable-2023-06-24-19-15' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull mm updates from Andrew Morton: - Yosry Ahmed brought back some cgroup v1 stats in OOM logs - Yosry has also eliminated cgroup's atomic rstat flushing - Nhat Pham adds the new cachestat() syscall. It provides userspace with the ability to query pagecache status - a similar concept to mincore() but more powerful and with improved usability - Mel Gorman provides more optimizations for compaction, reducing the prevalence of page rescanning - Lorenzo Stoakes has done some maintanance work on the get_user_pages() interface - Liam Howlett continues with cleanups and maintenance work to the maple tree code. Peng Zhang also does some work on maple tree - Johannes Weiner has done some cleanup work on the compaction code - David Hildenbrand has contributed additional selftests for get_user_pages() - Thomas Gleixner has contributed some maintenance and optimization work for the vmalloc code - Baolin Wang has provided some compaction cleanups, - SeongJae Park continues maintenance work on the DAMON code - Huang Ying has done some maintenance on the swap code's usage of device refcounting - Christoph Hellwig has some cleanups for the filemap/directio code - Ryan Roberts provides two patch series which yield some rationalization of the kernel's access to pte entries - use the provided APIs rather than open-coding accesses - Lorenzo Stoakes has some fixes to the interaction between pagecache and directio access to file mappings - John Hubbard has a series of fixes to the MM selftesting code - ZhangPeng continues the folio conversion campaign - Hugh Dickins has been working on the pagetable handling code, mainly with a view to reducing the load on the mmap_lock - Catalin Marinas has reduced the arm64 kmalloc() minimum alignment from 128 to 8 - Domenico Cerasuolo has improved the zswap reclaim mechanism by reorganizing the LRU management - Matthew Wilcox provides some fixups to make gfs2 work better with the buffer_head code - Vishal Moola also has done some folio conversion work - Matthew Wilcox has removed the remnants of the pagevec code - their functionality is migrated over to struct folio_batch * tag 'mm-stable-2023-06-24-19-15' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (380 commits) mm/hugetlb: remove hugetlb_set_page_subpool() mm: nommu: correct the range of mmap_sem_read_lock in task_mem() hugetlb: revert use of page_cache_next_miss() Revert "page cache: fix page_cache_next/prev_miss off by one" mm/vmscan: fix root proactive reclaim unthrottling unbalanced node mm: memcg: rename and document global_reclaim() mm: kill [add|del]_page_to_lru_list() mm: compaction: convert to use a folio in isolate_migratepages_block() mm: zswap: fix double invalidate with exclusive loads mm: remove unnecessary pagevec includes mm: remove references to pagevec mm: rename invalidate_mapping_pagevec to mapping_try_invalidate mm: remove struct pagevec net: convert sunrpc from pagevec to folio_batch i915: convert i915_gpu_error to use a folio_batch pagevec: rename fbatch_count() mm: remove check_move_unevictable_pages() drm: convert drm_gem_put_pages() to use a folio_batch i915: convert shmem_sg_free_table() to use a folio_batch scatterlist: add sg_set_folio() ...
2023-06-27Merge tag 'hardening-v6.5-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux Pull hardening updates from Kees Cook: "There are three areas of note: A bunch of strlcpy()->strscpy() conversions ended up living in my tree since they were either Acked by maintainers for me to carry, or got ignored for multiple weeks (and were trivial changes). The compiler option '-fstrict-flex-arrays=3' has been enabled globally, and has been in -next for the entire devel cycle. This changes compiler diagnostics (though mainly just -Warray-bounds which is disabled) and potential UBSAN_BOUNDS and FORTIFY _warning_ coverage. In other words, there are no new restrictions, just potentially new warnings. Any new FORTIFY warnings we've seen have been fixed (usually in their respective subsystem trees). For more details, see commit df8fc4e934c12b. The under-development compiler attribute __counted_by has been added so that we can start annotating flexible array members with their associated structure member that tracks the count of flexible array elements at run-time. It is possible (likely?) that the exact syntax of the attribute will change before it is finalized, but GCC and Clang are working together to sort it out. Any changes can be made to the macro while we continue to add annotations. As an example of that last case, I have a treewide commit waiting with such annotations found via Coccinelle: https://git.kernel.org/linus/adc5b3cb48a049563dc673f348eab7b6beba8a9b Also see commit dd06e72e68bcb4 for more details. Summary: - Fix KMSAN vs FORTIFY in strlcpy/strlcat (Alexander Potapenko) - Convert strreplace() to return string start (Andy Shevchenko) - Flexible array conversions (Arnd Bergmann, Wyes Karny, Kees Cook) - Add missing function prototypes seen with W=1 (Arnd Bergmann) - Fix strscpy() kerndoc typo (Arne Welzel) - Replace strlcpy() with strscpy() across many subsystems which were either Acked by respective maintainers or were trivial changes that went ignored for multiple weeks (Azeem Shaikh) - Remove unneeded cc-option test for UBSAN_TRAP (Nick Desaulniers) - Add KUnit tests for strcat()-family - Enable KUnit tests of FORTIFY wrappers under UML - Add more complete FORTIFY protections for strlcat() - Add missed disabling of FORTIFY for all arch purgatories. - Enable -fstrict-flex-arrays=3 globally - Tightening UBSAN_BOUNDS when using GCC - Improve checkpatch to check for strcpy, strncpy, and fake flex arrays - Improve use of const variables in FORTIFY - Add requested struct_size_t() helper for types not pointers - Add __counted_by macro for annotating flexible array size members" * tag 'hardening-v6.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: (54 commits) netfilter: ipset: Replace strlcpy with strscpy uml: Replace strlcpy with strscpy um: Use HOST_DIR for mrproper kallsyms: Replace all non-returning strlcpy with strscpy sh: Replace all non-returning strlcpy with strscpy of/flattree: Replace all non-returning strlcpy with strscpy sparc64: Replace all non-returning strlcpy with strscpy Hexagon: Replace all non-returning strlcpy with strscpy kobject: Use return value of strreplace() lib/string_helpers: Change returned value of the strreplace() jbd2: Avoid printing outside the boundary of the buffer checkpatch: Check for 0-length and 1-element arrays riscv/purgatory: Do not use fortified string functions s390/purgatory: Do not use fortified string functions x86/purgatory: Do not use fortified string functions acpi: Replace struct acpi_table_slit 1-element array with flex-array clocksource: Replace all non-returning strlcpy with strscpy string: use __builtin_memcpy() in strlcpy/strlcat staging: most: Replace all non-returning strlcpy with strscpy drm/i2c: tda998x: Replace all non-returning strlcpy with strscpy ...
2023-06-27Merge tag 'locking-core-2023-06-27' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull locking updates from Ingo Molnar: - Introduce cmpxchg128() -- aka. the demise of cmpxchg_double() The cmpxchg128() family of functions is basically & functionally the same as cmpxchg_double(), but with a saner interface. Instead of a 6-parameter horror that forced u128 - u64/u64-halves layout details on the interface and exposed users to complexity, fragility & bugs, use a natural 3-parameter interface with u128 types. - Restructure the generated atomic headers, and add kerneldoc comments for all of the generic atomic{,64,_long}_t operations. The generated definitions are much cleaner now, and come with documentation. - Implement lock_set_cmp_fn() on lockdep, for defining an ordering when taking multiple locks of the same type. This gets rid of one use of lockdep_set_novalidate_class() in the bcache code. - Fix raw_cpu_generic_try_cmpxchg() bug due to an unintended variable shadowing generating garbage code on Clang on certain ARM builds. * tag 'locking-core-2023-06-27' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (43 commits) locking/atomic: scripts: fix ${atomic}_dec_if_positive() kerneldoc percpu: Fix self-assignment of __old in raw_cpu_generic_try_cmpxchg() locking/atomic: treewide: delete arch_atomic_*() kerneldoc locking/atomic: docs: Add atomic operations to the driver basic API documentation locking/atomic: scripts: generate kerneldoc comments docs: scripts: kernel-doc: accept bitwise negation like ~@var locking/atomic: scripts: simplify raw_atomic*() definitions locking/atomic: scripts: simplify raw_atomic_long*() definitions locking/atomic: scripts: split pfx/name/sfx/order locking/atomic: scripts: restructure fallback ifdeffery locking/atomic: scripts: build raw_atomic_long*() directly locking/atomic: treewide: use raw_atomic*_<op>() locking/atomic: scripts: add trivial raw_atomic*_<op>() locking/atomic: scripts: factor out order template generation locking/atomic: scripts: remove leftover "${mult}" locking/atomic: scripts: remove bogus order parameter locking/atomic: xtensa: add preprocessor symbols locking/atomic: x86: add preprocessor symbols locking/atomic: sparc: add preprocessor symbols locking/atomic: sh: add preprocessor symbols ...
2023-06-27backlight/lv5207lp: Rename struct lv5207lp_platform_data.fbdev to 'dev'Thomas Zimmermann
Rename struct lv5207lp_platform_data.fbdev to 'dev', as it stores a pointer to the Linux platform device; not the fbdev device. Makes the code easier to understand. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Rich Felker <dalias@libc.org> Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Cc: Lee Jones <lee@kernel.org> Cc: Daniel Thompson <daniel.thompson@linaro.org> Cc: Jingoo Han <jingoohan1@gmail.com> Cc: linux-sh@vger.kernel.org Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Reviewed-by: Sam Ravnborg <sam@ravnborg.org> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20230613110953.24176-7-tzimmermann@suse.de
2023-06-27backlight/gpio_backlight: Rename field 'fbdev' to 'dev'Thomas Zimmermann
Rename the field 'fbdev' in struct gpio_backlight_platform_data and struct gpio_backlight to 'dev', as they store pointers to the Linux platform device; not the fbdev device. Makes the code easier to understand. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Cc: Rich Felker <dalias@libc.org> Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Cc: Lee Jones <lee@kernel.org> Cc: Daniel Thompson <daniel.thompson@linaro.org> Cc: Jingoo Han <jingoohan1@gmail.com> Cc: linux-sh@vger.kernel.org Reviewed-by: Sam Ravnborg <sam@ravnborg.org> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20230613110953.24176-5-tzimmermann@suse.de
2023-06-24mm/fault: convert remaining simple cases to lock_mm_and_find_vma()Linus Torvalds
This does the simple pattern conversion of alpha, arc, csky, hexagon, loongarch, nios2, sh, sparc32, and xtensa to the lock_mm_and_find_vma() helper. They all have the regular fault handling pattern without odd special cases. The remaining architectures all have something that keeps us from a straightforward conversion: ia64 and parisc have stacks that can grow both up as well as down (and ia64 has special address region checks). And m68k, microblaze, openrisc, sparc64, and um end up having extra rules about only expanding the stack down a limited amount below the user space stack pointer. That is something that x86 used to do too (long long ago), and it probably could just be skipped, but it still makes the conversion less than trivial. Note that this conversion was done manually and with the exception of alpha without any build testing, because I have a fairly limited cross- building environment. The cases are all simple, and I went through the changes several times, but... Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2023-06-19sh: move the ARCH_DMA_MINALIGN definition to asm/cache.hCatalin Marinas
The sh architecture defines ARCH_DMA_MINALIGN in asm/page.h. Move it to asm/cache.h to allow a generic ARCH_DMA_MINALIGN definition in linux/cache.h without redefine errors/warnings. Link: https://lkml.kernel.org/r/20230613155245.1228274-4-catalin.marinas@arm.com Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Rich Felker <dalias@libc.org> Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: kernel test robot <lkp@intel.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Simek <monstr@monstr.eu> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-06-19sh/hugetlb: pte_alloc_huge() pte_offset_huge()Hugh Dickins
pte_alloc_map() expects to be followed by pte_unmap(), but hugetlb omits that: to keep balance in future, use the recently added pte_alloc_huge() instead; with pte_offset_huge() a better name for pte_offset_kernel(). Link: https://lkml.kernel.org/r/ee885978-7355-624b-cfe2-c3d75672b842@google.com Signed-off-by: Hugh Dickins <hughd@google.com> Cc: Alexander Gordeev <agordeev@linux.ibm.com> Cc: Alexandre Ghiti <alexghiti@rivosinc.com> Cc: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Christian Borntraeger <borntraeger@linux.ibm.com> Cc: Chris Zankel <chris@zankel.net> Cc: Claudio Imbrenda <imbrenda@linux.ibm.com> Cc: David Hildenbrand <david@redhat.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Greg Ungerer <gerg@linux-m68k.org> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Helge Deller <deller@gmx.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: John David Anglin <dave.anglin@bell.net> Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Simek <monstr@monstr.eu> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Mike Rapoport (IBM) <rppt@kernel.org> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Qi Zheng <zhengqi.arch@bytedance.com> Cc: Russell King <linux@armlinux.org.uk> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-06-16sh/cpu: Switch to arch_cpu_finalize_init()Thomas Gleixner
check_bugs() is about to be phased out. Switch over to the new arch_cpu_finalize_init() implementation. No functional change. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/r/20230613224545.371697797@linutronix.de
2023-06-14sh: Replace all non-returning strlcpy with strscpyAzeem Shaikh
strlcpy() reads the entire source buffer first. This read may exceed the destination size limit. This is both inefficient and can lead to linear read overflows if a source string is not NUL-terminated [1]. In an effort to remove strlcpy() completely [2], replace strlcpy() here with strscpy(). No return values were used, so direct replacement is safe. [1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strlcpy [2] https://github.com/KSPP/linux/issues/89 Signed-off-by: Azeem Shaikh <azeemshaikh38@gmail.com> Acked-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Tested-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20230530163041.985456-1-azeemshaikh38@gmail.com
2023-06-11sh: Avoid using IRQ0 on SH3 and SH4Sergey Shtylyov
IRQ0 is no longer returned by platform_get_irq() and its ilk -- they now return -EINVAL instead. However, the kernel code supporting SH3/4-based SoCs still maps the IRQ #s starting at 0 -- modify that code to start the IRQ #s from 16 instead. The patch should mostly affect the AP-SH4A-3A/AP-SH4AD-0A boards as they indeed are using IRQ0 for the SMSC911x compatible Ethernet chip. Fixes: ce753ad1549c ("platform: finally disallow IRQ0 in platform_get_irq() and its ilk") Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Tested-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Tested-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/71105dbf-cdb0-72e1-f9eb-eeda8e321696@omp.ru Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2023-06-09thread_info: move function declarations to linux/thread_info.hArnd Bergmann
There are a few __weak functions in kernel/fork.c, which architectures can override. If there is no prototype, the compiler warns about them: kernel/fork.c:164:13: error: no previous prototype for 'arch_release_task_struct' [-Werror=missing-prototypes] kernel/fork.c:991:20: error: no previous prototype for 'arch_task_cache_init' [-Werror=missing-prototypes] kernel/fork.c:1086:12: error: no previous prototype for 'arch_dup_task_struct' [-Werror=missing-prototypes] There are already prototypes in a number of architecture specific headers that have addressed those warnings before, but it's much better to have these in a single place so the warning no longer shows up anywhere. Link: https://lkml.kernel.org/r/20230517131102.934196-14-arnd@kernel.org Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Boqun Feng <boqun.feng@gmail.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Christoph Lameter <cl@linux.com> Cc: Dennis Zhou <dennis@kernel.org> Cc: Eric Paris <eparis@redhat.com> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Helge Deller <deller@gmx.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Simek <monstr@monstr.eu> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Paul Moore <paul@paul-moore.com> Cc: Pavel Machek <pavel@ucw.cz> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rafael@kernel.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Waiman Long <longman@redhat.com> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-06-09init: consolidate prototypes in linux/init.hArnd Bergmann
The init/main.c file contains some extern declarations for functions defined in architecture code, and it defines some other functions that are called from architecture code with a custom prototype. Both of those result in warnings with 'make W=1': init/calibrate.c:261:37: error: no previous prototype for 'calibrate_delay_is_known' [-Werror=missing-prototypes] init/main.c:790:20: error: no previous prototype for 'mem_encrypt_init' [-Werror=missing-prototypes] init/main.c:792:20: error: no previous prototype for 'poking_init' [-Werror=missing-prototypes] arch/arm64/kernel/irq.c:122:13: error: no previous prototype for 'init_IRQ' [-Werror=missing-prototypes] arch/arm64/kernel/time.c:55:13: error: no previous prototype for 'time_init' [-Werror=missing-prototypes] arch/x86/kernel/process.c:935:13: error: no previous prototype for 'arch_post_acpi_subsys_init' [-Werror=missing-prototypes] init/calibrate.c:261:37: error: no previous prototype for 'calibrate_delay_is_known' [-Werror=missing-prototypes] kernel/fork.c:991:20: error: no previous prototype for 'arch_task_cache_init' [-Werror=missing-prototypes] Add prototypes for all of these in include/linux/init.h or another appropriate header, and remove the duplicate declarations from architecture specific code. [sfr@canb.auug.org.au: declare time_init_early()] Link: https://lkml.kernel.org/r/20230519124311.5167221c@canb.auug.org.au Link: https://lkml.kernel.org/r/20230517131102.934196-12-arnd@kernel.org Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Boqun Feng <boqun.feng@gmail.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Christoph Lameter <cl@linux.com> Cc: Dennis Zhou <dennis@kernel.org> Cc: Eric Paris <eparis@redhat.com> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Helge Deller <deller@gmx.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Simek <monstr@monstr.eu> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Paul Moore <paul@paul-moore.com> Cc: Pavel Machek <pavel@ucw.cz> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rafael@kernel.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Waiman Long <longman@redhat.com> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-06-09cachestat: wire up cachestat for other architecturesNhat Pham
cachestat is previously only wired in for x86 (and architectures using the generic unistd.h table): https://lore.kernel.org/lkml/20230503013608.2431726-1-nphamcs@gmail.com/ This patch wires cachestat in for all the other architectures. [nphamcs@gmail.com: wire up cachestat for arm64] Link: https://lkml.kernel.org/r/20230511092843.3896327-1-nphamcs@gmail.com Link: https://lkml.kernel.org/r/20230510195806.2902878-1-nphamcs@gmail.com Signed-off-by: Nhat Pham <nphamcs@gmail.com> Tested-by: Michael Ellerman <mpe@ellerman.id.au> [powerpc] Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> [m68k] Reviewed-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Heiko Carstens <hca@linux.ibm.com> [s390] Cc: Alexander Gordeev <agordeev@linux.ibm.com> Cc: Christian Borntraeger <borntraeger@linux.ibm.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Chris Zankel <chris@zankel.net> Cc: David S. Miller <davem@davemloft.net> Cc: Helge Deller <deller@gmx.de> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Cc: Matt Turner <mattst88@gmail.com> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Richard Henderson <richard.henderson@linaro.org> Cc: Rich Felker <dalias@libc.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Sven Schnelle <svens@linux.ibm.com> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-06-05locking/atomic: sh: add preprocessor symbolsMark Rutland
Some atomics can be implemented in several different ways, e.g. FULL/ACQUIRE/RELEASE ordered atomics can be implemented in terms of RELAXED atomics, and ACQUIRE/RELEASE/RELAXED can be implemented in terms of FULL ordered atomics. Other atomics are optional, and don't exist in some configurations (e.g. not all architectures implement the 128-bit cmpxchg ops). Subsequent patches will require that architectures define a preprocessor symbol for any atomic (or ordering variant) which is optional. This will make the fallback ifdeffery more robust, and simplify future changes. Add the required definitions to arch/sh. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20230605070124.3741859-11-mark.rutland@arm.com
2023-06-05locking/atomic: make atomic*_{cmp,}xchg optionalMark Rutland
Most architectures define the atomic/atomic64 xchg and cmpxchg operations in terms of arch_xchg and arch_cmpxchg respectfully. Add fallbacks for these cases and remove the trivial cases from arch code. On some architectures the existing definitions are kept as these are used to build other arch_atomic*() operations. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20230605070124.3741859-5-mark.rutland@arm.com
2023-05-26mm/slab: rename CONFIG_SLAB to CONFIG_SLAB_DEPRECATEDVlastimil Babka
As discussed at LSF/MM [1] [2] and with no objections raised there, deprecate the SLAB allocator. Rename the user-visible option so that users with CONFIG_SLAB=y get a new prompt with explanation during make oldconfig, while make olddefconfig will just switch to SLUB. In all defconfigs with CONFIG_SLAB=y remove the line so those also switch to SLUB. Regressions due to the switch should be reported to linux-mm and slab maintainers. [1] https://lore.kernel.org/all/4b9fc9c6-b48c-198f-5f80-811a44737e5f@suse.cz/ [2] https://lwn.net/Articles/932201/ Signed-off-by: Vlastimil Babka <vbabka@suse.cz> Acked-by: Hyeonggon Yoo <42.hyeyoo@gmail.com> Acked-by: David Rientjes <rientjes@google.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> # m68k Acked-by: Helge Deller <deller@gmx.de> # parisc
2023-05-10sh: j2: Use ioremap() to translate device tree address into kernel memoryJohn Paul Adrian Glaubitz
Addresses the following warning when building j2_defconfig: arch/sh/kernel/cpu/sh2/probe.c: In function 'scan_cache': arch/sh/kernel/cpu/sh2/probe.c:24:16: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] 24 | j2_ccr_base = (u32 __iomem *)of_flat_dt_translate_address(node); | Fixes: 5a846abad07f ("sh: add support for J-Core J2 processor") Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Tested-by: Rob Landley <rob@landley.net> Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/20230503125746.331835-1-glaubitz@physik.fu-berlin.de Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
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