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2020-09-18MIPS: generic: Init command line with fw_init_cmdline()Paul Cercueil
The function bootcmdline_init() in arch/mips/kernel/setup.c will populate the boot_command_line string using the parameters hardcoded in the kernel, and those provided in the devicetree file. Then, it would append the content of the arcs_cmdline variable, which is filled by the board's plat_mem_setup() function. The plat_mem_setup() function for the generic MIPS board would just copy the current boot_command_line to arcs_cmdline, which is nonsense for two reasons: - the result will be appended to the boot_command_line anyway, so all it does is duplicate every single parameter on the command line; - the code did not perform at all what it's supposed to, which is to retrieve the parameters passed by the bootloader. Fix this by calling fw_init_cmdline() in plat_mem_setup(), which will properly initialize arcs_cmdline to the parameters passed by the bootloader. Signed-off-by: Paul Cercueil <paul@crapouillou.net> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-09-18MIPS: generic: Allow boards to set system typePaul Cercueil
Check for the system_type variable in the get_system_type() function. If non-NULL, return it as the system type. Signed-off-by: Paul Cercueil <paul@crapouillou.net> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-09-18MIPS: Kconfig: add MIPS_GENERIC_KERNEL symbolPaul Cercueil
The MIPS_GENERIC symbol now won't select any other configuration option. The MIPS_GENERIC_KERNEL will select all the options that the previous MIPS_GENERIC option did select, and will select MIPS_GENERIC as well. The whole point of this, is that it now becomes possible to compile a kernel for a SoC supported by the arch/mips/generic/ code, without making that kernel generic itself. Signed-off-by: Paul Cercueil <paul@crapouillou.net> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-09-18MIPS: cpu-probe: ingenic: Fix broken BUG_ONPaul Cercueil
The previous code was doing: BUG_ON(!__builtin_constant_p(cpu_has_counter) || cpu_has_counter); This only worked as the "cpu_has_counter" macro was overridden in <cpu-feature-overrides.h>. The default "cpu_has_counter" macro is non-constant, which triggered the BUG_ON() independently of the value returned by the macro. What we want to check here, is that *if* the macro was overridden to a compile-time constant, then must be defined to zero, otherwise it's a bug. So the correct check is: BUG_ON(__builtin_constant_p(cpu_has_counter) && cpu_has_counter); Signed-off-by: Paul Cercueil <paul@crapouillou.net> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-09-18MIPS: cpu-probe: Mark XBurst CPU as having vtagged cachesPaul Cercueil
XBurst CPUs present in Ingenic SoCs have virtually tagged caches, according to the <cpu-features-override.h> header. Add that information to cpu_probe_ingenic(). Signed-off-by: Paul Cercueil <paul@crapouillou.net> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-09-18MIPS: cpu-probe: Set Ingenic's writecombine to _CACHE_CACHABLE_WAPaul Cercueil
Previously, in cpu_probe_ingenic(), c->writecombine was set to _CACHE_UNCACHED_ACCELERATED, but this macro was defined differently when CONFIG_MACH_INGENIC was set. This made it impossible to support multiple CPUs. Address this issue by setting c->writecombine to _CACHE_CACHABLE_WA directly and removing the dependency on CONFIG_MACH_INGENIC. Signed-off-by: Paul Cercueil <paul@crapouillou.net> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-09-18MIPS: configs: lb60: Fix defconfig not selecting correct boardPaul Cercueil
Since INGENIC_GENERIC_BOARD was introduced, the JZ4740_QI_LB60 option is no longer the default, so the symbol has to be selected by the defconfig, otherwise the kernel built will be for a generic Ingenic board and won't have the Device Tree blob built-in. Cc: stable@vger.kernel.org # v5.7 Fixes: 62249209a772 ("MIPS: ingenic: Default to a generic board") Signed-off-by: Paul Cercueil <paul@crapouillou.net> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-09-18MIPS: Loongson64: Increase NR_IRQS to 320Huacai Chen
Modernized Loongson64 uses a hierarchical organization for interrupt controllers (INTCs), all INTC nodes (not only leaf nodes) need some IRQ numbers. This means 280 (i.e., NR_IRQS_LEGACY + NR_MIPS_CPU_IRQS + 256) is not enough to represent all interrupts, so let's increase NR_IRQS to 320 (NR_IRQS_LEGACY + NR_MIPS_CPU_IRQS + NR_MAX_CHAINED_IRQS + 256). Signed-off-by: Huacai Chen <chenhc@lemote.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-09-18MIPS: netlogic: Remove unused codeYouling Tang
Remove some unused code. Signed-off-by: Youling Tang <tangyouling@loongson.cn> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-09-18MIPS: OCTEON: use devm_platform_ioremap_resourceQinglang Miao
Note that error handling on the result of a call to platform_get_resource() is unneeded when the value is passed to devm_ioremap_resource(), so remove it. Then use the helper function that wraps the calls to platform_get_resource() and devm_ioremap_resource() together. Signed-off-by: Qinglang Miao <miaoqinglang@huawei.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-09-18MIPS: pci: use devm_platform_ioremap_resource_bynameZhang Qilong
Use the devm_platform_ioremap_resource_byname() helper instead of calling platform_get_resource_byname() and devm_ioremap_resource() separately. Signed-off-by: Zhang Qilong <zhangqilong3@huawei.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-09-18MIPS: Correct the header guard of r4k-timer.hWei Li
Rename the header guard of r4k-timer.h from __ASM_R4K_TYPES_H to __ASM_R4K_TIMER_H what corresponding with the file name. Signed-off-by: Wei Li <liwei391@huawei.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-09-07MIPS: Remove mach-*/war.hThomas Bogendoerfer
After conversion of all WAR defines we can now remove all mach-*/war.h files. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-09-07MIPS: Get rid of CAVIUM_OCTEON_DCACHE_PREFETCH_WARThomas Bogendoerfer
CAVIUM_OCTEON_DCACHE_PREFETCH_WAR is a check for Octeon model CN6XXXX. By using the version check we can remove the define. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-09-07MIPS: Get rid of BCM1250_M3_WARThomas Bogendoerfer
BCM1250_M3_WAR is depending on CONFIG_CONFIG_SB1_PASS_2_WORKAROUNDS. So using this option directly lets and remove define. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-09-07MIPS: Replace SIBYTE_1956_WAR by CONFIG_SB1_PASS_2_WORKAROUNDSThomas Bogendoerfer
SB1250 uart bug is related to PASS 2 workarounds. Use config CONFIG_SB1_PASS_2_WORKAROUNDS directly and get rid of SIBYTE_1956_WAR. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-09-07MIPS: Convert MIPS34K_MISSED_ITLB_WAR into a config optionThomas Bogendoerfer
Use a new config option to enable MIPS 34K ITLB workaround and remove define from different war.h files. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-09-07MIPS: Convert R10000_LLSC_WAR info a config optionThomas Bogendoerfer
Use a new config option to enabel R1000_LLSC workaound and remove define from different war.h files. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-09-07MIPS: Convert ICACHE_REFILLS_WORKAROUND_WAR into a config optionThomas Bogendoerfer
Use a new config option to enable I-cache refill workaround and remove define from different war.h files. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-09-07MIPS: Convert TX49XX_ICACHE_INDEX_INV into a config optionThomas Bogendoerfer
Use a new config option to enable TX49XX I-cache index invalidate workaround and remove define from different war.h files. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-09-07MIPS: Remove MIPS4K_ICACHE_REFILL_WAR and MIPS_CACHE_SYNC_WARThomas Bogendoerfer
Neither MIPS4K_ICACHE_REFILL_WAR nor MIPS_CACHE_SYNC_WAR are implemented, so removing defines for it won't change anything. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-09-07MIPS: Convert R4600_V2_HIT_CACHEOP into a config optionThomas Bogendoerfer
Use a new config option to enable R4600 V2 cacheop hit workaround and remove define from different war.h files. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-09-07MIPS: Convert R4600_V1_HIT_CACHEOP into a config optionThomas Bogendoerfer
Use a new config option to enable R4600 V1 cacheop hit workaround and remove define from the different war.h files. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-09-07MIPS: Convert R4600_V1_INDEX_ICACHEOP into a config optionThomas Bogendoerfer
Use a new config option to enable R4600 V1 index I-cacheop workaround and remove define from different war.h files. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-09-07MIPS: dts/ingenic: Cleanup qi_lb60.dtsPaul Cercueil
Cleanup a bit the Device Tree file: 1. Respect the number of cells in GPIO descriptors and keyboard matrix; 2. Use 'ecc-engine' instead of deprecated 'ingenic,bch-controller' property; 3. The NAND's rb-gpios is actually active high; 3. The FRE/FWE pins must be configured in the proper mode for the NAND to work if it was not already done by the bootloader. Signed-off-by: Paul Cercueil <paul@crapouillou.net> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-09-07MIPS: Loongson64: Remove unused loongson_reboot.Jinyang He
Commit 1bdb7b76705a ("MIPS: Loongson64: Cleanup unused code") left the loongson_reboot unused, delete it. Signed-off-by: Jinyang He <hejinyang@loongson.cn> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-09-03MIPS: p5600: Discard UCA config selectionJinyang He
Commit 2a5984360b01 ("MIPS: Drop CPU_SUPPORTS_UNCACHED_ACCELERATED") removed UCA config, but left the selection unused, delete it. Signed-off-by: Jinyang He <hejinyang@loongson.cn> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-09-03MIPS: Use rcu to lookup a task in mipsmt_sys_sched_setaffinity()Davidlohr Bueso
The call simply looks up the corresponding task (without iterating the tasklist), which is safe under rcu instead of the tasklist_lock. In addition, the setaffinity counter part already does this. Signed-off-by: Davidlohr Bueso <dbueso@suse.de> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-09-03MIPS: Add support for ZSTD-compressed kernelsPaul Cercueil
Add support for self-extracting kernels with a ZSTD compression. Tested on a kernel for the GCW-Zero, it allows to reduce the size of the kernel file from 4.1 MiB with gzip to 3.5 MiB with ZSTD, and boots just as fast. Compressed kernels are now also compiled with -D__DISABLE_EXPORTS in order to disable the EXPORT_SYMBOL() macros inside of lib/zstd/decompress.c. Signed-off-by: Paul Cercueil <paul@crapouillou.net> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-09-03lib: decompress_unzstd: Limit output sizePaul Cercueil
The zstd decompression code, as it is right now, will most likely fail on 32-bit systems, as the default output buffer size causes the buffer's end address to overflow. Address this issue by setting a sane default to the default output size, with a value that won't overflow the buffer's end address. Signed-off-by: Paul Cercueil <paul@crapouillou.net> Reviewed-by: Nick Terrell <terrelln@fb.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-08-26MIPS: SGI-IP32: No need to include mc14818*.hThomas Bogendoerfer
Nothing needs the includes in ip32-setup.c. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-08-26MIPS: Remove unused header file m48t37.hThomas Bogendoerfer
No users -> remove it. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-08-26MIPS: Loongson2ef: Remove specific mc146818rtc.hThomas Bogendoerfer
Loonson2ef's mc146818rtc.h is the same as the generic one -> remove it. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Acked-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-08-26MIPS: SGI-IP27: No need for kmalloc.hThomas Bogendoerfer
SGI-IP27 is always cache coherent so we can use generic kmalloc.h and remove the ip27 specific one. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-08-24MIPS: Remove PNX833x alias NXP_STB22xThomas Bogendoerfer
Remove another unused MIPS platform. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-08-24MIPS: Paravirt: remove remaining pieces of paravirtThomas Bogendoerfer
Commit 35546aeede8e ("MIPS: Retire kvm paravirt") removed kvm paravirt support, but missed arch/mips/include/mach-paravirt. Remove it as well. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-08-17MIPS: BCM47xx: Include bcm47xx_sprom.hFlorian Fainelli
Now that bcm47xx_sprom.h contains a prototype for bcm47xx_fill_sprom, include that header file directly from bcm47xx.h. Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-08-17firmware: bcm47xx_sprom: Fix -Wmissing-prototypes warningsFlorian Fainelli
bcm47xx_sprom.h did not include a prototype for bcm47xx_fill_sprom() therefore add one, and make sure we do include that header to fix -Wmissing-prototypes warnings. Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-08-17MIPS: BCM63xx: switch to SPDX license identifierÁlvaro Fernández Rojas
Use SPDX license indentifier instead of local reference to COPYING. Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com> Acked-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-08-17MIPS: BCM63xx: refactor board declarationsÁlvaro Fernández Rojas
Current board declarations are a mess. Let's put some order and make them follow the same structure. Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com> Acked-by: Florian Fainelli <f.fainelli@gmail.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-08-17MIPS: BCM63xx: enable EHCI for DWV-S0 boardÁlvaro Fernández Rojas
BCM6358 SoCs have OHCI and EHCI controllers that share the same USB ports. Therefore, the board should also have EHCI enabled. Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com> Acked-by: Florian Fainelli <f.fainelli@gmail.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-08-17MIPS: BCM63xx: remove EHCI from BCM6348 boardsÁlvaro Fernández Rojas
There's no EHCI controller on BCM6348. Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com> Acked-by: Florian Fainelli <f.fainelli@gmail.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-08-17MIPS: BCM63xx: remove duplicated new linesÁlvaro Fernández Rojas
There are 3 duplicated new lines, let's remove them. Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com> Acked-by: Florian Fainelli <f.fainelli@gmail.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-08-17MIPS: lantiq: add missing GPHY clock aliases for ar10 and grx390Aleksander Jan Bajkowski
Add missing GPHY clock aliases for ar10 (xrx300) and grx390 (xrx330). PMU in ar10 and grx390 differs from vr9. Ar10 has 3 and grx390 has 4 built-in GPHY compared to vr9 which has 2. Corespondings PMU bit: GPHY0 -> bit 29 GPHY1 -> bit 30 GPHY2 -> bit 31 GPHY3 -> bit 26 Tested on D-Link DWR-966 with OpenWRT. Signed-off-by: Aleksander Jan Bajkowski <olek2@wp.pl> Cc: linux-mips@vger.kernel.org Cc: john@phrozen.org Cc: hauke@hauke-m.de Cc: tsbogend@alpha.franken.de Acked-by: Hauke Mehrtens <hauke@hauke-m.de> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-08-17MIPS: Loongson: Use default CONFIG_FRAME_WARN as 2048 for Loongson64 to fix ↵Tiezhu Yang
build warnings After commit 70b838292bef ("MIPS: Update default config file for Loongson-3"), CONFIG_VHOST_SCSI and CONFIG_VHOST are set when use loongson3_defconfig, and then there exists the following two build warnings related with these two configs: CC [M] drivers/vhost/scsi.o drivers/vhost/scsi.c: In function ‘vhost_scsi_flush’: drivers/vhost/scsi.c:1374:1: warning: the frame size of 1040 bytes is larger than 1024 bytes [-Wframe-larger-than=] } ^ LD [M] drivers/vhost/vhost_scsi.o CC [M] drivers/vhost/vsock.o LD [M] drivers/vhost/vhost_vsock.o CC [M] drivers/vhost/vhost.o drivers/vhost/vhost.c: In function ‘log_used’: drivers/vhost/vhost.c:1896:1: warning: the frame size of 1040 bytes is larger than 1024 bytes [-Wframe-larger-than=] } ^ CONFIG_FRAME_WARN=2048 can fix it, since the default CONFIG_FRAME_WARN for 64BIT is 2048, just delete the CONFIG_FRAME_WARN line in defconfig. config FRAME_WARN int "Warn for stack frames larger than" range 0 8192 default 2048 if GCC_PLUGIN_LATENT_ENTROPY default 1280 if (!64BIT && PARISC) default 1024 if (!64BIT && !PARISC) default 2048 if 64BIT Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-08-17MIPS: ftrace: Remove redundant #ifdef CONFIG_DYNAMIC_FTRACEZejiang Tang
There exists redundant #ifdef CONFIG_DYNAMIC_FTRACE in ftrace.c, remove it. Signed-off-by: Zejiang Tang <tangzejiang@loongson.cn> Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-08-16Linux 5.9-rc1Linus Torvalds
2020-08-16Merge tag 'io_uring-5.9-2020-08-15' of git://git.kernel.dk/linux-blockLinus Torvalds
Pull io_uring fixes from Jens Axboe: "A few differerent things in here. Seems like syzbot got some more io_uring bits wired up, and we got a handful of reports and the associated fixes are in here. General fixes too, and a lot of them marked for stable. Lastly, a bit of fallout from the async buffered reads, where we now more easily trigger short reads. Some applications don't really like that, so the io_read() code now handles short reads internally, and got a cleanup along the way so that it's now easier to read (and documented). We're now passing tests that failed before" * tag 'io_uring-5.9-2020-08-15' of git://git.kernel.dk/linux-block: io_uring: short circuit -EAGAIN for blocking read attempt io_uring: sanitize double poll handling io_uring: internally retry short reads io_uring: retain iov_iter state over io_read/io_write calls task_work: only grab task signal lock when needed io_uring: enable lookup of links holding inflight files io_uring: fail poll arm on queue proc failure io_uring: hold 'ctx' reference around task_work queue + execute fs: RWF_NOWAIT should imply IOCB_NOIO io_uring: defer file table grabbing request cleanup for locked requests io_uring: add missing REQ_F_COMP_LOCKED for nested requests io_uring: fix recursive completion locking on oveflow flush io_uring: use TWA_SIGNAL for task_work uncondtionally io_uring: account locked memory before potential error case io_uring: set ctx sq/cq entry count earlier io_uring: Fix NULL pointer dereference in loop_rw_iter() io_uring: add comments on how the async buffered read retry works io_uring: io_async_buf_func() need not test page bit
2020-08-16parisc: fix PMD pages allocation by restoring pmd_alloc_one()Mike Rapoport
Commit 1355c31eeb7e ("asm-generic: pgalloc: provide generic pmd_alloc_one() and pmd_free_one()") converted parisc to use generic version of pmd_alloc_one() but it missed the fact that parisc uses order-1 pages for PMD. Restore the original version of pmd_alloc_one() for parisc, just use GFP_PGTABLE_KERNEL that implies __GFP_ZERO instead of GFP_KERNEL and memset. Fixes: 1355c31eeb7e ("asm-generic: pgalloc: provide generic pmd_alloc_one() and pmd_free_one()") Reported-by: Meelis Roos <mroos@linux.ee> Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Tested-by: Meelis Roos <mroos@linux.ee> Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org> Link: https://lkml.kernel.org/r/9f2b5ebd-e4a4-0fa1-6cd3-4b9f6892d1ad@linux.ee Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-08-15Merge tag 'block-5.9-2020-08-14' of git://git.kernel.dk/linux-blockLinus Torvalds
Pull block fixes from Jens Axboe: "A few fixes on the block side of things: - Discard granularity fix (Coly) - rnbd cleanups (Guoqing) - md error handling fix (Dan) - md sysfs fix (Junxiao) - Fix flush request accounting, which caused an IO slowdown for some configurations (Ming) - Properly propagate loop flag for partition scanning (Lennart)" * tag 'block-5.9-2020-08-14' of git://git.kernel.dk/linux-block: block: fix double account of flush request's driver tag loop: unset GENHD_FL_NO_PART_SCAN on LOOP_CONFIGURE rnbd: no need to set bi_end_io in rnbd_bio_map_kern rnbd: remove rnbd_dev_submit_io md-cluster: Fix potential error pointer dereference in resize_bitmaps() block: check queue's limits.discard_granularity in __blkdev_issue_discard() md: get sysfs entry after redundancy attr group create
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