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authorKirill A. Shutemov <kirill.shutemov@linux.intel.com>2018-02-14 14:16:48 +0300
committerIngo Molnar <mingo@kernel.org>2018-02-14 13:11:13 +0100
commitb83ce5ee91471d19c403ff91227204fb37c95fb2 (patch)
tree530830b459b756cf431c27cc2000b43b58cdd558 /mm/zsmalloc.c
parent116fef6408599dd6ff6996235c50aa692e9b5631 (diff)
x86/mm/64: Make __PHYSICAL_MASK_SHIFT always 52
__PHYSICAL_MASK_SHIFT is used to define the mask that helps to extract physical address from a page table entry. Although real physical address space available may differ between machines, it's safe to use 52 as __PHYSICAL_MASK_SHIFT. Unused bits above log2(MAXPHYADDR) up to bit 51 are reserved and must be 0. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@suse.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/20180214111656.88514-2-kirill.shutemov@linux.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'mm/zsmalloc.c')
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