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mm: use ARCH_PKEY_BITS to define VM_PKEY_BITN

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Use the new CONFIG_ARCH_PKEY_BITS to simplify setting these bits
for different architectures.

Signed-off-by: Joey Gouly <joey.gouly@arm.com>

Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-fsdevel@vger.kernel.org
Cc: linux-mm@kvack.org
Acked-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Link: https://lore.kernel.org/r/20240822151113.1479789-4-joey.gouly@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Joey Gouly 2024-08-22 16:10:46 +01:00 committed by Will Deacon
parent 5626f8d45e
commit 9f82f15ddf
2 changed files with 12 additions and 6 deletions
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2
fs/proc/task_mmu.c
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@ -976,7 +976,9 @@ static void show_smap_vma_flags(struct seq_file *m, struct vm_area_struct *vma)
[ilog2(VM_PKEY_BIT0)] = "",
[ilog2(VM_PKEY_BIT1)] = "",
[ilog2(VM_PKEY_BIT2)] = "",
#if VM_PKEY_BIT3
[ilog2(VM_PKEY_BIT3)] = "",
#endif
#if VM_PKEY_BIT4
[ilog2(VM_PKEY_BIT4)] = "",
#endif

16
include/linux/mm.h
View File

@ -330,12 +330,16 @@ extern unsigned int kobjsize(const void *objp);
#endif /* CONFIG_ARCH_USES_HIGH_VMA_FLAGS */
#ifdef CONFIG_ARCH_HAS_PKEYS
# define VM_PKEY_SHIFT VM_HIGH_ARCH_BIT_0
# define VM_PKEY_BIT0 VM_HIGH_ARCH_0 /* A protection key is a 4-bit value */
# define VM_PKEY_BIT1 VM_HIGH_ARCH_1 /* on x86 and 5-bit value on ppc64 */
# define VM_PKEY_BIT2 VM_HIGH_ARCH_2
# define VM_PKEY_BIT3 VM_HIGH_ARCH_3
#ifdef CONFIG_PPC
# define VM_PKEY_SHIFT VM_HIGH_ARCH_BIT_0
# define VM_PKEY_BIT0 VM_HIGH_ARCH_0
# define VM_PKEY_BIT1 VM_HIGH_ARCH_1
# define VM_PKEY_BIT2 VM_HIGH_ARCH_2
#if CONFIG_ARCH_PKEY_BITS > 3
# define VM_PKEY_BIT3 VM_HIGH_ARCH_3
#else
# define VM_PKEY_BIT3 0
#endif
#if CONFIG_ARCH_PKEY_BITS > 4
# define VM_PKEY_BIT4 VM_HIGH_ARCH_4
#else
# define VM_PKEY_BIT4 0