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author | Michael Ellerman <mpe@ellerman.id.au> | 2016-05-06 16:46:00 +1000 |
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committer | Michael Ellerman <mpe@ellerman.id.au> | 2016-05-11 21:54:04 +1000 |
commit | 8bbc9b7b001eaab8abf7e9e24edf1bb285c8d825 (patch) | |
tree | 429f0fdd0a78e020be2cbb180c5a05c09a64be1a /arch/powerpc | |
parent | 925e2d1ded80fcc92210c9a9e5009887553dd83f (diff) | |
download | op-kernel-dev-8bbc9b7b001eaab8abf7e9e24edf1bb285c8d825.zip op-kernel-dev-8bbc9b7b001eaab8abf7e9e24edf1bb285c8d825.tar.gz |
powerpc/mm/hash64: Factor out hash preload psize check
Currently we have a check in hash_preload() against the psize, which is
only included when CONFIG_PPC_MM_SLICES is enabled. We want to expand
this check in a subsequent patch, so factor it out to allow that. As a
bonus it removes the #ifdef in the C code.
Unfortunately we can't put this in the existing CONFIG_PPC_MM_SLICES
block because it would require a forward declaration.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc')
-rw-r--r-- | arch/powerpc/mm/hash_utils_64.c | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c index 262082e..fbe747e 100644 --- a/arch/powerpc/mm/hash_utils_64.c +++ b/arch/powerpc/mm/hash_utils_64.c @@ -1322,6 +1322,22 @@ int __hash_page(unsigned long ea, unsigned long msr, unsigned long trap, return hash_page_mm(mm, ea, access, trap, flags); } +#ifdef CONFIG_PPC_MM_SLICES +static bool should_hash_preload(struct mm_struct *mm, unsigned long ea) +{ + /* We only prefault standard pages for now */ + if (unlikely(get_slice_psize(mm, ea) != mm->context.user_psize)) + return false; + + return true; +} +#else +static bool should_hash_preload(struct mm_struct *mm, unsigned long ea) +{ + return true; +} +#endif + void hash_preload(struct mm_struct *mm, unsigned long ea, unsigned long access, unsigned long trap) { @@ -1334,11 +1350,8 @@ void hash_preload(struct mm_struct *mm, unsigned long ea, BUG_ON(REGION_ID(ea) != USER_REGION_ID); -#ifdef CONFIG_PPC_MM_SLICES - /* We only prefault standard pages for now */ - if (unlikely(get_slice_psize(mm, ea) != mm->context.user_psize)) + if (!should_hash_preload(mm, ea)) return; -#endif DBG_LOW("hash_preload(mm=%p, mm->pgdir=%p, ea=%016lx, access=%lx," " trap=%lx\n", mm, mm->pgd, ea, access, trap); |