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| author |   Hugh Dickins <hugh@veritas.com> | 2005-11-23 13:37:39 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@g5.osdl.org> | 2005-11-23 16:08:38 -0800 |
| commit | 01edcd891c3e9f4bb992ff2ceb69836bf76f8ddf (patch) | |
| tree | 3b8ab4808220d1caaf3ba34db16917f71b852a08 /arch/powerpc/mm/tlb_64.c | |
| parent | [PATCH] mm: unbloat get_futex_key (diff) | |
| download | linux-dev-01edcd891c3e9f4bb992ff2ceb69836bf76f8ddf.tar.xz linux-dev-01edcd891c3e9f4bb992ff2ceb69836bf76f8ddf.zip | |
[PATCH] mm: powerpc ptlock comments
Update comments (only) on page_table_lock and mmap_sem in arch/powerpc.
Removed the comment on page_table_lock from hash_huge_page: since it's no
longer taking page_table_lock itself, it's irrelevant whether others are; but
how it is safe (even against huge file truncation?) I can't say.
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/powerpc/mm/tlb_64.c')
| -rw-r--r-- | arch/powerpc/mm/tlb_64.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/powerpc/mm/tlb_64.c b/arch/powerpc/mm/tlb_64.c index 53e31b834ace..859d29a0cac5 100644 --- a/arch/powerpc/mm/tlb_64.c +++ b/arch/powerpc/mm/tlb_64.c @@ -95,7 +95,7 @@ static void pte_free_submit(struct pte_freelist_batch *batch) void pgtable_free_tlb(struct mmu_gather *tlb, pgtable_free_t pgf) { - /* This is safe as we are holding page_table_lock */ + /* This is safe since tlb_gather_mmu has disabled preemption */ cpumask_t local_cpumask = cpumask_of_cpu(smp_processor_id()); struct pte_freelist_batch **batchp = &__get_cpu_var(pte_freelist_cur); @@ -206,7 +206,7 @@ void __flush_tlb_pending(struct ppc64_tlb_batch *batch) void pte_free_finish(void) { - /* This is safe as we are holding page_table_lock */ + /* This is safe since tlb_gather_mmu has disabled preemption */ struct pte_freelist_batch **batchp = &__get_cpu_var(pte_freelist_cur); if (*batchp == NULL) |