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authorHugh Dickins <hugh@veritas.com>2005-11-23 13:37:39 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-23 16:08:38 -0800
commit01edcd891c3e9f4bb992ff2ceb69836bf76f8ddf (patch)
tree3b8ab4808220d1caaf3ba34db16917f71b852a08 /arch/powerpc/mm/tlb_64.c
parentcc3327e7dfc16a9a3e164075234c869867a59e45 (diff)
[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.c4
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)