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authorHugh Dickins <hugh@veritas.com>2005-10-29 18:16:01 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-10-29 21:40:37 -0700
commit15a23ffa2fc91cebdac44d4aee994f59d5c28dc0 (patch)
tree5006935b29246c1ae07a7abc6a384f6b547293ce /include/asm-sparc64
parent7be7a546994f1222b2312fd348da14e16b6b7b42 (diff)
downloadop-kernel-dev-15a23ffa2fc91cebdac44d4aee994f59d5c28dc0.zip
op-kernel-dev-15a23ffa2fc91cebdac44d4aee994f59d5c28dc0.tar.gz
[PATCH] mm: tlb_gather_mmu get_cpu_var
tlb_gather_mmu dates from before kernel preemption was allowed, and uses smp_processor_id or __get_cpu_var to find its per-cpu mmu_gather. That works because it's currently only called after getting page_table_lock, which is not dropped until after the matching tlb_finish_mmu. But don't rely on that, it will soon change: now disable preemption internally by proper get_cpu_var in tlb_gather_mmu, put_cpu_var in tlb_finish_mmu. Signed-off-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-sparc64')
-rw-r--r--include/asm-sparc64/tlb.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/include/asm-sparc64/tlb.h b/include/asm-sparc64/tlb.h
index 9baf57d..169309b 100644
--- a/include/asm-sparc64/tlb.h
+++ b/include/asm-sparc64/tlb.h
@@ -44,7 +44,7 @@ extern void flush_tlb_pending(void);
static inline struct mmu_gather *tlb_gather_mmu(struct mm_struct *mm, unsigned int full_mm_flush)
{
- struct mmu_gather *mp = &__get_cpu_var(mmu_gathers);
+ struct mmu_gather *mp = &get_cpu_var(mmu_gathers);
BUG_ON(mp->tlb_nr);
@@ -97,6 +97,8 @@ static inline void tlb_finish_mmu(struct mmu_gather *mp, unsigned long start, un
/* keep the page table cache within bounds */
check_pgt_cache();
+
+ put_cpu_var(mmu_gathers);
}
static inline unsigned int tlb_is_full_mm(struct mmu_gather *mp)
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