diff options
| author | Hugh Dickins <hugh@veritas.com> | 2005-10-29 18:16:01 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-10-29 21:40:37 -0700 |
| commit | 15a23ffa2fc91cebdac44d4aee994f59d5c28dc0 (patch) | |
| tree | 5006935b29246c1ae07a7abc6a384f6b547293ce /include/asm-arm26 | |
| parent | 7be7a546994f1222b2312fd348da14e16b6b7b42 (diff) | |
[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-arm26')
| -rw-r--r-- | include/asm-arm26/tlb.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/include/asm-arm26/tlb.h b/include/asm-arm26/tlb.h index 1316352a58f..8486b00a679 100644 --- a/include/asm-arm26/tlb.h +++ b/include/asm-arm26/tlb.h @@ -17,13 +17,12 @@ struct mmu_gather { unsigned int avoided_flushes; }; -extern struct mmu_gather mmu_gathers[NR_CPUS]; +DECLARE_PER_CPU(struct mmu_gather, mmu_gathers); static inline struct mmu_gather * tlb_gather_mmu(struct mm_struct *mm, unsigned int full_mm_flush) { - int cpu = smp_processor_id(); - struct mmu_gather *tlb = &mmu_gathers[cpu]; + struct mmu_gather *tlb = &get_cpu_var(mmu_gathers); tlb->mm = mm; tlb->freed = 0; @@ -52,6 +51,8 @@ tlb_finish_mmu(struct mmu_gather *tlb, unsigned long start, unsigned long end) /* keep the page table cache within bounds */ check_pgt_cache(); + + put_cpu_var(mmu_gathers); } |