diff options
| author | Hugh Dickins <hugh@veritas.com> | 2005-10-30 02:16:37 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-10-30 05:40:42 +0100 |
| commit | a7e4705b24e611574e5c23105005ffdff694fd58 (patch) | |
| tree | 891228898aaa599e4f9f0f56e9f7cc6659b1cde7 /arch/cris/arch-v32/mm | |
| parent | [PATCH] mm: parisc pte atomicity (diff) | |
| download | linux-a7e4705b24e611574e5c23105005ffdff694fd58.tar.xz linux-a7e4705b24e611574e5c23105005ffdff694fd58.zip | |
[PATCH] mm: cris v32 mmu_context_lock
The cris v32 switch_mm guards get_mmu_context with next->page_table_lock: good
it's not really SMP yet, since get_mmu_context messes with global variables
affecting other mms. Replace by global mmu_context_lock.
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 'arch/cris/arch-v32/mm')
| -rw-r--r-- | arch/cris/arch-v32/mm/tlb.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/cris/arch-v32/mm/tlb.c b/arch/cris/arch-v32/mm/tlb.c index 8233406798d3..b08a28bb58ab 100644 --- a/arch/cris/arch-v32/mm/tlb.c +++ b/arch/cris/arch-v32/mm/tlb.c @@ -175,6 +175,8 @@ init_new_context(struct task_struct *tsk, struct mm_struct *mm) return 0; } +static DEFINE_SPINLOCK(mmu_context_lock); + /* Called in schedule() just before actually doing the switch_to. */ void switch_mm(struct mm_struct *prev, struct mm_struct *next, @@ -183,10 +185,10 @@ switch_mm(struct mm_struct *prev, struct mm_struct *next, int cpu = smp_processor_id(); /* Make sure there is a MMU context. */ - spin_lock(&next->page_table_lock); + spin_lock(&mmu_context_lock); get_mmu_context(next); cpu_set(cpu, next->cpu_vm_mask); - spin_unlock(&next->page_table_lock); + spin_unlock(&mmu_context_lock); /* * Remember the pgd for the fault handlers. Keep a seperate copy of it |