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| author | David S. Miller <davem@sunset.davemloft.net> | 2006-02-23 21:40:15 -0800 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-03-20 01:14:01 -0800 |
| commit | 77b838fa1ef0ab02f75afc09834c60d87b86772f (patch) | |
| tree | 810bce2bf584b6259bd516daa0391cf1b3487ab4 /arch | |
| parent | a0663a79ad4faebe1db4a56e2e767b120b12333a (diff) | |
| download | op-kernel-dev-77b838fa1ef0ab02f75afc09834c60d87b86772f.zip op-kernel-dev-77b838fa1ef0ab02f75afc09834c60d87b86772f.tar.gz | |
[SPARC64]: destroy_context() needs to disable interrupts.
get_new_mmu_context() can be invoked from interrupt context
now for the new SMP version wrap handling.
So disable interrupt while taking ctx_alloc_lock in destroy_context()
so we don't deadlock.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/sparc64/mm/tsb.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/sparc64/mm/tsb.c b/arch/sparc64/mm/tsb.c index 353cb06..534ac28 100644 --- a/arch/sparc64/mm/tsb.c +++ b/arch/sparc64/mm/tsb.c @@ -373,6 +373,7 @@ int init_new_context(struct task_struct *tsk, struct mm_struct *mm) void destroy_context(struct mm_struct *mm) { unsigned long size = mm->context.tsb_nentries * sizeof(struct tsb); + unsigned long flags; free_pages((unsigned long) mm->context.tsb, get_order(size)); @@ -383,12 +384,12 @@ void destroy_context(struct mm_struct *mm) mm->context.tsb = NULL; mm->context.tsb_reg_val = 0UL; - spin_lock(&ctx_alloc_lock); + spin_lock_irqsave(&ctx_alloc_lock, flags); if (CTX_VALID(mm->context)) { unsigned long nr = CTX_NRBITS(mm->context); mmu_context_bmap[nr>>6] &= ~(1UL << (nr & 63)); } - spin_unlock(&ctx_alloc_lock); + spin_unlock_irqrestore(&ctx_alloc_lock, flags); } |
