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[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>
This commit is contained in:
David S. Miller 2006-02-23 21:40:15 -08:00
parent a0663a79ad
commit 77b838fa1e
1 changed files with 3 additions and 2 deletions
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5
arch/sparc64/mm/tsb.c
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@ -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);
}