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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>
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@ -373,6 +373,7 @@ int init_new_context(struct task_struct *tsk, struct mm_struct *mm)
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void destroy_context(struct mm_struct *mm)
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{
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unsigned long size = mm->context.tsb_nentries * sizeof(struct tsb);
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unsigned long flags;
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free_pages((unsigned long) mm->context.tsb, get_order(size));
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@ -383,12 +384,12 @@ void destroy_context(struct mm_struct *mm)
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mm->context.tsb = NULL;
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mm->context.tsb_reg_val = 0UL;
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spin_lock(&ctx_alloc_lock);
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spin_lock_irqsave(&ctx_alloc_lock, flags);
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if (CTX_VALID(mm->context)) {
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unsigned long nr = CTX_NRBITS(mm->context);
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mmu_context_bmap[nr>>6] &= ~(1UL << (nr & 63));
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}
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spin_unlock(&ctx_alloc_lock);
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spin_unlock_irqrestore(&ctx_alloc_lock, flags);
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}
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