[SPARC64]: Disable preemption during flush_tlb_pending().
A context switch will force a call to flush_tlb_pending() (via switch_to()), so if we test tlb_nr to be non-zero, then sleep, it would become zero and later back at the original context we'll pass zero down into the TLB flushing code which should never see a nr argument of zero. Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -8,6 +8,7 @@
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#include <linux/percpu.h>
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#include <linux/mm.h>
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#include <linux/swap.h>
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#include <linux/preempt.h>
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#include <asm/pgtable.h>
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#include <asm/pgalloc.h>
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@ -24,6 +25,8 @@ void flush_tlb_pending(void)
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{
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struct mmu_gather *mp = &__get_cpu_var(mmu_gathers);
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preempt_disable();
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if (mp->tlb_nr) {
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flush_tsb_user(mp);
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@ -38,6 +41,8 @@ void flush_tlb_pending(void)
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}
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mp->tlb_nr = 0;
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}
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preempt_enable();
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}
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void tlb_batch_add(struct mm_struct *mm, unsigned long vaddr, pte_t *ptep, pte_t orig)
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