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Revert "vmalloc: remove BUG_ON due to racy counting of VM_LAZY_FREE"

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This reverts commit 21ba0cac4b.
This commit is contained in:
黄涛 2011-07-30 22:26:39 +08:00
parent 5ad16bf39f
commit 993b15ca04
1 changed files with 3 additions and 1 deletions
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4
mm/vmalloc.c
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@ -555,8 +555,10 @@ static void __purge_vmap_area_lazy(unsigned long *start, unsigned long *end,
}
rcu_read_unlock();
if (nr)
if (nr) {
BUG_ON(nr > atomic_read(&vmap_lazy_nr));
atomic_sub(nr, &vmap_lazy_nr);
}
if (nr || force_flush)
flush_tlb_kernel_range(*start, *end);