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permit mempool_free(NULL)

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Christian Borntraeger points out that mempool_free() doesn't noop when
handed NULL.  This is inconsistent with the other free-like functions
in the kernel.

Signed-off-by: Rusty Russell <[email protected]>
Cc: Christian Borntraeger <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Rusty Russell 2007-07-15 23:42:00 -07:00 • committed by Linus Torvalds
commit c80e7a826c
1 changed files with 3 additions and 0 deletions
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3
mm/mempool.c
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@ -263,6 +263,9 @@ void mempool_free(void *element, mempool_t *pool)
{
unsigned long flags;
if (unlikely(element == NULL))
return;
smp_mb();
if (pool->curr_nr < pool->min_nr) {
spin_lock_irqsave(&pool->lock, flags);