[PATCH] make mempool_destroy resilient against NULL pointers.

[Jesper Juhl]

General rule (as I understand it) is that functions that free resources 
should handle being passed NULL pointers - mempool_destroy() will 
currently explode if passed a NULL pointer, the patch below makes it safe 
to pass it NULL.

Signed-off-by: Jesper Juhl <juhl-lkml@xxxxxx>
---

 mempool.c |    2 ++
 1 files changed, 2 insertions(+)


--- linux-2.6.12-rc2-mm2-orig/mm/mempool.c	2005-04-05 21:21:56.000000000 +0200
+++ linux-2.6.12-rc2-mm2/mm/mempool.c	2005-04-09 03:33:58.000000000 +0200
@@ -176,6 +176,8 @@ EXPORT_SYMBOL(mempool_resize);
  */
 void mempool_destroy(mempool_t *pool)
 {
+	if (!pool)
+		return;
 	if (pool->curr_nr != pool->min_nr)
 		BUG();		/* There were outstanding elements */
 	free_pool(pool);


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