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[PATCH] md: define and use safe_put_page for md

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md sometimes call put_page on NULL pointers (treating it like kfree).  This is
not safe, so define and use a 'safe_put_page' which checks for NULL.

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
NeilBrown 2006-01-06 00:20:40 -08:00 • committed by Linus Torvalds
parent 7dd5d34c6c
commit 1345b1d8ad
5 changed files with 15 additions and 12 deletions
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5
include/linux/raid/md_k.h
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@ -324,5 +324,10 @@ do { \
__wait_event_lock_irq(wq, condition, lock, cmd); \
} while (0)
static inline void safe_put_page(struct page *p)
{
if (p) put_page(p);
}
#endif