kfree(NULL) is legal.
Signed-off-by: NJesper Juhl <juhl-lkml@dif.dk>
Acked-by: NStephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>