[PATCH] Allow NULL pointers in percpu_free

The patch (as824b) makes percpu_free() ignore NULL arguments, as one would
expect for a deallocation routine.  (Note that free_percpu is #defined as
percpu_free in include/linux/percpu.h.) A few callers are updated to remove
now-unneeded tests for NULL.  A few other callers already seem to assume
that passing a NULL pointer to percpu_free() is okay!

The patch also removes an unnecessary NULL check in percpu_depopulate().

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 2 insertions, 4 deletions

diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index 87c8f54872b7..e5cd83b2205d 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -720,10 +720,8 @@ snmp6_mib_free(void *ptr[2])
 {
         if (ptr == NULL)
                 return;
-        if (ptr[0])
-                free_percpu(ptr[0]);
-        if (ptr[1])
-                free_percpu(ptr[1]);
+        free_percpu(ptr[0]);
+        free_percpu(ptr[1]);
         ptr[0] = ptr[1] = NULL;
 }