klist: Fix object alignment on 64-bit.
David Miller [Mon, 14 Feb 2011 00:37:07 +0000 (16:37 -0800)]
Commit c0e69a5bbc6f ("klist.c: bit 0 in pointer can't be used as flag")
intended to make sure that all klist objects were at least pointer size
aligned, but used the constant "4" which only works on 32-bit.

Use "sizeof(void *)" which is correct in all cases.

Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: stable <stable@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

include/linux/klist.h

index e91a4e5..a370ce5 100644 (file)
@@ -22,7 +22,7 @@ struct klist {
        struct list_head        k_list;
        void                    (*get)(struct klist_node *);
        void                    (*put)(struct klist_node *);
-} __attribute__ ((aligned (4)));
+} __attribute__ ((aligned (sizeof(void *))));
 
 #define KLIST_INIT(_name, _get, _put)                                  \
        { .k_lock       = __SPIN_LOCK_UNLOCKED(_name.k_lock),           \