[34-longterm 061/247] klist: Fix object alignment on 64-bit.

From: Paul Gortmaker
Date: Thu Jun 23 2011 - 14:18:38 EST

From: David Miller <davem@xxxxxxxxxxxxx>

This is a commit scheduled for the next v2.6.34 longterm release.
If you see a problem with using this for longterm, please comment.

commit 795abaf1e4e188c4171e3cd3dbb11a9fcacaf505 upstream.

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@xxxxxxxxxxxxx>
Acked-by: Jesper Nilsson <jesper.nilsson@xxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Paul Gortmaker <paul.gortmaker@xxxxxxxxxxxxx>
include/linux/klist.h | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/include/linux/klist.h b/include/linux/klist.h
index e91a4e5..a370ce5 100644
--- a/include/linux/klist.h
+++ b/include/linux/klist.h
@@ -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), \

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