linux-kernel - [063/115] klist: Fix object alignment on 64-bit.

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Message-Id: <20110216014700.587884093@clark.kroah.org>
Date:	Tue, 15 Feb 2011 17:45:29 -0800
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	"David S. Miller" <davem@...emloft.net>,
	Jesper Nilsson <jesper.nilsson@...s.com>
Subject: [063/115] klist: Fix object alignment on 64-bit.

2.6.32-longterm review patch.  If anyone has any objections, please let us know.

------------------

From: David Miller <davem@...emloft.net>

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@...emloft.net>
Acked-by: Jesper Nilsson <jesper.nilsson@...s.com>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 include/linux/klist.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- 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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