klist: Fix object alignment on 64-bit.

[David Miller]

Commit c0e69a5bbc6fc74184aa043aadb9a53bc58f953b ("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>

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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