[PATCH 1/4] drivers/block/xen-blkback/blkback.c: take size of pointed value, not pointer

[Julia Lawall]

From: Julia Lawall <julia@xxxxxxx>

Sizeof a pointer-typed expression returns the size of the pointer, not that
of the pointed data.

The semantic patch that fixes this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression *e;
type T;
identifier f;
@@

f(...,(T)e,...,
-sizeof(e)
+sizeof(*e)
,...)
// </smpl>

Signed-off-by: Julia Lawall <julia@xxxxxxx>

---
 drivers/block/xen-blkback/blkback.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff -u -p a/drivers/block/xen-blkback/blkback.c b/drivers/block/xen-blkback/blkback.c
--- a/drivers/block/xen-blkback/blkback.c
+++ b/drivers/block/xen-blkback/blkback.c
@@ -790,7 +790,7 @@ static int __init xen_blkif_init(void)
 	if (rc)
 		goto failed_init;
 
-	memset(blkbk->pending_reqs, 0, sizeof(blkbk->pending_reqs));
+	memset(blkbk->pending_reqs, 0, sizeof(*blkbk->pending_reqs));
 
 	INIT_LIST_HEAD(&blkbk->pending_free);
 	spin_lock_init(&blkbk->pending_free_lock);

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