Messages in this thread Patch in this message | | | From | Peter Senna Tschudin <> | Subject | [PATCH 1/9] drivers/block/aoe/aoecmd.c: Remove useless kfree | Date | Wed, 12 Sep 2012 17:06:39 +0200 |
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From: Peter Senna Tschudin <peter.senna@gmail.com>
Remove useless kfree() and clean up code related to the removal.
The semantic patch that finds this problem is as follows: (http://coccinelle.lip6.fr/)
// <smpl> @r exists@ position p1,p2; expression x; @@
if (x@p1 == NULL) { ... kfree@p2(x); ... return ...; }
@unchanged exists@ position r.p1,r.p2; expression e <= r.x,x,e1; iterator I; statement S; @@
if (x@p1 == NULL) { ... when != I(x,...) S when != e = e1 when != e += e1 when != e -= e1 when != ++e when != --e when != e++ when != e-- when != &e kfree@p2(x); ... return ...; }
@ok depends on unchanged exists@ position any r.p1; position r.p2; expression x; @@
... when != true x@p1 == NULL kfree@p2(x);
@depends on !ok && unchanged@ position r.p2; expression x; @@
*kfree@p2(x); // </smpl>
Signed-off-by: Peter Senna Tschudin <peter.senna@gmail.com>
--- drivers/block/aoe/aoecmd.c | 1 - 1 file changed, 1 deletion(-)
diff --git a/drivers/block/aoe/aoecmd.c b/drivers/block/aoe/aoecmd.c index 5461faa..cbb0521 100644 --- a/drivers/block/aoe/aoecmd.c +++ b/drivers/block/aoe/aoecmd.c @@ -1257,7 +1257,6 @@ addtgt(struct aoedev *d, char *addr, ulong nframes) } t = kcalloc(1, sizeof *t, GFP_ATOMIC); if (!t) { - kfree(t); printk(KERN_INFO "aoe: cannot allocate memory to add target\n"); return NULL; }
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