From: Peter Senna Tschudin <peter.senna@xxxxxxxxx> 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@xxxxxxxxx> --- drivers/char/mmtimer.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/char/mmtimer.c b/drivers/char/mmtimer.c index 33dc229..3d6c067 100644 --- a/drivers/char/mmtimer.c +++ b/drivers/char/mmtimer.c @@ -826,7 +826,7 @@ static int __init mmtimer_init(void) /* Allocate list of node ptrs to mmtimer_t's */ timers = kzalloc(sizeof(struct mmtimer_node)*maxn, GFP_KERNEL); - if (timers == NULL) { + if (!timers) { printk(KERN_ERR "%s: failed to allocate memory for device\n", MMTIMER_NAME); goto out3; @@ -848,7 +848,6 @@ static int __init mmtimer_init(void) return 0; out3: - kfree(timers); misc_deregister(&mmtimer_miscdev); out2: free_irq(SGI_MMTIMER_VECTOR, NULL); -- To unsubscribe from this list: send the line "unsubscribe kernel-janitors" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
