The advantage of kcalloc is, that will prevent integer overflows which could result from the multiplication of number of elements and size and it is also a bit nicer to read.
The semantic patch that makes this change is available in https://lkml.org/lkml/2011/11/25/107 Signed-off-by: Thomas Meyer <tho...@m3y3r.de> --- diff -u -p a/drivers/media/video/stk-webcam.c b/drivers/media/video/stk-webcam.c --- a/drivers/media/video/stk-webcam.c 2011-11-13 11:07:31.543568623 +0100 +++ b/drivers/media/video/stk-webcam.c 2011-11-28 19:58:06.822415120 +0100 @@ -377,8 +377,8 @@ static int stk_prepare_iso(struct stk_ca if (dev->isobufs) STK_ERROR("isobufs already allocated. Bad\n"); else - dev->isobufs = kzalloc(MAX_ISO_BUFS * sizeof(*dev->isobufs), - GFP_KERNEL); + dev->isobufs = kcalloc(MAX_ISO_BUFS, sizeof(*dev->isobufs), + GFP_KERNEL); if (dev->isobufs == NULL) { STK_ERROR("Unable to allocate iso buffers\n"); return -ENOMEM; diff -u -p a/drivers/media/video/v4l2-ctrls.c b/drivers/media/video/v4l2-ctrls.c --- a/drivers/media/video/v4l2-ctrls.c 2011-11-28 19:36:47.613437745 +0100 +++ b/drivers/media/video/v4l2-ctrls.c 2011-11-28 19:58:10.342457254 +0100 @@ -1108,8 +1108,8 @@ int v4l2_ctrl_handler_init(struct v4l2_c INIT_LIST_HEAD(&hdl->ctrls); INIT_LIST_HEAD(&hdl->ctrl_refs); hdl->nr_of_buckets = 1 + nr_of_controls_hint / 8; - hdl->buckets = kzalloc(sizeof(hdl->buckets[0]) * hdl->nr_of_buckets, - GFP_KERNEL); + hdl->buckets = kcalloc(hdl->nr_of_buckets, sizeof(hdl->buckets[0]), + GFP_KERNEL); hdl->error = hdl->buckets ? 0 : -ENOMEM; return hdl->error; } -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
