From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Meyer Subject: [PATCH] Btrfs: Use kcalloc instead of kzalloc to allocate array Date: Tue, 29 Nov 2011 22:08:00 +0100 Message-ID: <1322600880.1534.343.camel@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" To: chris.mason@oracle.com, linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org Return-path: List-ID: 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 --- diff -u -p a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c --- a/fs/btrfs/volumes.c 2011-11-28 19:36:48.113451068 +0100 +++ b/fs/btrfs/volumes.c 2011-11-28 19:48:10.374677247 +0100 @@ -2450,7 +2450,7 @@ static int __btrfs_alloc_chunk(struct bt max_chunk_size = min(div_factor(fs_devices->total_rw_bytes, 1), max_chunk_size); - devices_info = kzalloc(sizeof(*devices_info) * fs_devices->rw_devices, + devices_info = kcalloc(fs_devices->rw_devices, sizeof(*devices_info), GFP_NOFS); if (!devices_info) return -ENOMEM;