xen-blkfront: Use kcalloc instead of kzalloc to allocate array
authorThomas Meyer <thomas@m3y3r.de>
Tue, 29 Nov 2011 21:08:00 +0000 (22:08 +0100)
committerKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Fri, 16 Dec 2011 17:36:52 +0000 (12:36 -0500)
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 <thomas@m3y3r.de>
[v1: Seperated the drivers/block/cciss_scsi.c out of this patch]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
drivers/block/xen-blkfront.c

index 351ddef..8cb0c27 100644 (file)
@@ -157,7 +157,7 @@ static int xlbd_reserve_minors(unsigned int minor, unsigned int nr)
        if (end > nr_minors) {
                unsigned long *bitmap, *old;
 
-               bitmap = kzalloc(BITS_TO_LONGS(end) * sizeof(*bitmap),
+               bitmap = kcalloc(BITS_TO_LONGS(end), sizeof(*bitmap),
                                 GFP_KERNEL);
                if (bitmap == NULL)
                        return -ENOMEM;