xen-blkfront: Use kcalloc instead of kzalloc to allocate array

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>

diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 351ddeffd430bf094c2dc57e56020ca38476097b..8cb0c27f2654c52f1a6cd8dbc61e87c46f0911af 100644 (file)
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -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;