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dm space map metadata: use ARRAY_SIZE

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Using the ARRAY_SIZE macro improves the readability of the code.

Found with Coccinelle with the following semantic patch:
@r depends on (org || report)@
type T;
T[] E;
position p;
@@
(
 (sizeof(E)@p /sizeof(*E))
|
 (sizeof(E)@p /sizeof(E[...]))
|
 (sizeof(E)@p /sizeof(T))
)

Signed-off-by: Jérémy Lefaure <jeremy.lefaure@lse.epita.fr>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Jérémy Lefaure 2017-10-01 15:30:49 -04:00 committed by Mike Snitzer
parent 98d82f48f1
commit fbc61291d7
1 changed files with 2 additions and 1 deletions
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3
drivers/md/persistent-data/dm-space-map-metadata.c
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@ -11,6 +11,7 @@
#include <linux/list.h>
#include <linux/slab.h>
#include <linux/device-mapper.h>
#include <linux/kernel.h>
#define DM_MSG_PREFIX "space map metadata"
@ -111,7 +112,7 @@ static bool brb_empty(struct bop_ring_buffer *brb)
static unsigned brb_next(struct bop_ring_buffer *brb, unsigned old)
{
unsigned r = old + 1;
return (r >= (sizeof(brb->bops) / sizeof(*brb->bops))) ? 0 : r;
return r >= ARRAY_SIZE(brb->bops) ? 0 : r;
}
static int brb_push(struct bop_ring_buffer *brb,