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Subject[PATCH 11/18] dm space map metadata: use ARRAY_SIZE
Date
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>
---
drivers/md/persistent-data/dm-space-map-metadata.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/md/persistent-data/dm-space-map-metadata.c b/drivers/md/persistent-data/dm-space-map-metadata.c
index 4aed69d9dd17..aec449243966 100644
--- a/drivers/md/persistent-data/dm-space-map-metadata.c
+++ b/drivers/md/persistent-data/dm-space-map-metadata.c
@@ -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,
--
2.14.1
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