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Subject[PATCH 08/18] ecryptfs: 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>
---
fs/ecryptfs/crypto.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c
index 7acd57da4f14..2e78e851788e 100644
--- a/fs/ecryptfs/crypto.c
+++ b/fs/ecryptfs/crypto.c
@@ -36,6 +36,7 @@
#include <linux/scatterlist.h>
#include <linux/slab.h>
#include <asm/unaligned.h>
+#include <linux/kernel.h>
#include "ecryptfs_kernel.h"

#define DECRYPT 0
@@ -884,8 +885,7 @@ static int ecryptfs_process_flags(struct ecryptfs_crypt_stat *crypt_stat,
u32 flags;

flags = get_unaligned_be32(page_virt);
- for (i = 0; i < ((sizeof(ecryptfs_flag_map)
- / sizeof(struct ecryptfs_flag_map_elem))); i++)
+ for (i = 0; i < ARRAY_SIZE(ecryptfs_flag_map); i++)
if (flags & ecryptfs_flag_map[i].file_flag) {
crypt_stat->flags |= ecryptfs_flag_map[i].local_flag;
} else
@@ -922,8 +922,7 @@ void ecryptfs_write_crypt_stat_flags(char *page_virt,
u32 flags = 0;
int i;

- for (i = 0; i < ((sizeof(ecryptfs_flag_map)
- / sizeof(struct ecryptfs_flag_map_elem))); i++)
+ for (i = 0; i < ARRAY_SIZE(ecryptfs_flag_map); i++)
if (crypt_stat->flags & ecryptfs_flag_map[i].local_flag)
flags |= ecryptfs_flag_map[i].file_flag;
/* Version is in top 8 bits of the 32-bit flag vector */
--
2.14.1
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