Nov 13 2008

crypto: md4 – Use ARRAY_SIZE 

Author: Julia Lawall <julia@diku.dk>

ARRAY_SIZE is more concise to use when the size of an array is divided by
the size of its type or the size of its first element.

The semantic patch that makes this change is as follows:
(http://www.emn.fr/x-info/coccinelle/)

// 
@i@
@@

#include 

@depends on i using "paren.iso"@
type T;
T[] E;
@@

- (sizeof(E)/sizeof(T))
+ ARRAY_SIZE(E)
// 

Signed-off-by: Julia Lawall 
Signed-off-by: Herbert Xu 

---
 crypto/md4.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
 
diff --git a/crypto/md4.c b/crypto/md4.c
index 3c19aa0..a143c4a 100644
--- a/crypto/md4.c
+++ b/crypto/md4.c
@@ -148,7 +148,7 @@ static void md4_transform(u32 *hash, u32 const *in)
 
 static inline void md4_transform_helper(struct md4_ctx *ctx)
 {
-	le32_to_cpu_array(ctx->block, sizeof(ctx->block) / sizeof(u32));
+	le32_to_cpu_array(ctx->block, ARRAY_SIZE(ctx->block));
 	md4_transform(ctx->hash, ctx->block);
 }
 
@@ -214,7 +214,7 @@ static void md4_final(struct crypto_tfm *tfm, u8 *out)
 	le32_to_cpu_array(mctx->block, (sizeof(mctx->block) -
 	                  sizeof(u64)) / sizeof(u32));
 	md4_transform(mctx->hash, mctx->block);
-	cpu_to_le32_array(mctx->hash, sizeof(mctx->hash) / sizeof(u32));
+	cpu_to_le32_array(mctx->hash, ARRAY_SIZE(mctx->hash));
 	memcpy(out, mctx->hash, sizeof(mctx->hash));
 	memset(mctx, 0, sizeof(*mctx));
 }

qlambert