linux-ext4 - [PATCH] ext4/hash.c: remove useless test and assignment in strtohash

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Date:   Thu, 27 Jul 2017 22:53:27 +0200
From:   Damien Guibouret <damien.guibouret@...tition-saving.com>
To:     linux-ext4@...r.kernel.org
Cc:     Damien Guibouret <damien.guibouret@...tition-saving.com>
Subject: [PATCH] ext4/hash.c: remove useless test and assignment in strtohash

On transformation of str to hash, computed value is initialised before
first byte modulo 4. But it is already initialised before entering loop
and after processing last byte modulo 4. So the corresponding test and
initialisation could be removed.

Signed-off-by: Damien Guibouret <damien.guibouret@...tition-saving.com>
---
 fs/ext4/hash.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/fs/ext4/hash.c b/fs/ext4/hash.c
index 38b8a96..00c6dd2 100644
--- a/fs/ext4/hash.c
+++ b/fs/ext4/hash.c
@@ -148,8 +148,6 @@ static void str2hashbuf_signed(const char *msg, int len, __u32 *buf, int num)
 	if (len > num*4)
 		len = num * 4;
 	for (i = 0; i < len; i++) {
-		if ((i % 4) == 0)
-			val = pad;
 		val = ((int) scp[i]) + (val << 8);
 		if ((i % 4) == 3) {
 			*buf++ = val;
@@ -176,8 +174,6 @@ static void str2hashbuf_unsigned(const char *msg, int len, __u32 *buf, int num)
 	if (len > num*4)
 		len = num * 4;
 	for (i = 0; i < len; i++) {
-		if ((i % 4) == 0)
-			val = pad;
 		val = ((int) ucp[i]) + (val << 8);
 		if ((i % 4) == 3) {
 			*buf++ = val;
-- 
2.5.0