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Message-Id: <1424285300-14431-1-git-send-email-kuleshovmail@gmail.com>
Date: Thu, 19 Feb 2015 00:48:20 +0600
From: Alexander Kuleshov <kuleshovmail@...il.com>
To: OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
Cc: linux-kernel@...r.kernel.org,
Alexander Kuleshov <kuleshovmail@...il.com>
Subject: [PATCH] fs/fat: calculate checksum in a loop instead of directly calculating
Signed-off-by: Alexander Kuleshov <kuleshovmail@...il.com>
---
fs/fat/fat.h | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/fs/fat/fat.h b/fs/fat/fat.h
index 64e295e..1a5080b 100644
--- a/fs/fat/fat.h
+++ b/fs/fat/fat.h
@@ -207,12 +207,12 @@ static inline void fat_save_attrs(struct inode *inode, u8 attrs)
static inline unsigned char fat_checksum(const __u8 *name)
{
+ u8 i;
unsigned char s = name[0];
- s = (s<<7) + (s>>1) + name[1]; s = (s<<7) + (s>>1) + name[2];
- s = (s<<7) + (s>>1) + name[3]; s = (s<<7) + (s>>1) + name[4];
- s = (s<<7) + (s>>1) + name[5]; s = (s<<7) + (s>>1) + name[6];
- s = (s<<7) + (s>>1) + name[7]; s = (s<<7) + (s>>1) + name[8];
- s = (s<<7) + (s>>1) + name[9]; s = (s<<7) + (s>>1) + name[10];
+
+ for (i = 1; i < 11; i++)
+ s = (s << 7) + (s >> 1) + name[i];
+
return s;
}
--
2.3.0.80.g18d0fec
--
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