linux-kernel - [PATCH] fat: Simplify calc_fat

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Message-Id: <1409664810-31960-1-git-send-email-waydi1@gmail.com>
Date:	Tue,  2 Sep 2014 22:33:30 +0900
From:	Seunghun Lee <waydi1@...il.com>
To:	hirofumi@...l.parknet.co.jp
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	Seunghun Lee <waydi1@...il.com>
Subject: [PATCH] fat: Simplify calc_fat_clusters code

Code for fat12 and fat16/32 can be merged to one.

Signed-off-by: Seunghun Lee <waydi1@...il.com>
---
 fs/fat/inode.c |    7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index 756aead..6992dea 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -1307,12 +1307,9 @@ static unsigned long calc_fat_clusters(struct super_block *sb)
 	struct msdos_sb_info *sbi = MSDOS_SB(sb);
 
 	/* Divide first to avoid overflow */
-	if (sbi->fat_bits != 12) {
-		unsigned long ent_per_sec = sb->s_blocksize * 8 / sbi->fat_bits;
-		return ent_per_sec * sbi->fat_length;
-	}
+	unsigned long ent_per_sec = sb->s_blocksize * 8 / sbi->fat_bits;
 
-	return sbi->fat_length * sb->s_blocksize * 8 / sbi->fat_bits;
+	return ent_per_sec * sbi->fat_length;
 }
 
 static bool fat_bpb_is_zero(struct fat_boot_sector *b)
-- 
1.7.9.5

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