From: Olof Johansson <olof@lixom.net>
Date: Mon, 28 Apr 2008 09:16:32 +0000 (-0700)
Subject: fatfs: fix build warning with 64k PAGE_SIZE
X-Git-Tag: v2.6.26-rc1~720
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=9f354858b8ea29e969b82dd96caea376157d76ca;p=karo-tx-linux.git

fatfs: fix build warning with 64k PAGE_SIZE

Annoying gcc warning:

fs/fat/inode.c: In function 'fat_fill_super':
fs/fat/inode.c:1222: warning: comparison is always false due to limited range of data type

Change it to compare with 4K instead of PAGE_CACHE_SIZE, as suggested
by OGAWA-san.

[FAT spec says: logical_sector_size should be 512, 1024, 2048 4096]
So, at least for now, we limit it to 4096.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index bf918929e793..5f522a55b596 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -1226,7 +1226,7 @@ int fat_fill_super(struct super_block *sb, void *data, int silent,
 		le16_to_cpu(get_unaligned((__le16 *)&b->sector_size));
 	if (!is_power_of_2(logical_sector_size)
 	    || (logical_sector_size < 512)
-	    || (PAGE_CACHE_SIZE < logical_sector_size)) {
+	    || (logical_sector_size > 4096)) {
 		if (!silent)
 			printk(KERN_ERR "FAT: bogus logical sector size %u\n",
 			       logical_sector_size);