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fatfs: fix build warning with 64k PAGE_SIZE

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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>
This commit is contained in:
Olof Johansson 2008-04-28 02:16:32 -07:00 • committed by Linus Torvalds
parent 0607fd0258
commit 9f354858b8
1 changed files with 1 additions and 1 deletions
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2
fs/fat/inode.c
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@ -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)); le16_to_cpu(get_unaligned((__le16 *)&b->sector_size));
if (!is_power_of_2(logical_sector_size) if (!is_power_of_2(logical_sector_size)
|| (logical_sector_size < 512) || (logical_sector_size < 512)
|| (PAGE_CACHE_SIZE < logical_sector_size)) { || (logical_sector_size > 4096)) {
if (!silent) if (!silent)
printk(KERN_ERR "FAT: bogus logical sector size %u\n", printk(KERN_ERR "FAT: bogus logical sector size %u\n",
logical_sector_size); logical_sector_size);