[PATCH] fat: use sb_find_get_block() instead of sb_getblk()

We don't need to allocate buffer for checking the buffer is uptodate.  This
use sb_find_get_block() instead, and if it returns NULL it's not uptodate.

Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/fs/fat/dir.c b/fs/fat/dir.c
index ba82496..b2a26cd 100644 (file)
--- a/fs/fat/dir.c
+++ b/fs/fat/dir.c
@@ -45,8 +45,8 @@ static inline void fat_dir_readahead(struct inode *dir, sector_t iblock,
        if ((sbi->fat_bits != 32) && (dir->i_ino == MSDOS_ROOT_INO))
                return;
 
-       bh = sb_getblk(sb, phys);
-       if (bh && !buffer_uptodate(bh)) {
+       bh = sb_find_get_block(sb, phys);
+       if (bh == NULL || !buffer_uptodate(bh)) {
                for (sec = 0; sec < sbi->sec_per_clus; sec++)
                        sb_breadahead(sb, phys + sec);
        }