diff options
| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2009-06-02 08:07:57 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-06-15 09:40:37 -0700 |
| commit | 9cb18641b3fd86309735fc4e2df14aaf9c50469c (patch) | |
| tree | 6b4c350399e274fd627c39c73218b3ef98bfb18f | |
| parent | b0b1dd413d407ba6879e8286a10c5781f2f2ec5e (diff) | |
ext4: Use a fake block number for delayed new buffer_head
(cherry picked from commit 33b9817e2ae097c7b8d256e3510ac6c54fc6d9d0)
Use a very large unsigned number (~0xffff) as as the fake block number
for the delayed new buffer. The VFS should never try to write out this
number, but if it does, this will make it obvious.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | fs/ext4/inode.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 03be1225944c..57923cc150c6 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -2220,6 +2220,10 @@ static int ext4_da_get_block_prep(struct inode *inode, sector_t iblock, struct buffer_head *bh_result, int create) { int ret = 0; + sector_t invalid_block = ~((sector_t) 0xffff); + + if (invalid_block < ext4_blocks_count(EXT4_SB(inode->i_sb)->s_es)) + invalid_block = ~0; BUG_ON(create == 0); BUG_ON(bh_result->b_size != inode->i_sb->s_blocksize); @@ -2241,7 +2245,7 @@ static int ext4_da_get_block_prep(struct inode *inode, sector_t iblock, /* not enough space to reserve */ return ret; - map_bh(bh_result, inode->i_sb, 0); + map_bh(bh_result, inode->i_sb, invalid_block); set_buffer_new(bh_result); set_buffer_delay(bh_result); } else if (ret > 0) { |