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Btrfs: don't wait on uptodate buffers on read

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Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2007-04-03 11:43:19 -04:00 committed by David Woodhouse
parent 2da566edd8
commit 9d64272cd3
1 changed files with 3 additions and 0 deletions
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3
fs/btrfs/disk-io.c
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@ -214,6 +214,8 @@ struct buffer_head *read_tree_block(struct btrfs_root *root, u64 blocknr)
bh = btrfs_find_create_tree_block(root, blocknr);
if (!bh)
return bh;
if (buffer_uptodate(bh))
goto uptodate;
lock_buffer(bh);
if (!buffer_uptodate(bh)) {
get_bh(bh);
@ -226,6 +228,7 @@ struct buffer_head *read_tree_block(struct btrfs_root *root, u64 blocknr)
} else {
unlock_buffer(bh);
}
uptodate:
if (check_tree_block(root, bh))
BUG();
return bh;