AcoSail/kernel_optimize_test
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Btrfs: remove unnecessary code in btree_get_extent()

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Unnecessary lookup_extent_mapping() is removed because an error is
returned to the caller.
This patch was made based on the advice from Stefan Behrens, thanks.

Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com>
This commit is contained in:
Tsutomu Itoh 2012-09-13 03:32:54 -06:00 committed by Chris Mason
parent 0433f20d43
commit b4f359ab06
1 changed files with 1 additions and 7 deletions
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8
fs/btrfs/disk-io.c
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@ -217,16 +217,10 @@ static struct extent_map *btree_get_extent(struct inode *inode,
write_lock(&em_tree->lock);
ret = add_extent_mapping(em_tree, em);
if (ret == -EEXIST) {
u64 failed_start = em->start;
u64 failed_len = em->len;
free_extent_map(em);
em = lookup_extent_mapping(em_tree, start, len);
if (!em) {
lookup_extent_mapping(em_tree, failed_start,
failed_len);
if (!em)
em = ERR_PTR(-EIO);
}
} else if (ret) {
free_extent_map(em);
em = ERR_PTR(ret);