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Btrfs: Fix btrfs_drop_extent_cache for skip pinned case 

The check for skip pinned case is wrong, it may breaks the
while loop too soon.

Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Yan, Zheng 2009-11-12 09:36:44 +00:00 committed by Chris Mason
parent 24bbcf0442
commit 55ef689900
1 changed files with 3 additions and 7 deletions
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10
fs/btrfs/file.c
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@ -179,18 +179,14 @@ int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
} }
flags = em->flags; flags = em->flags;
if (skip_pinned && test_bit(EXTENT_FLAG_PINNED, &em->flags)) { if (skip_pinned && test_bit(EXTENT_FLAG_PINNED, &em->flags)) {
if (em->start <= start && if (testend && em->start + em->len >= start + len) {
(!testend || em->start + em->len >= start + len)) {
free_extent_map(em); free_extent_map(em);
write_unlock(&em_tree->lock); write_unlock(&em_tree->lock);
break; break;
} }
if (start < em->start) {
len = em->start - start;
} else {
len = start + len - (em->start + em->len);
start = em->start + em->len; start = em->start + em->len;
} if (testend)
len = start + len - (em->start + em->len);
free_extent_map(em); free_extent_map(em);
write_unlock(&em_tree->lock); write_unlock(&em_tree->lock);
continue; continue;