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f2fs: set cached_en after checking finally

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This patch relocates cached_en not only to be covered by spin_lock, but also
to set once after checking out completely.

Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2015-06-22 18:22:38 -07:00
parent cbe91923a9
commit 244f4fc1c5
1 changed files with 4 additions and 5 deletions
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9
fs/f2fs/data.c
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@ -453,14 +453,12 @@ static struct extent_node *__lookup_extent_tree(struct extent_tree *et,
while (node) {
en = rb_entry(node, struct extent_node, rb_node);
if (fofs < en->ei.fofs) {
if (fofs < en->ei.fofs)
node = node->rb_left;
} else if (fofs >= en->ei.fofs + en->ei.len) {
else if (fofs >= en->ei.fofs + en->ei.len)
node = node->rb_right;
} else {
et->cached_en = en;
else
return en;
}
}
return NULL;
}
@ -625,6 +623,7 @@ static bool f2fs_lookup_extent_tree(struct inode *inode, pgoff_t pgofs,
spin_lock(&sbi->extent_lock);
if (!list_empty(&en->list))
list_move_tail(&en->list, &sbi->extent_list);
et->cached_en = en;
spin_unlock(&sbi->extent_lock);
stat_inc_read_hit(sbi->sb);
}