Commit 24533f6a authored by Johannes Thumshirn's avatar Johannes Thumshirn Committed by David Sterba
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btrfs: save irq flags when looking up an ordered extent 



A following patch will add another caller of
btrfs_lookup_ordered_extent(), but from a bio's endio context.

btrfs_lookup_ordered_extent() uses spin_lock_irq() which unconditionally
disables interrupts. Change this to spin_lock_irqsave() so interrupts
aren't disabled and re-enabled unconditionally.

Reviewed-by: default avatarJosef Bacik <josef@toxicpanda.com>
Signed-off-by: default avatarJohannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 08f45559

fs/btrfs/ordered-data.c

+3 −2
Original line number Diff line number Diff line
@@ -767,9 +767,10 @@ struct btrfs_ordered_extent *btrfs_lookup_ordered_extent(struct btrfs_inode *ino 
	struct btrfs_ordered_inode_tree *tree;

	struct rb_node *node;

	struct btrfs_ordered_extent *entry = NULL;

	unsigned long flags;



	tree = &inode->ordered_tree;

	spin_lock_irq(&tree->lock);

	spin_lock_irqsave(&tree->lock, flags);

	node = tree_search(tree, file_offset);

	if (!node)

		goto out;
@@ -780,7 +781,7 @@ struct btrfs_ordered_extent *btrfs_lookup_ordered_extent(struct btrfs_inode *ino 
	if (entry)

		refcount_inc(&entry->refs);

out:

	spin_unlock_irq(&tree->lock);

	spin_unlock_irqrestore(&tree->lock, flags);

	return entry;

}