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btrfs: save irq flags when looking up an ordered extent

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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: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Johannes Thumshirn 2021-02-04 19:22:04 +09:00 committed by David Sterba
parent 08f455593f
commit 24533f6a9a
1 changed files with 3 additions and 2 deletions
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5
fs/btrfs/ordered-data.c
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@ -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;
}