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nixpkgs/pkgs/os-specific/linux/kernel/btrfs-fix-deadlock.patch

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From 9c4f61f01d269815bb7c37be3ede59c5587747c6 Mon Sep 17 00:00:00 2001
From: David Sterba <dsterba@suse.cz>
Date: Fri, 2 Jan 2015 19:12:57 +0100
Subject: btrfs: simplify insert_orphan_item
We can search and add the orphan item in one go,
btrfs_insert_orphan_item will find out if the item already exists.
Signed-off-by: David Sterba <dsterba@suse.cz>
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index 5be45c1..25a1c36 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -1254,21 +1254,13 @@ out:
}
static int insert_orphan_item(struct btrfs_trans_handle *trans,
- struct btrfs_root *root, u64 offset)
+ struct btrfs_root *root, u64 ino)
{
int ret;
- struct btrfs_path *path;
-
- path = btrfs_alloc_path();
- if (!path)
- return -ENOMEM;
- ret = btrfs_find_item(root, path, BTRFS_ORPHAN_OBJECTID,
- offset, BTRFS_ORPHAN_ITEM_KEY, NULL);
- if (ret > 0)
- ret = btrfs_insert_orphan_item(trans, root, offset);
-
- btrfs_free_path(path);
+ ret = btrfs_insert_orphan_item(trans, root, ino);
+ if (ret == -EEXIST)
+ ret = 0;
return ret;
}
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