btrfs: Make btrfs_find_name_in_ext_backref return struct btrfs_inode_extref

btrfs_find_name_in_ext_backref returns either 0/1 depending on whether it
found a backref for the given name. If it returns true then the actual
inode_ref struct is returned in one of its parameters. That's pointless,
instead refactor the function such that it returns either a pointer
to the btrfs_inode_extref or NULL it it didn't find anything. This
streamlines the function calling convention.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

1 files changed, 6 insertions, 7 deletions

diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index 7a7ae33bea51..7a0e3f8dec5c 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -968,7 +968,7 @@ static noinline int backref_in_log(struct btrfs_root *log,
                 if (btrfs_find_name_in_ext_backref(path->nodes[0],
                                                    path->slots[0],
                                                    ref_objectid,
-                                                   name, namelen, NULL))
+                                                   name, namelen))
                         match = 1;
 
                 goto out;
@@ -1267,9 +1267,9 @@ again:
                         goto out;
 
                 if (key->type == BTRFS_INODE_EXTREF_KEY)
-                        ret = btrfs_find_name_in_ext_backref(log_eb, log_slot,
-                                                             parent_id, name,
-                                                             namelen, NULL);
+                        ret = !!btrfs_find_name_in_ext_backref(log_eb, log_slot,
+                                                               parent_id, name,
+                                                               namelen);
                 else
                         ret = !!btrfs_find_name_in_backref(log_eb, log_slot,
                                                            name, namelen);
@@ -1334,9 +1334,8 @@ static int btrfs_inode_ref_exists(struct inode *inode, struct inode *dir,
                 goto out;
         }
         if (key.type == BTRFS_INODE_EXTREF_KEY)
-                ret = btrfs_find_name_in_ext_backref(path->nodes[0],
-                                                     path->slots[0], parent_id,
-                                                     name, namelen, NULL);
+                ret = !!btrfs_find_name_in_ext_backref(path->nodes[0],
+                                path->slots[0], parent_id, name, namelen);
         else
                 ret = !!btrfs_find_name_in_backref(path->nodes[0], path->slots[0],
                                                    name, namelen);