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Btrfs: Use ERR_CAST helpers 

Use ERR_CAST(x) rather than ERR_PTR(PTR_ERR(x)).  The former makes more
clear what is the purpose of the operation, which otherwise looks like a
no-op.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
type T;
T x;
identifier f;
@@

T f (...) { <+...
- ERR_PTR(PTR_ERR(x))
+ x
 ...+> }

@@
expression x;
@@

- ERR_PTR(PTR_ERR(x))
+ ERR_CAST(x)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Cc: Chris Mason <chris.mason@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Julia Lawall 2010-10-29 15:14:23 -04:00 committed by Chris Mason
parent 2354d08fe9
commit d0b678cb0a
2 changed files with 3 additions and 3 deletions
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4
fs/btrfs/extent_map.c
View File

@ -335,7 +335,7 @@ struct extent_map *lookup_extent_mapping(struct extent_map_tree *tree,
goto out;
}
if (IS_ERR(rb_node)) {
em = ERR_PTR(PTR_ERR(rb_node));
em = ERR_CAST(rb_node);
goto out;
}
em = rb_entry(rb_node, struct extent_map, rb_node);
@ -384,7 +384,7 @@ struct extent_map *search_extent_mapping(struct extent_map_tree *tree,
goto out;
}
if (IS_ERR(rb_node)) {
em = ERR_PTR(PTR_ERR(rb_node));
em = ERR_CAST(rb_node);
goto out;
}
em = rb_entry(rb_node, struct extent_map, rb_node);

2
fs/btrfs/super.c
View File

@ -389,7 +389,7 @@ static struct dentry *get_default_root(struct super_block *sb,
find_root:
new_root = btrfs_read_fs_root_no_name(root->fs_info, &location);
if (IS_ERR(new_root))
return ERR_PTR(PTR_ERR(new_root));
return ERR_CAST(new_root);
if (btrfs_root_refs(&new_root->root_item) == 0)
return ERR_PTR(-ENOENT);