fs/btrfs: drop if around WARN_ON

Just use WARN_ON rather than an if containing only WARN_ON(1).

A simplified version of the semantic patch that makes this transformation
is as follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
expression e;
@@
- if (e) WARN_ON(1);
+ WARN_ON(e);
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Reviewed-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>

diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index 208d8aa..a321952 100644 (file)
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -890,8 +890,7 @@ again:
        while (!list_empty(&prefs)) {
                ref = list_first_entry(&prefs, struct __prelim_ref, list);
                list_del(&ref->list);
-               if (ref->count < 0)
-                       WARN_ON(1);
+               WARN_ON(ref->count < 0);
                if (ref->count && ref->root_id && ref->parent == 0) {
                        /* no parent == root of tree */
                        ret = ulist_add(roots, ref->root_id, 0, GFP_NOFS);

diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 0e4adb0..5c2cf99 100644 (file)
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -1464,10 +1464,8 @@ int btrfs_realloc_node(struct btrfs_trans_handle *trans,
        if (cache_only && parent_level != 1)
                return 0;
 
-       if (trans->transaction != root->fs_info->running_transaction)
-               WARN_ON(1);
-       if (trans->transid != root->fs_info->generation)
-               WARN_ON(1);
+       WARN_ON(trans->transaction != root->fs_info->running_transaction);
+       WARN_ON(trans->transid != root->fs_info->generation);
 
        parent_nritems = btrfs_header_nritems(parent);
        blocksize = btrfs_level_size(root, parent_level - 1);
@@ -3398,8 +3396,7 @@ static noinline int __push_leaf_right(struct btrfs_trans_handle *trans,
        if (push_items == 0)
                goto out_unlock;
 
-       if (!empty && push_items == left_nritems)
-               WARN_ON(1);
+       WARN_ON(!empty && push_items == left_nritems);
 
        /* push left to right */
        right_nritems = btrfs_header_nritems(right);

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 6dca345..e8733fa 100644 (file)
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -1675,8 +1675,7 @@ static noinline int add_pending_csums(struct btrfs_trans_handle *trans,
 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
                              struct extent_state **cached_state)
 {
-       if ((end & (PAGE_CACHE_SIZE - 1)) == 0)
-               WARN_ON(1);
+       WARN_ON((end & (PAGE_CACHE_SIZE - 1)) == 0);
        return set_extent_delalloc(&BTRFS_I(inode)->io_tree, start, end,
                                   cached_state, GFP_NOFS);
 }