ocfs2: Use BUG_ON

if (...) BUG(); should be replaced with BUG_ON(...) when the test has no
side-effects to allow a definition of BUG_ON that drops the code completely.

The semantic patch that makes this change is as follows:
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@ disable unlikely @ expression E,f; @@

(
  if (<... f(...) ...>) { BUG(); }
|
- if (unlikely(E)) { BUG(); }
+ BUG_ON(E);
)

@@ expression E,f; @@

(
  if (<... f(...) ...>) { BUG(); }
|
- if (E) { BUG(); }
+ BUG_ON(E);
)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>

fs/ocfs2/alloc.c

@@ -1029,8 +1029,7 @@ static void ocfs2_rotate_leaf(struct ocfs2_extent_list *el,
 	BUG_ON(!next_free);
 
 	/* The tree code before us didn't allow enough room in the leaf. */
-	if (el->l_next_free_rec == el->l_count && !has_empty)
-		BUG();
+	BUG_ON(el->l_next_free_rec == el->l_count && !has_empty);
 
 	/*
 	 * The easiest way to approach this is to just remove the

fs/ocfs2/journal.c

@@ -717,8 +717,7 @@ int ocfs2_journal_load(struct ocfs2_journal *journal, int local)
 
 	mlog_entry_void();
 
-	if (!journal)
-		BUG();
+	BUG_ON(!journal);
 
 	osb = journal->j_osb;