From: Julia Lawall 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/) // @ 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); ) // Signed-off-by: Julia Lawall Signed-off-by: Andrew Morton --- fs/ocfs2/alloc.c | 3 +-- fs/ocfs2/journal.c | 3 +-- 2 files changed, 2 insertions(+), 4 deletions(-) diff -puN fs/ocfs2/alloc.c~fs-ocfs2-use-bug_on fs/ocfs2/alloc.c --- a/fs/ocfs2/alloc.c~fs-ocfs2-use-bug_on +++ a/fs/ocfs2/alloc.c @@ -1029,8 +1029,7 @@ static void ocfs2_rotate_leaf(struct ocf 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 diff -puN fs/ocfs2/journal.c~fs-ocfs2-use-bug_on fs/ocfs2/journal.c --- a/fs/ocfs2/journal.c~fs-ocfs2-use-bug_on +++ a/fs/ocfs2/journal.c @@ -586,8 +586,7 @@ int ocfs2_journal_load(struct ocfs2_jour mlog_entry_void(); - if (!journal) - BUG(); + BUG_ON(!journal); osb = journal->j_osb; _