BUG_ON conversion for fs/reiserfs

This patch converts several if () BUG(); construct to BUG_ON();
which occupies less space, uses unlikely and is safer when
BUG() is disabled. S_ISREG() has no side effects, so the
conversion is safe.

Signed-off-by: Eric Sesterhenn <snakebyte@gmx.de>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
diff --git a/fs/reiserfs/file.c b/fs/reiserfs/file.c
index 41f2436..c093642 100644
--- a/fs/reiserfs/file.c
+++ b/fs/reiserfs/file.c
@@ -38,8 +38,7 @@
 	int err;
 	int jbegin_failure = 0;
 
-	if (!S_ISREG(inode->i_mode))
-		BUG();
+	BUG_ON(!S_ISREG(inode->i_mode));
 
 	/* fast out for when nothing needs to be done */
 	if ((atomic_read(&inode->i_count) > 1 ||
@@ -125,8 +124,7 @@
 	int n_err;
 	int barrier_done;
 
-	if (!S_ISREG(p_s_inode->i_mode))
-		BUG();
+	BUG_ON(!S_ISREG(p_s_inode->i_mode));
 	n_err = sync_mapping_buffers(p_s_inode->i_mapping);
 	reiserfs_write_lock(p_s_inode->i_sb);
 	barrier_done = reiserfs_commit_for_inode(p_s_inode);