fs/ext2: 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: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 3 insertions, 4 deletions

diff --git a/fs/ext2/balloc.c b/fs/ext2/balloc.c
index e7b2bafa1dd9..c834f512dce5 100644
--- a/fs/ext2/balloc.c
+++ b/fs/ext2/balloc.c
@@ -245,8 +245,7 @@ restart:
                 prev = rsv;
         }
         printk("Window map complete.\n");
-        if (bad)
-                BUG();
+        BUG_ON(bad);
 }
 #define rsv_window_dump(root, verbose) \
         __rsv_window_dump((root), (verbose), __FUNCTION__)
diff --git a/fs/ext2/dir.c b/fs/ext2/dir.c
index a0995eb2dc23..dd9dbb25eab2 100644
--- a/fs/ext2/dir.c
+++ b/fs/ext2/dir.c
@@ -41,8 +41,8 @@ static inline __le16 ext2_rec_len_to_disk(unsigned len)
 {
         if (len == (1 << 16))
                 return cpu_to_le16(EXT2_MAX_REC_LEN);
-        else if (len > (1 << 16))
-                BUG();
+        else
+                BUG_ON(len > (1 << 16));
         return cpu_to_le16(len);
 }