+ fs-ocfs2-use-bug_on.patch added to -mm tree

+ fs-ocfs2-use-bug_on.patch added to -mm tree

[akpm]

The patch titled
     fs/ocfs2: Use BUG_ON
has been added to the -mm tree.  Its filename is
     fs-ocfs2-use-bug_on.patch

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*** Remember to use Documentation/SubmitChecklist when testing your code ***

See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this

The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/

------------------------------------------------------
Subject: fs/ocfs2: Use BUG_ON
From: Julia Lawall <julia@diku.dk>

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>
---

 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;
 
_

Patches currently in -mm which might be from julia@diku.dk are

sound-use-bug_on.patch
git-hid.patch
git-net.patch
drivers-net-mv643xx_ethc-use-field_sizeof.patch
fs-ocfs2-use-bug_on.patch
s390-use-div_round_up.patch
drivers-block-viodasdc-use-field_sizeof.patch
usb-use-div_round_up.patch
fs-affs-filec-use-bug_on.patch
fbdev-use-div_round_up-or-roundup.patch
fs-ext2-use-bug_on.patch
fs-ext3-use-bug_on.patch
fs-ext4-use-bug_on.patch