linux-kernel - [PATCH 2/7] Make shrink_dcache_for_umount_subtree() use ANNOTATED

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Message-ID: <20111216141407.24668.58875.stgit@warthog.procyon.org.uk>
Date:	Fri, 16 Dec 2011 14:14:07 +0000
From:	David Howells <dhowells@...hat.com>
To:	linux-arch@...r.kernel.org, mingo@...e.hu
Cc:	linux-kernel@...r.kernel.org, David Howells <dhowells@...hat.com>
Subject: [PATCH 2/7] Make shrink_dcache_for_umount_subtree() use
 ANNOTATED_BUG()

Make shrink_dcache_for_umount_subtree() use ANNOTATED_BUG() rather than doing
printk() then BUG() so that the annotation appears _after_ the "cut here" line
instead of before it.

Signed-off-by: David Howells <dhowells@...hat.com>
---

 fs/dcache.c |    9 ++++-----
 1 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/fs/dcache.c b/fs/dcache.c
index 89509b5..4083c50 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -37,6 +37,7 @@
 #include <linux/rculist_bl.h>
 #include <linux/prefetch.h>
 #include <linux/ratelimit.h>
+#include <linux/bug.h>
 #include "internal.h"
 
 /*
@@ -889,9 +890,9 @@ static void shrink_dcache_for_umount_subtree(struct dentry *dentry)
 			dentry_lru_prune(dentry);
 			__d_shrink(dentry);
 
-			if (dentry->d_count != 0) {
-				printk(KERN_ERR
-				       "BUG: Dentry %p{i=%lx,n=%s}"
+			if (unlikely(dentry->d_count != 0))
+				ANNOTATED_BUG(
+				       "Dentry %p{i=%lx,n=%s}"
 				       " still in use (%d)"
 				       " [unmount of %s %s]\n",
 				       dentry,
@@ -901,8 +902,6 @@ static void shrink_dcache_for_umount_subtree(struct dentry *dentry)
 				       dentry->d_count,
 				       dentry->d_sb->s_type->name,
 				       dentry->d_sb->s_id);
-				BUG();
-			}
 
 			if (IS_ROOT(dentry)) {
 				parent = NULL;

--
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