From: Dave Chinner <david@fromorbit.com>
To: xfs@oss.sgi.com
Subject: [PATCH] xfs: inode lockdep annotations broke non-lockdep build
Date: Wed, 19 Aug 2015 20:23:34 +1000 [thread overview]
Message-ID: <1439979814-18934-1-git-send-email-david@fromorbit.com> (raw)
From: Dave Chinner <dchinner@redhat.com>
Fix CONFIG_LOCKDEP=n build, because asserts I put in to ensure we
aren't overrunning lockdep subclasses in commit 0952c81 ("xfs:
clean up inode lockdep annotations") use a define that doesn't
exist when CONFIG_LOCKDEP=n
Only check the subclass limits when lockdep is actually enabled.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
---
fs/xfs/xfs_inode.c | 16 ++++++++++++++--
1 file changed, 14 insertions(+), 2 deletions(-)
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index dd584da..30555f8 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -362,6 +362,17 @@ int xfs_lots_retries;
int xfs_lock_delays;
#endif
+#ifdef CONFIG_LOCKDEP
+static bool
+xfs_lockdep_subclass_ok(
+ int subclass)
+{
+ return subclass < MAX_LOCKDEP_SUBCLASSES;
+}
+#else
+#define xfs_lockdep_subclass_ok(subclass) (true)
+#endif
+
/*
* Bump the subclass so xfs_lock_inodes() acquires each lock with a different
* value. This can be called for any type of inode lock combination, including
@@ -375,11 +386,12 @@ xfs_lock_inumorder(int lock_mode, int subclass)
ASSERT(!(lock_mode & (XFS_ILOCK_PARENT | XFS_ILOCK_RTBITMAP |
XFS_ILOCK_RTSUM)));
+ ASSERT(xfs_lockdep_subclass_ok(subclass));
if (lock_mode & (XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL)) {
ASSERT(subclass <= XFS_IOLOCK_MAX_SUBCLASS);
- ASSERT(subclass + XFS_IOLOCK_PARENT_VAL <
- MAX_LOCKDEP_SUBCLASSES);
+ ASSERT(xfs_lockdep_subclass_ok(subclass +
+ XFS_IOLOCK_PARENT_VAL));
class += subclass << XFS_IOLOCK_SHIFT;
if (lock_mode & XFS_IOLOCK_PARENT)
class += XFS_IOLOCK_PARENT_VAL << XFS_IOLOCK_SHIFT;
--
2.5.0
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next reply other threads:[~2015-08-19 10:23 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-19 10:23 Dave Chinner [this message]
2015-08-19 22:50 ` [PATCH] xfs: inode lockdep annotations broke non-lockdep build Eric Sandeen
2015-08-20 11:32 ` Brian Foster
2015-08-21 0:42 ` Dave Chinner
2015-08-21 11:09 ` Brian Foster
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