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Apply patch to fix autofs4 lockdep splat (rhbz 714828)

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This commit is contained in:
Josh Boyer 2012-02-13 20:48:11 -05:00
parent c47696a795
commit 3b80d49b15
2 changed files with 93 additions and 0 deletions
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84
autofs4-lockdep.patch Normal file
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@ -0,0 +1,84 @@
Path: news.gmane.org!not-for-mail
From: Ian Kent <raven@themaw.net>
Newsgroups: gmane.linux.kernel
Subject: [PATCH] autofs4 - fix lockdep splat in autofs
Date: Mon, 22 Aug 2011 11:52:28 +0800
Lines: 35
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Cc: Kernel Mailing List <linux-kernel@vger.kernel.org>,
Steven Rostedt <rostedt@goodmis.org>
To: Al Viro <viro@ZenIV.linux.org.uk>
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From: Steven Rostedt <rostedt@goodmis.org>
When recursing down the locks when traversing a tree/list in
get_next_positive_dentry() or get_next_positive_subdir() a lock can
change from being nested to being a parent which breaks lockdep. This
patch tells lockdep about what we did.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Acked-by: Ian Kent <raven@themaw.net>
---
fs/autofs4/expire.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/fs/autofs4/expire.c b/fs/autofs4/expire.c
index 450f529..1feb68e 100644
--- a/fs/autofs4/expire.c
+++ b/fs/autofs4/expire.c
@@ -124,6 +124,7 @@ start:
/* Negative dentry - try next */
if (!simple_positive(q)) {
spin_unlock(&p->d_lock);
+ lock_set_subclass(&q->d_lock.dep_map, 0, _RET_IP_);
p = q;
goto again;
}
@@ -186,6 +187,7 @@ again:
/* Negative dentry - try next */
if (!simple_positive(ret)) {
spin_unlock(&p->d_lock);
+ lock_set_subclass(&ret->d_lock.dep_map, 0, _RET_IP_);
p = ret;
goto again;
}

9
kernel.spec
View File

@ -755,6 +755,9 @@ Patch21234: Bluetooth-Remove-bogus-inline-decl-from-l2cap_chan_connect.patch
#rhbz 754518
Patch21235: scsi-sd_revalidate_disk-prevent-NULL-ptr-deref.patch
#rhbz 714828
Patch21236: autofs4-lockdep.patch
# compat-wireless patches
Patch50000: compat-wireless-config-fixups.patch
Patch50001: compat-wireless-pr_fmt-warning-avoidance.patch
@ -1458,6 +1461,9 @@ ApplyPatch Bluetooth-Remove-bogus-inline-decl-from-l2cap_chan_connect.patch
#rhbz 754518
ApplyPatch scsi-sd_revalidate_disk-prevent-NULL-ptr-deref.patch
#rhbz 714828
ApplyPatch autofs4-lockdep.patch
# END OF PATCH APPLICATIONS
%endif
@ -2328,6 +2334,9 @@ fi
# ||----w |
# || ||
%changelog
* Mon Feb 13 2012 Josh Boyer <jwboyer@redhat.com>
- Apply patch to fix autofs4 lockdep splat (rhbz 714828)
* Mon Feb 13 2012 Josh Boyer <jwboyer@redhat.com> - 3.3.0-0.rc3.git4.1
- Linux 3.3-rc3-git4 (upstream 3ec1e88b33a3bdd852ce8e014052acec7a9da8b5)