Apply patch to fix autofs4 lockdep splat (rhbz 714828)
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Josh Boyer
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Path: news.gmane.org!not-for-mail
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From: Ian Kent <raven@themaw.net>
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Newsgroups: gmane.linux.kernel
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Subject: [PATCH] autofs4 - fix lockdep splat in autofs
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Date: Mon, 22 Aug 2011 11:52:28 +0800
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Lines: 35
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Cc: Kernel Mailing List <linux-kernel@vger.kernel.org>,
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Steven Rostedt <rostedt@goodmis.org>
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To: Al Viro <viro@ZenIV.linux.org.uk>
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From: Steven Rostedt <rostedt@goodmis.org>
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When recursing down the locks when traversing a tree/list in
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get_next_positive_dentry() or get_next_positive_subdir() a lock can
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change from being nested to being a parent which breaks lockdep. This
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patch tells lockdep about what we did.
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Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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Acked-by: Ian Kent <raven@themaw.net>
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---
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fs/autofs4/expire.c | 2 ++
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1 files changed, 2 insertions(+), 0 deletions(-)
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diff --git a/fs/autofs4/expire.c b/fs/autofs4/expire.c
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index 450f529..1feb68e 100644
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--- a/fs/autofs4/expire.c
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+++ b/fs/autofs4/expire.c
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@@ -124,6 +124,7 @@ start:
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/* Negative dentry - try next */
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if (!simple_positive(q)) {
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spin_unlock(&p->d_lock);
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+ lock_set_subclass(&q->d_lock.dep_map, 0, _RET_IP_);
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p = q;
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goto again;
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}
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@@ -186,6 +187,7 @@ again:
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/* Negative dentry - try next */
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if (!simple_positive(ret)) {
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spin_unlock(&p->d_lock);
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+ lock_set_subclass(&ret->d_lock.dep_map, 0, _RET_IP_);
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p = ret;
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goto again;
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}
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@ -755,6 +755,9 @@ Patch21234: Bluetooth-Remove-bogus-inline-decl-from-l2cap_chan_connect.patch
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#rhbz 754518
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Patch21235: scsi-sd_revalidate_disk-prevent-NULL-ptr-deref.patch
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#rhbz 714828
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Patch21236: autofs4-lockdep.patch
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# compat-wireless patches
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Patch50000: compat-wireless-config-fixups.patch
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Patch50001: compat-wireless-pr_fmt-warning-avoidance.patch
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@ -1458,6 +1461,9 @@ ApplyPatch Bluetooth-Remove-bogus-inline-decl-from-l2cap_chan_connect.patch
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#rhbz 754518
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ApplyPatch scsi-sd_revalidate_disk-prevent-NULL-ptr-deref.patch
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#rhbz 714828
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ApplyPatch autofs4-lockdep.patch
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# END OF PATCH APPLICATIONS
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%endif
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@ -2338,6 +2344,9 @@ fi
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# '-' | |
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# '-'
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%changelog
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* Mon Feb 13 2012 Josh Boyer <jwboyer@redhat.com>
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- Apply patch to fix autofs4 lockdep splat (rhbz 714828)
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* Mon Feb 13 2012 Josh Boyer <jwboyer@redhat.com> - 3.3.0-0.rc3.git4.1
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- Linux 3.3-rc3-git4 (upstream 3ec1e88b33a3bdd852ce8e014052acec7a9da8b5)
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