From: kbuild test robot <lkp@intel.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: kbuild-all@01.org, Linus Torvalds <torvalds@linux-foundation.org>,
Will Deacon <will.deacon@arm.com>,
Oleg Nesterov <oleg@redhat.com>,
Paul McKenney <paulmck@linux.vnet.ibm.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Michael Ellerman <mpe@ellerman.id.au>,
linux-kernel@vger.kernel.org, Nicholas Piggin <npiggin@gmail.com>,
Ingo Molnar <mingo@kernel.org>,
Alan Stern <stern@rowland.harvard.edu>
Subject: Re: Question on smp_mb__before_spinlock
Date: Mon, 5 Sep 2016 18:51:31 +0800 [thread overview]
Message-ID: <201609051808.7B9BnhPf%fengguang.wu@intel.com> (raw)
In-Reply-To: <20160905093753.GN10138@twins.programming.kicks-ass.net>
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Hi Peter,
[auto build test ERROR on linus/master]
[also build test ERROR on v4.8-rc5 next-20160825]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
[Suggest to use git(>=2.9.0) format-patch --base=<commit> (or --base=auto for convenience) to record what (public, well-known) commit your patch series was built on]
[Check https://git-scm.com/docs/git-format-patch for more information]
url: https://github.com/0day-ci/linux/commits/Peter-Zijlstra/Question-on-smp_mb__before_spinlock/20160905-174026
config: i386-randconfig-s1-201636 (attached as .config)
compiler: gcc-6 (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
# save the attached .config to linux build tree
make ARCH=i386
All errors (new ones prefixed by >>):
fs/overlayfs/readdir.c: In function 'ovl_dir_fsync':
>> fs/overlayfs/readdir.c:449:4: error: implicit declaration of function 'smp_mb__before_spinlock' [-Werror=implicit-function-declaration]
smp_mb__before_spinlock();
^~~~~~~~~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors
vim +/smp_mb__before_spinlock +449 fs/overlayfs/readdir.c
d45f00ae Al Viro 2014-10-28 443 realfile = lockless_dereference(od->upperfile);
e9be9d5e Miklos Szeredi 2014-10-24 444 if (!realfile) {
e9be9d5e Miklos Szeredi 2014-10-24 445 struct path upperpath;
e9be9d5e Miklos Szeredi 2014-10-24 446
e9be9d5e Miklos Szeredi 2014-10-24 447 ovl_path_upper(dentry, &upperpath);
e9be9d5e Miklos Szeredi 2014-10-24 448 realfile = ovl_path_open(&upperpath, O_RDONLY);
d45f00ae Al Viro 2014-10-28 @449 smp_mb__before_spinlock();
5955102c Al Viro 2016-01-22 450 inode_lock(inode);
3d268c9b Al Viro 2014-10-23 451 if (!od->upperfile) {
e9be9d5e Miklos Szeredi 2014-10-24 452 if (IS_ERR(realfile)) {
:::::: The code at line 449 was first introduced by commit
:::::: d45f00ae43e63eff1b3d79df20610ae1ef645ebd overlayfs: barriers for opening upper-layer directory
:::::: TO: Al Viro <viro@zeniv.linux.org.uk>
:::::: CC: Al Viro <viro@zeniv.linux.org.uk>
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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next prev parent reply other threads:[~2016-09-05 10:52 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-05 9:37 Question on smp_mb__before_spinlock Peter Zijlstra
2016-09-05 9:56 ` kbuild test robot
2016-09-05 10:19 ` Peter Zijlstra
2016-09-05 11:26 ` Fengguang Wu
2016-09-05 10:10 ` Will Deacon
2016-09-06 11:17 ` Peter Zijlstra
2016-09-06 17:42 ` Will Deacon
2016-09-05 10:37 ` Paul E. McKenney
2016-09-05 11:34 ` Peter Zijlstra
2016-09-05 13:57 ` Paul E. McKenney
2016-09-05 10:51 ` kbuild test robot [this message]
2016-09-07 12:17 ` Nicholas Piggin
2016-09-07 13:23 ` Peter Zijlstra
2016-09-07 13:51 ` Will Deacon
2016-09-12 2:35 ` Nicholas Piggin
2016-09-12 2:27 ` Nicholas Piggin
2016-09-12 12:54 ` Peter Zijlstra
2016-09-13 2:05 ` Nicholas Piggin
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