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Date: Wed, 21 Sep 2016 18:25:27 +0800
From: kbuild test robot <lkp@...el.com>
To: Nicholas Piggin <npiggin@...il.com>
Cc: kbuild-all@...org, Tejun Heo <tj@...nel.org>,
Christoph Lameter <cl@...ux.com>,
Nicholas Piggin <npiggin@...il.com>,
linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH] percpu: improve generic percpu modify-return
implementation
Hi Nicholas,
[auto build test ERROR on asm-generic/master]
[also build test ERROR on v4.8-rc7 next-20160920]
[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/Nicholas-Piggin/percpu-improve-generic-percpu-modify-return-implementation/20160921-170016
base: https://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic.git master
config: blackfin-BF561-EZKIT-SMP_defconfig (attached as .config)
compiler: bfin-uclinux-gcc (GCC) 6.2.0
reproduce:
wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=blackfin
All error/warnings (new ones prefixed by >>):
mm/vmstat.c: In function 'refresh_cpu_vm_stats':
>> mm/vmstat.c:476:1: error: macro "raw_cpu_generic_xchg" requires 2 arguments, but only 1 given
v = this_cpu_xchg(p->vm_stat_diff[i], 0);
^ ~~~~~~~~~~~~
In file included from arch/blackfin/include/generated/asm/percpu.h:1:0,
from include/linux/percpu.h:12,
from include/linux/percpu-rwsem.h:6,
from include/linux/fs.h:30,
from mm/vmstat.c:12:
>> include/asm-generic/percpu.h:152:10: error: 'raw_cpu_generic_xchg' undeclared (first use in this function)
__ret = raw_cpu_generic_xchg(pcp); \
^
>> include/asm-generic/percpu.h:382:36: note: in expansion of macro 'this_cpu_generic_xchg'
#define this_cpu_xchg_1(pcp, nval) this_cpu_generic_xchg(pcp, nval)
^~~~~~~~~~~~~~~~~~~~~
>> include/linux/percpu-defs.h:323:24: note: in expansion of macro 'this_cpu_xchg_1'
case 1: pscr2_ret__ = stem##1(variable, __VA_ARGS__); break; \
^~~~
>> include/linux/percpu-defs.h:500:34: note: in expansion of macro '__pcpu_size_call_return2'
#define this_cpu_xchg(pcp, nval) __pcpu_size_call_return2(this_cpu_xchg_, pcp, nval)
^~~~~~~~~~~~~~~~~~~~~~~~
>> mm/vmstat.c:476:8: note: in expansion of macro 'this_cpu_xchg'
v = this_cpu_xchg(p->vm_stat_diff[i], 0);
^~~~~~~~~~~~~
include/asm-generic/percpu.h:152:10: note: each undeclared identifier is reported only once for each function it appears in
__ret = raw_cpu_generic_xchg(pcp); \
^
>> include/asm-generic/percpu.h:382:36: note: in expansion of macro 'this_cpu_generic_xchg'
#define this_cpu_xchg_1(pcp, nval) this_cpu_generic_xchg(pcp, nval)
^~~~~~~~~~~~~~~~~~~~~
>> include/linux/percpu-defs.h:323:24: note: in expansion of macro 'this_cpu_xchg_1'
case 1: pscr2_ret__ = stem##1(variable, __VA_ARGS__); break; \
^~~~
>> include/linux/percpu-defs.h:500:34: note: in expansion of macro '__pcpu_size_call_return2'
#define this_cpu_xchg(pcp, nval) __pcpu_size_call_return2(this_cpu_xchg_, pcp, nval)
^~~~~~~~~~~~~~~~~~~~~~~~
>> mm/vmstat.c:476:8: note: in expansion of macro 'this_cpu_xchg'
v = this_cpu_xchg(p->vm_stat_diff[i], 0);
^~~~~~~~~~~~~
>> mm/vmstat.c:476:1: error: macro "raw_cpu_generic_xchg" requires 2 arguments, but only 1 given
v = this_cpu_xchg(p->vm_stat_diff[i], 0);
^ ~~~~~~~~~~~~
>> mm/vmstat.c:476:1: error: macro "raw_cpu_generic_xchg" requires 2 arguments, but only 1 given
>> mm/vmstat.c:476:1: error: macro "raw_cpu_generic_xchg" requires 2 arguments, but only 1 given
vim +/raw_cpu_generic_xchg +476 mm/vmstat.c
ee99c71c KOSAKI Motohiro 2009-03-31 470 for_each_populated_zone(zone) {
fbc2edb0 Christoph Lameter 2013-09-11 471 struct per_cpu_pageset __percpu *p = zone->pageset;
2244b95a Christoph Lameter 2006-06-30 472
fbc2edb0 Christoph Lameter 2013-09-11 473 for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++) {
a7f75e25 Christoph Lameter 2008-02-04 474 int v;
a7f75e25 Christoph Lameter 2008-02-04 475
fbc2edb0 Christoph Lameter 2013-09-11 @476 v = this_cpu_xchg(p->vm_stat_diff[i], 0);
fbc2edb0 Christoph Lameter 2013-09-11 477 if (v) {
fbc2edb0 Christoph Lameter 2013-09-11 478
a7f75e25 Christoph Lameter 2008-02-04 479 atomic_long_add(v, &zone->vm_stat[i]);
:::::: The code at line 476 was first introduced by commit
:::::: fbc2edb05354480a88aa39db8a6acb5782fa1a1b vmstat: use this_cpu() to avoid irqon/off sequence in refresh_cpu_vm_stats
:::::: TO: Christoph Lameter <cl@...ux.com>
:::::: CC: Linus Torvalds <torvalds@...ux-foundation.org>
---
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