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Date: Fri, 5 Mar 2021 13:49:41 +0800
From: kernel test robot <lkp@...el.com>
To: "Paul E. McKenney" <paulmck@...nel.org>
Cc: kbuild-all@...org, clang-built-linux@...glegroups.com,
linux-kernel@...r.kernel.org
Subject: kernel/rcu/tree.c:2073:23: warning: stack frame size of 2112 bytes
in function 'rcu_gp_kthread'
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 280d542f6ffac0e6d65dc267f92191d509b13b64
commit: 7dffe01765d9309b8bd5505503933ec0ec53d192 rcu: Add lockdep_assert_irqs_disabled() to raw_spin_unlock_rcu_node() macros
date: 8 weeks ago
config: powerpc-randconfig-r035-20210305 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 4d90e460bcc7b3e5ff6c7e2e05e974772489c4b8)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install powerpc cross compiling tool for clang build
# apt-get install binutils-powerpc-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7dffe01765d9309b8bd5505503933ec0ec53d192
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 7dffe01765d9309b8bd5505503933ec0ec53d192
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
All warnings (new ones prefixed by >>):
__do_insb
^
arch/powerpc/include/asm/io.h:541:56: note: expanded from macro '__do_insb'
#define __do_insb(p, b, n) readsb((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
~~~~~~~~~~~~~~~~~~~~~^
In file included from kernel/rcu/tree.c:26:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:10:
In file included from arch/powerpc/include/asm/hardirq.h:6:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/powerpc/include/asm/io.h:604:
arch/powerpc/include/asm/io-defs.h:45:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
DEF_PCI_AC_NORET(insw, (unsigned long p, void *b, unsigned long c),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:244:1: note: expanded from here
__do_insw
^
arch/powerpc/include/asm/io.h:542:56: note: expanded from macro '__do_insw'
#define __do_insw(p, b, n) readsw((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
~~~~~~~~~~~~~~~~~~~~~^
In file included from kernel/rcu/tree.c:26:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:10:
In file included from arch/powerpc/include/asm/hardirq.h:6:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/powerpc/include/asm/io.h:604:
arch/powerpc/include/asm/io-defs.h:47:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
DEF_PCI_AC_NORET(insl, (unsigned long p, void *b, unsigned long c),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:246:1: note: expanded from here
__do_insl
^
arch/powerpc/include/asm/io.h:543:56: note: expanded from macro '__do_insl'
#define __do_insl(p, b, n) readsl((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
~~~~~~~~~~~~~~~~~~~~~^
In file included from kernel/rcu/tree.c:26:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:10:
In file included from arch/powerpc/include/asm/hardirq.h:6:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/powerpc/include/asm/io.h:604:
arch/powerpc/include/asm/io-defs.h:49:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
DEF_PCI_AC_NORET(outsb, (unsigned long p, const void *b, unsigned long c),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:3:1: note: expanded from here
__do_outsb
^
arch/powerpc/include/asm/io.h:544:58: note: expanded from macro '__do_outsb'
#define __do_outsb(p, b, n) writesb((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
~~~~~~~~~~~~~~~~~~~~~^
In file included from kernel/rcu/tree.c:26:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:10:
In file included from arch/powerpc/include/asm/hardirq.h:6:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/powerpc/include/asm/io.h:604:
arch/powerpc/include/asm/io-defs.h:51:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
DEF_PCI_AC_NORET(outsw, (unsigned long p, const void *b, unsigned long c),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:5:1: note: expanded from here
__do_outsw
^
arch/powerpc/include/asm/io.h:545:58: note: expanded from macro '__do_outsw'
#define __do_outsw(p, b, n) writesw((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
~~~~~~~~~~~~~~~~~~~~~^
In file included from kernel/rcu/tree.c:26:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:10:
In file included from arch/powerpc/include/asm/hardirq.h:6:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/powerpc/include/asm/io.h:604:
arch/powerpc/include/asm/io-defs.h:53:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
DEF_PCI_AC_NORET(outsl, (unsigned long p, const void *b, unsigned long c),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:7:1: note: expanded from here
__do_outsl
^
arch/powerpc/include/asm/io.h:546:58: note: expanded from macro '__do_outsl'
#define __do_outsl(p, b, n) writesl((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
~~~~~~~~~~~~~~~~~~~~~^
>> kernel/rcu/tree.c:2073:23: warning: stack frame size of 2112 bytes in function 'rcu_gp_kthread' [-Wframe-larger-than=]
static int __noreturn rcu_gp_kthread(void *unused)
^
13 warnings generated.
vim +/rcu_gp_kthread +2073 kernel/rcu/tree.c
7fdefc10e1d730 kernel/rcutree.c Paul E. McKenney 2012-06-22 2069
7fdefc10e1d730 kernel/rcutree.c Paul E. McKenney 2012-06-22 2070 /*
7fdefc10e1d730 kernel/rcutree.c Paul E. McKenney 2012-06-22 2071 * Body of kthread that handles grace periods.
7fdefc10e1d730 kernel/rcutree.c Paul E. McKenney 2012-06-22 2072 */
0854a05c9fa554 kernel/rcu/tree.c Paul E. McKenney 2018-07-03 @2073 static int __noreturn rcu_gp_kthread(void *unused)
7fdefc10e1d730 kernel/rcutree.c Paul E. McKenney 2012-06-22 2074 {
5871968d531f39 kernel/rcu/tree.c Paul E. McKenney 2015-02-24 2075 rcu_bind_gp_kthread();
7fdefc10e1d730 kernel/rcutree.c Paul E. McKenney 2012-06-22 2076 for (;;) {
7fdefc10e1d730 kernel/rcutree.c Paul E. McKenney 2012-06-22 2077
7fdefc10e1d730 kernel/rcutree.c Paul E. McKenney 2012-06-22 2078 /* Handle grace-period start. */
7fdefc10e1d730 kernel/rcutree.c Paul E. McKenney 2012-06-22 2079 for (;;) {
0f11ad323dd3d3 kernel/rcu/tree.c Paul E. McKenney 2020-02-10 2080 trace_rcu_grace_period(rcu_state.name, rcu_state.gp_seq,
63c4db78e80407 kernel/rcutree.c Paul E. McKenney 2013-08-09 2081 TPS("reqwait"));
9cbc5b97029bff kernel/rcu/tree.c Paul E. McKenney 2018-07-05 2082 rcu_state.gp_state = RCU_GP_WAIT_GPS;
9cbc5b97029bff kernel/rcu/tree.c Paul E. McKenney 2018-07-05 2083 swait_event_idle_exclusive(rcu_state.gp_wq,
9cbc5b97029bff kernel/rcu/tree.c Paul E. McKenney 2018-07-05 2084 READ_ONCE(rcu_state.gp_flags) &
4cdfc175c25c89 kernel/rcutree.c Paul E. McKenney 2012-06-22 2085 RCU_GP_FLAG_INIT);
55b2dcf5870004 kernel/rcu/tree.c Paul E. McKenney 2020-04-01 2086 rcu_gp_torture_wait();
9cbc5b97029bff kernel/rcu/tree.c Paul E. McKenney 2018-07-05 2087 rcu_state.gp_state = RCU_GP_DONE_GPS;
78e4bc34e5d966 kernel/rcu/tree.c Paul E. McKenney 2013-09-24 2088 /* Locking provides needed memory barrier. */
0854a05c9fa554 kernel/rcu/tree.c Paul E. McKenney 2018-07-03 2089 if (rcu_gp_init())
7fdefc10e1d730 kernel/rcutree.c Paul E. McKenney 2012-06-22 2090 break;
cee43939893337 kernel/rcu/tree.c Paul E. McKenney 2018-03-02 2091 cond_resched_tasks_rcu_qs();
9cbc5b97029bff kernel/rcu/tree.c Paul E. McKenney 2018-07-05 2092 WRITE_ONCE(rcu_state.gp_activity, jiffies);
73a860cd58a1eb kernel/rcu/tree.c Paul E. McKenney 2014-08-14 2093 WARN_ON(signal_pending(current));
0f11ad323dd3d3 kernel/rcu/tree.c Paul E. McKenney 2020-02-10 2094 trace_rcu_grace_period(rcu_state.name, rcu_state.gp_seq,
63c4db78e80407 kernel/rcutree.c Paul E. McKenney 2013-08-09 2095 TPS("reqwaitsig"));
7fdefc10e1d730 kernel/rcutree.c Paul E. McKenney 2012-06-22 2096 }
7fdefc10e1d730 kernel/rcutree.c Paul E. McKenney 2012-06-22 2097
4cdfc175c25c89 kernel/rcutree.c Paul E. McKenney 2012-06-22 2098 /* Handle quiescent-state forcing. */
c3854a055bc834 kernel/rcu/tree.c Paul E. McKenney 2018-07-05 2099 rcu_gp_fqs_loop();
4cdfc175c25c89 kernel/rcutree.c Paul E. McKenney 2012-06-22 2100
4cdfc175c25c89 kernel/rcutree.c Paul E. McKenney 2012-06-22 2101 /* Handle grace-period end. */
9cbc5b97029bff kernel/rcu/tree.c Paul E. McKenney 2018-07-05 2102 rcu_state.gp_state = RCU_GP_CLEANUP;
0854a05c9fa554 kernel/rcu/tree.c Paul E. McKenney 2018-07-03 2103 rcu_gp_cleanup();
9cbc5b97029bff kernel/rcu/tree.c Paul E. McKenney 2018-07-05 2104 rcu_state.gp_state = RCU_GP_CLEANED;
4cdfc175c25c89 kernel/rcutree.c Paul E. McKenney 2012-06-22 2105 }
b3dbec76e5334f kernel/rcutree.c Paul E. McKenney 2012-06-18 2106 }
b3dbec76e5334f kernel/rcutree.c Paul E. McKenney 2012-06-18 2107
:::::: The code at line 2073 was first introduced by commit
:::::: 0854a05c9fa554930174f0fa7453c18f99108a4a rcu: Remove rsp parameter from rcu_gp_kthread() and friends
:::::: TO: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
:::::: CC: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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