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* kernel/rcu/tree.c:2073:23: warning: stack frame size of 2112 bytes in function 'rcu_gp_kthread'
@ 2021-03-05  5:49 ` kernel test robot
  0 siblings, 0 replies; 2+ messages in thread
From: kernel test robot @ 2021-03-05  5:49 UTC (permalink / raw)
  To: Paul E. McKenney; +Cc: kbuild-all, clang-built-linux, linux-kernel

[-- Attachment #1: Type: text/plain, Size: 11706 bytes --]

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@intel.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@linux.vnet.ibm.com>
:::::: CC: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 19837 bytes --]

^ permalink raw reply	[flat|nested] 2+ messages in thread
* kernel/rcu/tree.c:2073:23: warning: stack frame size of 2112 bytes in function 'rcu_gp_kthread'
@ 2021-03-05  5:49 ` kernel test robot
  0 siblings, 0 replies; 2+ messages in thread
From: kernel test robot @ 2021-03-05  5:49 UTC (permalink / raw)
  To: kbuild-all

[-- Attachment #1: Type: text/plain, Size: 11888 bytes --]

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@intel.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@linux.vnet.ibm.com>
:::::: CC: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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