[kbuild-all] Re: kernel/rcu/tree.c:2073:23: warning: stack frame size of 2704 bytes in function 'rcu_gp_kthread'

On Sun, Jun 06, 2021 at 12:19:57PM +0800, kernel test robot wrote: > Hi Paul, > > FYI, the error/warning still remains. > > tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master > head: f5b6eb1e018203913dfefcf6fa988649ad11ad6e > commit: 7dffe01765d9309b8bd5505503933ec0ec53d192 rcu: Add lockdep_assert_irqs_disabled() to raw_spin_unlock_rcu_node() macros > date: 5 months ago > config: powerpc-randconfig-r023-20210606 (attached as .config) > compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 551a697c5cf33275b66add4fc467fcf59084cffb) > 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... > 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(a)intel.com&gt; > > All warnings (new ones prefixed by >>): > > In file included from kernel/rcu/tree.c:21: > In file included from include/linux/kernel.h:12: > In file included from include/linux/bitops.h:29: > In file included from arch/powerpc/include/asm/bitops.h:62: > arch/powerpc/include/asm/barrier.h:49:9: warning: '__lwsync' macro redefined [-Wmacro-redefined] > #define __lwsync() __asm__ __volatile__ (stringify_in_c(LWSYNC) : : :"memory") > ^ > <built-in>:310:9: note: previous definition is here > #define __lwsync __builtin_ppc_lwsync > ^ >>> kernel/rcu/tree.c:2073:23: warning: stack frame size of 2704 bytes in function 'rcu_gp_kthread' [-Wframe-larger-than=] > static int __noreturn rcu_gp_kthread(void *unused) Does -rcu commit 2f20de99a63b ("rcu: Make rcu_gp_cleanup() be noinline for tracing") help?