linux-kernel - [peterz-queue:sched/idle 15/37] kernel/time/tick-broadcast.c:627:9: error: call to undeclared function 'arch_test_bit'; ISO C99 and later do not support implicit function declarations

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Date:   Mon, 6 Jun 2022 06:13:13 +0800
From:   kernel test robot <lkp@...el.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org
Subject: [peterz-queue:sched/idle 15/37] kernel/time/tick-broadcast.c:627:9:
 error: call to undeclared function 'arch_test_bit'; ISO C99 and later do not
 support implicit function declarations

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git sched/idle
head:   e11e56428f57b36930eb0f8eed997a462010aa95
commit: b581e362d475d40edb2d1099d19a8e12721e7734 [15/37] cpuidle: Fix rcu_idle_*() usage
config: hexagon-randconfig-r024-20220605 (https://download.01.org/0day-ci/archive/20220606/202206060612.7U4QNOzX-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 416a5080d89066029f9889dc23f94de47c2fa895)
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
        # https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git/commit/?id=b581e362d475d40edb2d1099d19a8e12721e7734
        git remote add peterz-queue https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git
        git fetch --no-tags peterz-queue sched/idle
        git checkout b581e362d475d40edb2d1099d19a8e12721e7734
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash kernel/time/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@...el.com>

All errors (new ones prefixed by >>):

>> kernel/time/tick-broadcast.c:627:9: error: call to undeclared function 'arch_test_bit'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
           return arch_test_bit(smp_processor_id(), cpumask_bits(tick_broadcast_force_mask));
                  ^
   kernel/time/tick-broadcast.c:627:9: note: did you mean '__test_bit'?
   arch/hexagon/include/asm/bitops.h:161:19: note: '__test_bit' declared here
   static inline int __test_bit(int nr, const volatile unsigned long *addr)
                     ^
   1 error generated.


vim +/arch_test_bit +627 kernel/time/tick-broadcast.c

   617	
   618	/*
   619	 * Called before going idle with interrupts disabled. Checks whether a
   620	 * broadcast event from the other core is about to happen. We detected
   621	 * that in tick_broadcast_oneshot_control(). The callsite can use this
   622	 * to avoid a deep idle transition as we are about to get the
   623	 * broadcast IPI right away.
   624	 */
   625	noinstr int tick_check_broadcast_expired(void)
   626	{
 > 627		return arch_test_bit(smp_processor_id(), cpumask_bits(tick_broadcast_force_mask));
   628	}
   629	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp