[jirislaby:lto 40/48] arch/x86/events/amd/core.c:696:23: warning: no previous prototype for 'amd_pmu_test_overflow_topbit'

From: kernel test robot
Date: Mon Jun 27 2022 - 21:49:28 EST


tree: https://git.kernel.org/pub/scm/linux/kernel/git/jirislaby/linux.git lto
head: b5ee1c28376713353cb5355716949d9c6d9b416b
commit: 37d6f8c7840982bb452f8bb411fba6a7f4f0e8e9 [40/48] cpufreq, amd-pstate, lto: Fix for gcc LTO
config: i386-defconfig (https://download.01.org/0day-ci/archive/20220627/202206271846.ABXxrU2T-lkp@xxxxxxxxx/config)
compiler: gcc-11 (Debian 11.3.0-3) 11.3.0
reproduce (this is a W=1 build):
# https://git.kernel.org/pub/scm/linux/kernel/git/jirislaby/linux.git/commit/?id=37d6f8c7840982bb452f8bb411fba6a7f4f0e8e9
git remote add jirislaby https://git.kernel.org/pub/scm/linux/kernel/git/jirislaby/linux.git
git fetch --no-tags jirislaby lto
git checkout 37d6f8c7840982bb452f8bb411fba6a7f4f0e8e9
# save the config file
mkdir build_dir && cp config build_dir/.config
make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash arch/x86/events/amd/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <yujie.liu@xxxxxxxxx>

All warnings (new ones prefixed by >>):

>> arch/x86/events/amd/core.c:696:23: warning: no previous prototype for 'amd_pmu_test_overflow_topbit' [-Wmissing-prototypes]
696 | __visible_on_lto bool amd_pmu_test_overflow_topbit(int idx)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/amd_pmu_test_overflow_topbit +696 arch/x86/events/amd/core.c

7685665c390dc6 Sandipan Das 2022-04-21 695
37d6f8c7840982 Andi Kleen 2022-02-18 @696 __visible_on_lto bool amd_pmu_test_overflow_topbit(int idx)
7685665c390dc6 Sandipan Das 2022-04-21 697 {
7685665c390dc6 Sandipan Das 2022-04-21 698 u64 counter;
7685665c390dc6 Sandipan Das 2022-04-21 699
7685665c390dc6 Sandipan Das 2022-04-21 700 rdmsrl(x86_pmu_event_addr(idx), counter);
7685665c390dc6 Sandipan Das 2022-04-21 701
7685665c390dc6 Sandipan Das 2022-04-21 702 return !(counter & BIT_ULL(x86_pmu.cntval_bits - 1));
7685665c390dc6 Sandipan Das 2022-04-21 703 }
7685665c390dc6 Sandipan Das 2022-04-21 704

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