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Message-ID: <202302260657.7dM9Uwev-lkp@intel.com>
Date: Mon, 27 Feb 2023 07:25:16 +0300
From: Dan Carpenter <error27@...il.com>
To: oe-kbuild@...ts.linux.dev, Rashmica Gupta <rashmica.g@...il.com>
Cc: lkp@...el.com, oe-kbuild-all@...ts.linux.dev,
linux-kernel@...r.kernel.org,
Michael Ellerman <mpe@...erman.id.au>,
Christophe Leroy <christophe.leroy@...roup.eu>,
Madhavan Srinivasan <maddy@...ux.vnet.ibm.com>
Subject: arch/powerpc/perf/mpc7450-pmu.c:422 init_mpc7450_pmu() warn: masked
condition '((pvr >> 16) & 65535) != 2147483648' is always true.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 116b41162f8b267987ea9a73eb7e73eaa7c2cce5
commit: ec3eb9d941a98f4c0dac263110729680a734279b powerpc/perf: Use PVR rather than oprofile field to determine CPU version
config: powerpc-randconfig-m031-20230226 (https://download.01.org/0day-ci/archive/20230226/202302260657.7dM9Uwev-lkp@intel.com/config)
compiler: powerpc-linux-gcc (GCC) 12.1.0
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
| Reported-by: Dan Carpenter <error27@...il.com>
| Link: https://lore.kernel.org/r/202302260657.7dM9Uwev-lkp@intel.com/
smatch warnings:
arch/powerpc/perf/mpc7450-pmu.c:422 init_mpc7450_pmu() warn: masked condition '((pvr >> 16) & 65535) != 2147483648' is always true.
vim +422 arch/powerpc/perf/mpc7450-pmu.c
77c2342a578c11 arch/powerpc/kernel/mpc7450-pmu.c Dmitry Baryshkov 2011-06-29 418 static int __init init_mpc7450_pmu(void)
7325927e5a20bf arch/powerpc/kernel/mpc7450-pmu.c Paul Mackerras 2009-06-17 419 {
ec3eb9d941a98f arch/powerpc/perf/mpc7450-pmu.c Rashmica Gupta 2022-07-07 420 unsigned int pvr = mfspr(SPRN_PVR);
ec3eb9d941a98f arch/powerpc/perf/mpc7450-pmu.c Rashmica Gupta 2022-07-07 421
ec3eb9d941a98f arch/powerpc/perf/mpc7450-pmu.c Rashmica Gupta 2022-07-07 @422 if (PVR_VER(pvr) != PVR_7450)
^^^^^^^^^^^^^^^^^^^^^^^^
Impossible. Unclear what was intended.
7325927e5a20bf arch/powerpc/kernel/mpc7450-pmu.c Paul Mackerras 2009-06-17 423 return -ENODEV;
7325927e5a20bf arch/powerpc/kernel/mpc7450-pmu.c Paul Mackerras 2009-06-17 424
7325927e5a20bf arch/powerpc/kernel/mpc7450-pmu.c Paul Mackerras 2009-06-17 425 return register_power_pmu(&mpc7450_pmu);
7325927e5a20bf arch/powerpc/kernel/mpc7450-pmu.c Paul Mackerras 2009-06-17 426 }
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests
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