From: kernel test robot <lkp@intel.com>
To: Ionela Voinescu <ionela.voinescu@arm.com>
Cc: kbuild-all@lists.01.org, linux-kernel@vger.kernel.org,
Catalin Marinas <catalin.marinas@arm.com>,
Sudeep Holla <sudeep.holla@arm.com>
Subject: arch/arm64/kernel/topology.c:367:22: sparse: sparse: dereference of noderef expression
Date: Fri, 18 Dec 2020 05:00:16 +0800 [thread overview]
Message-ID: <202012180512.hxAiUO00-lkp@intel.com> (raw)
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 74f602dc96dd854c7b2034947798c1e2a6b84066
commit: 68c5debcc06d6d24f15dbf978780fc5efc147d5e arm64: implement CPPC FFH support using AMUs
date: 5 weeks ago
config: arm64-randconfig-s032-20201217 (attached as .config)
compiler: aarch64-linux-gcc (GCC) 9.3.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# apt-get install sparse
# sparse version: v0.6.3-184-g1b896707-dirty
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=68c5debcc06d6d24f15dbf978780fc5efc147d5e
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 68c5debcc06d6d24f15dbf978780fc5efc147d5e
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=arm64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
"sparse warnings: (new ones prefixed by >>)"
>> arch/arm64/kernel/topology.c:367:22: sparse: sparse: dereference of noderef expression
vim +367 arch/arm64/kernel/topology.c
362
363 int cpc_read_ffh(int cpu, struct cpc_reg *reg, u64 *val)
364 {
365 int ret = -EOPNOTSUPP;
366
> 367 switch ((u64)reg->address) {
368 case 0x0:
369 ret = counters_read_on_cpu(cpu, cpu_read_corecnt, val);
370 break;
371 case 0x1:
372 ret = counters_read_on_cpu(cpu, cpu_read_constcnt, val);
373 break;
374 }
375
376 if (!ret) {
377 *val &= GENMASK_ULL(reg->bit_offset + reg->bit_width - 1,
378 reg->bit_offset);
379 *val >>= reg->bit_offset;
380 }
381
382 return ret;
383 }
384
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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next reply other threads:[~2020-12-17 21:01 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-17 21:00 kernel test robot [this message]
2020-12-18 10:44 ` arch/arm64/kernel/topology.c:367:22: sparse: sparse: dereference of noderef expression Catalin Marinas
2021-01-06 15:07 ` Ionela Voinescu
2021-01-06 15:21 ` Catalin Marinas
2021-01-06 15:52 ` Ionela Voinescu
2021-01-06 16:13 ` Al Viro
2021-01-06 16:47 ` Ionela Voinescu
2021-01-06 17:47 ` Al Viro
2021-01-06 20:12 ` Ionela Voinescu
2021-01-06 20:46 ` Al Viro
-- strict thread matches above, loose matches on Subject: below --
2021-01-06 5:50 kernel test robot
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