[PATCH v2 12/22] arm64: Delay cpu feature checks

kbuild test robot lkp at intel.com
Mon Oct 5 21:41:51 PDT 2015

Hi Suzuki,

[auto build test ERROR on v4.3-rc4 -- if it's inappropriate base, please ignore]

config: arm64-alldefconfig (attached as .config)
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=arm64 

Note: the linux-review/Suzuki-K-Poulose/arm64-Consolidate-CPU-feature-handling HEAD bfdef3a10032e84cc7ae186a058443219f110679 builds fine.
      It only hurts bisectibility.

All errors (new ones prefixed by >>):

   arch/arm64/kernel/cpufeature.c: In function 'cpu_enable_features':
>> arch/arm64/kernel/cpufeature.c:733:52: error: 'const struct arm64_cpu_capabilities' has no member named 'sys_reg'
      if(!cpus_have_cap(caps[i].capability) || !caps[i].sys_reg)
   arch/arm64/kernel/cpufeature.c:739:47: error: 'const struct arm64_cpu_capabilities' has no member named 'sys_reg'
      if (!feature_matches(read_cpu_sysreg(caps[i].sys_reg), &caps[i]))

vim +733 arch/arm64/kernel/cpufeature.c

   727		const struct arm64_cpu_capabilities *caps = arm64_features;
   729		for(i = 0; caps[i].desc; i++)
   730			if (caps[i].enable && cpus_have_cap(caps[i].capability))
   731				caps[i].enable(NULL);
   732		for(i = 0; caps[i].desc; i++) {
 > 733			if(!cpus_have_cap(caps[i].capability) || !caps[i].sys_reg)
   734				continue;
   735			/*
   736			 * If the new CPU misses an advertised feature, we cannot proceed

0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
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