Re: [PATCH v2 2/4] arm64, scs: save scs_sp values per-cpu when switching stacks

From: kernel test robot <lkp@intel.com>
To: andrey.konovalov@linux.dev, Marco Elver <elver@google.com>,
	Alexander Potapenko <glider@google.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>
Cc: kbuild-all@lists.01.org,
	Linux Memory Management List <linux-mm@kvack.org>,
	Andrey Konovalov <andreyknvl@gmail.com>,
	Dmitry Vyukov <dvyukov@google.com>,
	Andrey Ryabinin <ryabinin.a.a@gmail.com>,
	kasan-dev@googlegroups.com, Mark Rutland <mark.rutland@arm.com>,
	Vincenzo Frascino <vincenzo.frascino@arm.com>,
	Sami Tolvanen <samitolvanen@google.com>,
	Peter Collingbourne <pcc@google.com>,
	Evgenii Stepanov <eugenis@google.com>,
	Florian Mayer <fmayer@google.com>,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 2/4] arm64, scs: save scs_sp values per-cpu when switching stacks
Date: Fri, 25 Mar 2022 05:39:41 +0800	[thread overview]
Message-ID: <202203250512.yMAPu8rv-lkp@intel.com> (raw)
In-Reply-To: <f75c58b17bfaa419f84286cd174e3a08f971b779.1648049113.git.andreyknvl@google.com>

Hi,

I love your patch! Yet something to improve:

[auto build test ERROR on next-20220323]
[also build test ERROR on v5.17]
[cannot apply to arm64/for-next/core hnaz-mm/master linus/master v5.17 v5.17-rc8 v5.17-rc7]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/andrey-konovalov-linux-dev/kasan-arm64-scs-stacktrace-collect-stack-traces-from-Shadow-Call-Stack/20220323-233436
base:    b61581ae229d8eb9f21f8753be3f4011f7692384
config: arm64-allyesconfig (https://download.01.org/0day-ci/archive/20220325/202203250512.yMAPu8rv-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 11.2.0
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://github.com/0day-ci/linux/commit/da5bedb1ac7aa0b303f6d996d306e675860b6e12
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review andrey-konovalov-linux-dev/kasan-arm64-scs-stacktrace-collect-stack-traces-from-Shadow-Call-Stack/20220323-233436
        git checkout da5bedb1ac7aa0b303f6d996d306e675860b6e12
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arm64 SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   arch/arm64/kernel/sdei.c: In function 'free_sdei_scs':
>> arch/arm64/kernel/sdei.c:124:33: error: 'sdei_shadow_call_stack_normal_ptr' undeclared (first use in this function)
     124 |                 _free_sdei_scs(&sdei_shadow_call_stack_normal_ptr, cpu);
         |                                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/arm64/kernel/sdei.c:124:33: note: each undeclared identifier is reported only once for each function it appears in
>> arch/arm64/kernel/sdei.c:125:33: error: 'sdei_shadow_call_stack_critical_ptr' undeclared (first use in this function); did you mean 'sdei_stack_critical_ptr'?
     125 |                 _free_sdei_scs(&sdei_shadow_call_stack_critical_ptr, cpu);
         |                                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         |                                 sdei_stack_critical_ptr
   arch/arm64/kernel/sdei.c: In function 'init_sdei_scs':
   arch/arm64/kernel/sdei.c:150:39: error: 'sdei_shadow_call_stack_normal_ptr' undeclared (first use in this function)
     150 |                 err = _init_sdei_scs(&sdei_shadow_call_stack_normal_ptr, cpu);
         |                                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/arm64/kernel/sdei.c:153:39: error: 'sdei_shadow_call_stack_critical_ptr' undeclared (first use in this function); did you mean 'sdei_stack_critical_ptr'?
     153 |                 err = _init_sdei_scs(&sdei_shadow_call_stack_critical_ptr, cpu);
         |                                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         |                                       sdei_stack_critical_ptr

vim +/sdei_shadow_call_stack_normal_ptr +124 arch/arm64/kernel/sdei.c

ac20ffbb0279aae Sami Tolvanen 2020-11-30  118  
ac20ffbb0279aae Sami Tolvanen 2020-11-30  119  static void free_sdei_scs(void)
ac20ffbb0279aae Sami Tolvanen 2020-11-30  120  {
ac20ffbb0279aae Sami Tolvanen 2020-11-30  121  	int cpu;
ac20ffbb0279aae Sami Tolvanen 2020-11-30  122  
ac20ffbb0279aae Sami Tolvanen 2020-11-30  123  	for_each_possible_cpu(cpu) {
ac20ffbb0279aae Sami Tolvanen 2020-11-30 @124  		_free_sdei_scs(&sdei_shadow_call_stack_normal_ptr, cpu);
ac20ffbb0279aae Sami Tolvanen 2020-11-30 @125  		_free_sdei_scs(&sdei_shadow_call_stack_critical_ptr, cpu);
ac20ffbb0279aae Sami Tolvanen 2020-11-30  126  	}
ac20ffbb0279aae Sami Tolvanen 2020-11-30  127  }
ac20ffbb0279aae Sami Tolvanen 2020-11-30  128  

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