Messages in this thread | | | From | Baolin Wang <> | Date | Mon, 8 Jun 2020 20:07:29 +0800 | Subject | Re: drivers/hwspinlock/sirf_hwspinlock.c:87:34: warning: unused variable 'sirf_hwpinlock_ids' |
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On Mon, Jun 8, 2020 at 2:38 AM kernel test robot <lkp@intel.com> wrote: > > Hi Baolin, > > First bad commit (maybe != root cause): > > tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master > head: 3b69e8b4571125bec1f77f886174fe6cab6b9d75 > commit: ffd0bbfb378ecd56eac22bf932ccdbf89ac7f725 hwspinlock: Allow drivers to be built with COMPILE_TEST > date: 2 months ago > config: arm-randconfig-r001-20200607 (attached as .config) > compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project e429cffd4f228f70c1d9df0e5d77c08590dd9766) > 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 > # install arm cross compiling tool for clang build > # apt-get install binutils-arm-linux-gnueabi > git checkout ffd0bbfb378ecd56eac22bf932ccdbf89ac7f725 > # save the attached .config to linux build tree > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kernel test robot <lkp@intel.com> > > All warnings (new ones prefixed by >>, old ones prefixed by <<): > > >> drivers/hwspinlock/sirf_hwspinlock.c:87:34: warning: unused variable 'sirf_hwpinlock_ids' [-Wunused-const-variable] > static const struct of_device_id sirf_hwpinlock_ids[] = {
In your testing configuration, the CONFIG_OF is not select, so the macro 'of_match_ptr' becomes NULL, which triggers this waring. I think we can remove the redundant "of_match_ptr" to fix this warning. Thanks for your report.
> ^ > 1 warning generated. > > vim +/sirf_hwpinlock_ids +87 drivers/hwspinlock/sirf_hwspinlock.c > > cc16d664e21ef6 Wei Chen 2015-05-26 86 > cc16d664e21ef6 Wei Chen 2015-05-26 @87 static const struct of_device_id sirf_hwpinlock_ids[] = { > cc16d664e21ef6 Wei Chen 2015-05-26 88 { .compatible = "sirf,hwspinlock", }, > cc16d664e21ef6 Wei Chen 2015-05-26 89 {}, > cc16d664e21ef6 Wei Chen 2015-05-26 90 }; > cc16d664e21ef6 Wei Chen 2015-05-26 91 MODULE_DEVICE_TABLE(of, sirf_hwpinlock_ids); > cc16d664e21ef6 Wei Chen 2015-05-26 92 > > :::::: The code at line 87 was first introduced by commit > :::::: cc16d664e21ef640faaf51e9952384cf90b92d9f hwspinlock: add a CSR atlas7 driver > > :::::: TO: Wei Chen <wei.chen@csr.com> > :::::: CC: Ohad Ben-Cohen <ohad@wizery.com> > > --- > 0-DAY CI Kernel Test Service, Intel Corporation > https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
-- Baolin Wang
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