Messages in this thread | | | Date | Thu, 3 Jun 2021 04:01:19 +0800 | From | kernel test robot <> | Subject | sound/core/jack.c:632:15: warning: variable 'mask_bits' set but not used |
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 231bc539066760aaa44d46818c85b14ca2f56d9f commit: 2d670ea2bd53a9792f453bb5b97cb8ef695988ff ALSA: jack: implement software jack injection via debugfs date: 4 months ago config: powerpc64-randconfig-r004-20210601 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project d41cb6bb2607fa5c7a9df2b3dab361353657d225) 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 powerpc64 cross compiling tool for clang build # apt-get install binutils-powerpc64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2d670ea2bd53a9792f453bb5b97cb8ef695988ff git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 2d670ea2bd53a9792f453bb5b97cb8ef695988ff # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc64
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 >>):
In file included from sound/core/jack.c:8: In file included from include/linux/input.h:8: In file included from include/linux/time.h:6: In file included from include/linux/math64.h:7: In file included from ./arch/powerpc/include/generated/asm/div64.h:1: In file included from include/asm-generic/div64.h:53: In file included from include/linux/log2.h:12: In file included from include/linux/bitops.h:32: In file included from arch/powerpc/include/asm/bitops.h:62: arch/powerpc/include/asm/barrier.h:49:9: warning: '__lwsync' macro redefined [-Wmacro-redefined] #define __lwsync() __asm__ __volatile__ (stringify_in_c(LWSYNC) : : :"memory") ^ <built-in>:308:9: note: previous definition is here #define __lwsync __builtin_ppc_lwsync ^ >> sound/core/jack.c:632:15: warning: variable 'mask_bits' set but not used [-Wunused-but-set-variable] unsigned int mask_bits = 0; ^ 2 warnings generated.
Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for ATA Depends on HAS_IOMEM && BLOCK Selected by - AKEBONO && PPC_47x WARNING: unmet direct dependencies detected for NETDEVICES Depends on NET Selected by - AKEBONO && PPC_47x WARNING: unmet direct dependencies detected for ETHERNET Depends on NETDEVICES && NET Selected by - AKEBONO && PPC_47x
vim +/mask_bits +632 sound/core/jack.c
622 623 /** 624 * snd_jack_report - Report the current status of a jack 625 * 626 * @jack: The jack to report status for 627 * @status: The current status of the jack 628 */ 629 void snd_jack_report(struct snd_jack *jack, int status) 630 { 631 struct snd_jack_kctl *jack_kctl; > 632 unsigned int mask_bits = 0; 633 #ifdef CONFIG_SND_JACK_INPUT_DEV 634 int i; 635 #endif 636 637 if (!jack) 638 return; 639 640 jack->hw_status_cache = status; 641 642 list_for_each_entry(jack_kctl, &jack->kctl_list, list) 643 if (jack_kctl->sw_inject_enable) 644 mask_bits |= jack_kctl->mask_bits; 645 else 646 snd_kctl_jack_report(jack->card, jack_kctl->kctl, 647 status & jack_kctl->mask_bits); 648
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