tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 9c7d619be5a002ea29c172df5e3c1227c22cbb41 commit: 09864c1cdf5c537bd01bff45181406e422ea988c tty: serial: Add linflexuart driver for S32V234 date: 12 months ago config: arm64-randconfig-s031-20200902 (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: v0.6.2-191-g10164920-dirty git checkout 09864c1cdf5c537bd01bff45181406e422ea988c # 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 <[email protected]> sparse warnings: (new ones prefixed by >>) drivers/tty/serial/fsl_linflexuart.c: note: in included file (through arch/arm64/include/generated/asm/qspinlock.h, arch/arm64/include/asm/spinlock.h, include/linux/spinlock.h, ...): >> include/asm-generic/qspinlock.h:94:9: sparse: sparse: context imbalance in >> 'linflex_console_write' - unexpected unlock # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=09864c1cdf5c537bd01bff45181406e422ea988c git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 09864c1cdf5c537bd01bff45181406e422ea988c vim +/linflex_console_write +94 include/asm-generic/qspinlock.h a33fda35e3a765 Waiman Long 2015-04-24 83 a33fda35e3a765 Waiman Long 2015-04-24 84 #ifndef queued_spin_unlock a33fda35e3a765 Waiman Long 2015-04-24 85 /** a33fda35e3a765 Waiman Long 2015-04-24 86 * queued_spin_unlock - release a queued spinlock a33fda35e3a765 Waiman Long 2015-04-24 87 * @lock : Pointer to queued spinlock structure a33fda35e3a765 Waiman Long 2015-04-24 88 */ a33fda35e3a765 Waiman Long 2015-04-24 89 static __always_inline void queued_spin_unlock(struct qspinlock *lock) a33fda35e3a765 Waiman Long 2015-04-24 90 { a33fda35e3a765 Waiman Long 2015-04-24 91 /* ca50e426f96c90 Pan Xinhui 2016-06-03 92 * unlock() needs release semantics: a33fda35e3a765 Waiman Long 2015-04-24 93 */ 626e5fbc143589 Will Deacon 2018-04-26 @94 smp_store_release(&lock->locked, 0); a33fda35e3a765 Waiman Long 2015-04-24 95 } a33fda35e3a765 Waiman Long 2015-04-24 96 #endif a33fda35e3a765 Waiman Long 2015-04-24 97 :::::: The code at line 94 was first introduced by commit :::::: 626e5fbc14358901ddaa90ce510e0fbeab310432 locking/qspinlock: Use smp_store_release() in queued_spin_unlock() :::::: TO: Will Deacon <[email protected]> :::::: CC: Ingo Molnar <[email protected]> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/[email protected]
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