Hi Waiman, [auto build test ERROR on tip/locking/core] [also build test ERROR on v4.8-rc1 next-20160809] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Waiman-Long/locking-mutex-Enable-optimistic-spinning-of-lock-waiter/20160811-074736 config: sparc64-defconfig (attached as .config) compiler: sparc64-linux-gnu-gcc (Debian 5.4.0-6) 5.4.0 20160609 reproduce: 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=sparc64 All error/warnings (new ones prefixed by >>): In file included from arch/sparc/include/asm/processor.h:4:0, from include/linux/mutex.h:19, from kernel/locking/mutex.c:20: kernel/locking/mutex.c: In function 'mutex_optimistic_spin': >> arch/sparc/include/asm/processor_64.h:208:21: error: expected expression >> before 'asm' #define cpu_relax() asm volatile("\n99:\n\t" \ ^ >> arch/sparc/include/asm/processor_64.h:219:32: note: in expansion of macro >> 'cpu_relax' #define cpu_relax_lowlatency() cpu_relax() ^ kernel/locking/mutex.c:355:10: note: in expansion of macro 'cpu_relax_lowlatency' for (;; cpu_relax_lowlatency()) { ^ vim +/cpu_relax +219 arch/sparc/include/asm/processor_64.h f5e706ad8 include/asm-sparc/processor_64.h Sam Ravnborg 2008-07-17 202 187818cd6 arch/sparc/include/asm/processor_64.h David S. Miller 2012-10-28 203 /* Please see the commentary in asm/backoff.h for a description of 08f800730 arch/sparc/include/asm/processor_64.h Adam Buchbinder 2016-03-04 204 * what these instructions are doing and how they have been chosen. 187818cd6 arch/sparc/include/asm/processor_64.h David S. Miller 2012-10-28 205 * To make a long story short, we are trying to yield the current cpu 187818cd6 arch/sparc/include/asm/processor_64.h David S. Miller 2012-10-28 206 * strand during busy loops. 187818cd6 arch/sparc/include/asm/processor_64.h David S. Miller 2012-10-28 207 */ e9b9eb59f arch/sparc/include/asm/processor_64.h David S. Miller 2012-10-27 @208 #define cpu_relax() asm volatile("\n99:\n\t" \ 270c10e00 arch/sparc/include/asm/processor_64.h David S. Miller 2012-10-27 209 "rd %%ccr, %%g0\n\t" \ e9b9eb59f arch/sparc/include/asm/processor_64.h David S. Miller 2012-10-27 210 "rd %%ccr, %%g0\n\t" \ e9b9eb59f arch/sparc/include/asm/processor_64.h David S. Miller 2012-10-27 211 "rd %%ccr, %%g0\n\t" \ 187818cd6 arch/sparc/include/asm/processor_64.h David S. Miller 2012-10-28 212 ".section .pause_3insn_patch,\"ax\"\n\t"\ e9b9eb59f arch/sparc/include/asm/processor_64.h David S. Miller 2012-10-27 213 ".word 99b\n\t" \ e9b9eb59f arch/sparc/include/asm/processor_64.h David S. Miller 2012-10-27 214 "wr %%g0, 128, %%asr27\n\t" \ e9b9eb59f arch/sparc/include/asm/processor_64.h David S. Miller 2012-10-27 215 "nop\n\t" \ e9b9eb59f arch/sparc/include/asm/processor_64.h David S. Miller 2012-10-27 216 "nop\n\t" \ e9b9eb59f arch/sparc/include/asm/processor_64.h David S. Miller 2012-10-27 217 ".previous" \ 270c10e00 arch/sparc/include/asm/processor_64.h David S. Miller 2012-10-27 218 ::: "memory") 3a6bfbc91 arch/sparc/include/asm/processor_64.h Davidlohr Bueso 2014-06-29 @219 #define cpu_relax_lowlatency() cpu_relax() f5e706ad8 include/asm-sparc/processor_64.h Sam Ravnborg 2008-07-17 220 f5e706ad8 include/asm-sparc/processor_64.h Sam Ravnborg 2008-07-17 221 /* Prefetch support. This is tuned for UltraSPARC-III and later. f5e706ad8 include/asm-sparc/processor_64.h Sam Ravnborg 2008-07-17 222 * UltraSPARC-I will treat these as nops, and UltraSPARC-II has :::::: The code at line 219 was first introduced by commit :::::: 3a6bfbc91df04b081a44d419e0260bad54abddf7 arch, locking: Ciao arch_mutex_cpu_relax() :::::: TO: Davidlohr Bueso <davidl...@hp.com> :::::: CC: Ingo Molnar <mi...@kernel.org> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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