Hi Waiman, [auto build test ERROR on linus/master] [also build test ERROR on v4.10-rc1 next-20161224] [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/futex-Introducing-throughput-optimized-TP-futexes/20161230-020021 config: m32r-usrv_defconfig (attached as .config) compiler: m32r-linux-gcc (GCC) 6.2.0 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=m32r All errors (new ones prefixed by >>): kernel/built-in.o: In function `futex_spin_on_reader': >> kernel/futex.c:3961: undefined reference to `osq_lock' kernel/futex.c:3961:(.text+0x60cd8): relocation truncated to fit: R_M32R_26_PCREL_RELA against undefined symbol `osq_lock' >> kernel/futex.c:3988: undefined reference to `osq_unlock' kernel/futex.c:3988:(.text+0x61028): relocation truncated to fit: R_M32R_26_PCREL_RELA against undefined symbol `osq_unlock' kernel/futex.c:3994: undefined reference to `osq_unlock' kernel/futex.c:3994:(.text+0x61080): relocation truncated to fit: R_M32R_26_PCREL_RELA against undefined symbol `osq_unlock' vim +3961 kernel/futex.c 3955 first_reader = READ_ONCE(state->first_reader); 3956 if (!first_reader) 3957 first_reader = cmpxchg(&state->first_reader, NULL, current); 3958 if (!first_reader) 3959 goto out; /* Became the first reader */ 3960 > 3961 if (!osq_lock(&state->reader_osq)) 3962 goto reschedule; 3963 3964 for (;;) { 3965 u32 uval; 3966 3967 if (!state->locksteal_disabled) { 3968 ret = futex_trylock_preempt_disabled(uaddr, 3969 FUTEX_SHARED, &uval); 3970 /* 3971 * Return if lock acquired or an error happened 3972 */ 3973 if (ret) 3974 break; 3975 } 3976 3977 /* 3978 * Reread the first reader value again. 3979 */ 3980 first_reader = READ_ONCE(state->first_reader); 3981 if (!first_reader) 3982 first_reader = cmpxchg(&state->first_reader, NULL, 3983 current); 3984 if (!first_reader || !first_reader->on_cpu) 3985 break; 3986 3987 if (need_resched()) { > 3988 osq_unlock(&state->reader_osq); 3989 goto reschedule; 3990 } 3991 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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