# git rev-parse -q --verify 5076190daded2197f62fe92cf69674488be44175^{commit} 5076190daded2197f62fe92cf69674488be44175 already have revision, skipping fetch # git checkout -q -f -B kisskb 5076190daded2197f62fe92cf69674488be44175 # git clean -qxdf # < git log -1 # commit 5076190daded2197f62fe92cf69674488be44175 # Author: Linus Torvalds # Date: Tue Mar 17 11:04:09 2020 -0700 # # mm: slub: be more careful about the double cmpxchg of freelist # # This is just a cleanup addition to Jann's fix to properly update the # transaction ID for the slub slowpath in commit fd4d9c7d0c71 ("mm: slub: # add missing TID bump.."). # # The transaction ID is what protects us against any concurrent accesses, # but we should really also make sure to make the 'freelist' comparison # itself always use the same freelist value that we then used as the new # next free pointer. # # Jann points out that if we do all of this carefully, we could skip the # transaction ID update for all the paths that only remove entries from # the lists, and only update the TID when adding entries (to avoid the ABA # issue with cmpxchg and list handling re-adding a previously seen value). # # But this patch just does the "make sure to cmpxchg the same value we # used" rather than then try to be clever. # # Acked-by: Jann Horn # Signed-off-by: Linus Torvalds # < /opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version # < git log --format=%s --max-count=1 5076190daded2197f62fe92cf69674488be44175 # < make -s -j 48 ARCH=powerpc O=/kisskb/build/linus-rand_powerpc-randconfig_powerpc-gcc9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux- randconfig KCONFIG_SEED=0xB16FB2FC # Added to kconfig CONFIG_STANDALONE=y # Added to kconfig CONFIG_BUILD_DOCSRC=n # Added to kconfig CONFIG_MODULE_SIG=n # Added to kconfig CONFIG_CPU_BIG_ENDIAN=y # Added to kconfig CONFIG_PPC64=y # Added to kconfig CONFIG_PPC_DISABLE_WERROR=y # Added to kconfig CONFIG_SECTION_MISMATCH_WARN_ONLY=y # Added to kconfig CONFIG_PREVENT_FIRMWARE_BUILD=y # Added to kconfig CONFIG_CC_STACKPROTECTOR_STRONG=n # Added to kconfig CONFIG_GCC_PLUGINS=n # Added to kconfig CONFIG_LD_HEAD_STUB_CATCH=y # Added to kconfig CONFIG_TRIM_UNUSED_KSYMS=n # Added to kconfig CONFIG_UBSAN=n # < make -s -j 48 ARCH=powerpc O=/kisskb/build/linus-rand_powerpc-randconfig_powerpc-gcc9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux- help # make -s -j 48 ARCH=powerpc O=/kisskb/build/linus-rand_powerpc-randconfig_powerpc-gcc9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux- olddefconfig .config:5278:warning: override: reassigning to symbol PPC_DISABLE_WERROR .config:5279:warning: override: reassigning to symbol SECTION_MISMATCH_WARN_ONLY .config:5280:warning: override: reassigning to symbol PREVENT_FIRMWARE_BUILD .config:5283:warning: override: reassigning to symbol LD_HEAD_STUB_CATCH .config:5284:warning: override: reassigning to symbol TRIM_UNUSED_KSYMS .config:5285:warning: override: reassigning to symbol UBSAN # make -s -j 48 ARCH=powerpc O=/kisskb/build/linus-rand_powerpc-randconfig_powerpc-gcc9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux- /kisskb/src/arch/powerpc/platforms/cell/spufs/sched.c:1061:12: warning: 'show_spu_loadavg' defined but not used [-Wunused-function] 1061 | static int show_spu_loadavg(struct seq_file *s, void *private) | ^~~~~~~~~~~~~~~~ /kisskb/src/arch/powerpc/kernel/eeh.c:1773:12: warning: 'proc_eeh_show' defined but not used [-Wunused-function] 1773 | static int proc_eeh_show(struct seq_file *m, void *v) | ^~~~~~~~~~~~~ /kisskb/src/kernel/watchdog.c:47:23: warning: 'watchdog_allowed_mask' defined but not used [-Wunused-variable] 47 | static struct cpumask watchdog_allowed_mask __read_mostly; | ^~~~~~~~~~~~~~~~~~~~~ /kisskb/src/drivers/macintosh/via-pmu.c:901:12: warning: 'pmu_battery_proc_show' defined but not used [-Wunused-function] 901 | static int pmu_battery_proc_show(struct seq_file *m, void *v) | ^~~~~~~~~~~~~~~~~~~~~ /kisskb/src/drivers/macintosh/via-pmu.c:875:12: warning: 'pmu_irqstats_proc_show' defined but not used [-Wunused-function] 875 | static int pmu_irqstats_proc_show(struct seq_file *m, void *v) | ^~~~~~~~~~~~~~~~~~~~~~ /kisskb/src/drivers/macintosh/via-pmu.c:864:12: warning: 'pmu_info_proc_show' defined but not used [-Wunused-function] 864 | static int pmu_info_proc_show(struct seq_file *m, void *v) | ^~~~~~~~~~~~~~~~~~ /opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld: warning: orphan section `.gnu.hash' from `linker stubs' being placed in section `.gnu.hash' /opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld: drivers/macintosh/via-pmu-event.o: in function `.via_pmu_event_init': via-pmu-event.c:(.init.text+0x30): undefined reference to `.input_allocate_device' /opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld: via-pmu-event.c:(.init.text+0xf0): undefined reference to `.input_register_device' /opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld: via-pmu-event.c:(.init.text+0x104): undefined reference to `.input_free_device' /opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld: drivers/macintosh/via-pmu-event.o: in function `.via_pmu_event': via-pmu-event.c:(.text.via_pmu_event+0x8c): undefined reference to `.input_event' /opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld: via-pmu-event.c:(.text.via_pmu_event+0xa8): undefined reference to `.input_event' /opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld: via-pmu-event.c:(.text.via_pmu_event+0xe8): undefined reference to `.input_event' make[1]: *** [/kisskb/src/Makefile:1078: vmlinux] Error 1 make: *** [Makefile:180: sub-make] Error 2 Command 'make -s -j 48 ARCH=powerpc O=/kisskb/build/linus-rand_powerpc-randconfig_powerpc-gcc9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux- ' returned non-zero exit status 2 # rm -rf /kisskb/build/linus-rand_powerpc-randconfig_powerpc-gcc9 # Build took: 0:03:49.467742