# git rev-parse -q --verify 0fc810ae3ae110f9e2fcccce80fc8c8d62f97907^{commit} 0fc810ae3ae110f9e2fcccce80fc8c8d62f97907 already have revision, skipping fetch # git checkout -q -f -B kisskb 0fc810ae3ae110f9e2fcccce80fc8c8d62f97907 # git clean -qxdf # < git log -1 # commit 0fc810ae3ae110f9e2fcccce80fc8c8d62f97907 # Author: Linus Torvalds # Date: Tue Oct 29 16:03:31 2024 -1000 # # x86/uaccess: Avoid barrier_nospec() in 64-bit copy_from_user() # # The barrier_nospec() in 64-bit copy_from_user() is slow. Instead use # pointer masking to force the user pointer to all 1's for an invalid # address. # # The kernel test robot reports a 2.6% improvement in the per_thread_ops # benchmark [1]. # # This is a variation on a patch originally by Josh Poimboeuf [2]. # # Link: https://lore.kernel.org/202410281344.d02c72a2-oliver.sang@intel.com [1] # Link: https://lore.kernel.org/5b887fe4c580214900e21f6c61095adf9a142735.1730166635.git.jpoimboe@kernel.org [2] # Tested-and-reviewed-by: Josh Poimboeuf # Cc: Kirill A. Shutemov # Signed-off-by: Linus Torvalds # < /opt/cross/kisskb/x86-64--glibc--bleeding-edge-2022.08-1/bin/x86_64-linux-gcc --version # < /opt/cross/kisskb/x86-64--glibc--bleeding-edge-2022.08-1/bin/x86_64-linux-ld --version # < git log --format=%s --max-count=1 0fc810ae3ae110f9e2fcccce80fc8c8d62f97907 # make -s -j 32 ARCH=um O=/kisskb/build/linus_allyesconfig_um-x86_64-gcc12 CROSS_COMPILE=/opt/cross/kisskb/x86-64--glibc--bleeding-edge-2022.08-1/bin/x86_64-linux- SUBARCH=x86_64 allyesconfig # Added to kconfig CONFIG_STANDALONE=y # Added to kconfig CONFIG_KCOV=n # Added to kconfig CONFIG_GCC_PLUGINS=n # Added to kconfig CONFIG_GCC_PLUGIN_CYC_COMPLEXITY=n # Added to kconfig CONFIG_GCC_PLUGIN_SANCOV=n # Added to kconfig CONFIG_GCC_PLUGIN_LATENT_ENTROPY=n # Added to kconfig CONFIG_GCC_PLUGIN_STRUCTLEAK=n # Added to kconfig CONFIG_GCC_PLUGIN_RANDSTRUCT=n # Added to kconfig CONFIG_UML_NET=n # Added to kconfig CONFIG_UML_NET_ETHERTAP=n # Added to kconfig CONFIG_UML_NET_TUNTAP=n # Added to kconfig CONFIG_UML_NET_SLIP=n # Added to kconfig CONFIG_UML_NET_DAEMON=n # Added to kconfig CONFIG_UML_NET_VDE=n # Added to kconfig CONFIG_UML_NET_MCAST=n # Added to kconfig CONFIG_UML_NET_PCAP=n # Added to kconfig CONFIG_UML_NET_SLIRP=n # Added to kconfig CONFIG_GCOV_KERNEL=n # Added to kconfig CONFIG_DEBUG_INFO_BTF=n # Added to kconfig CONFIG_BPF_PRELOAD=n # Added to kconfig CONFIG_SPI_STM32_QSPI=n # < make -s -j 32 ARCH=um O=/kisskb/build/linus_allyesconfig_um-x86_64-gcc12 CROSS_COMPILE=/opt/cross/kisskb/x86-64--glibc--bleeding-edge-2022.08-1/bin/x86_64-linux- SUBARCH=x86_64 help # make -s -j 32 ARCH=um O=/kisskb/build/linus_allyesconfig_um-x86_64-gcc12 CROSS_COMPILE=/opt/cross/kisskb/x86-64--glibc--bleeding-edge-2022.08-1/bin/x86_64-linux- SUBARCH=x86_64 olddefconfig .config:15115:warning: override: reassigning to symbol GCC_PLUGIN_LATENT_ENTROPY .config:15119:warning: override: reassigning to symbol UML_NET_ETHERTAP .config:15121:warning: override: reassigning to symbol UML_NET_SLIP .config:15124:warning: override: reassigning to symbol UML_NET_MCAST # make -s -j 32 ARCH=um O=/kisskb/build/linus_allyesconfig_um-x86_64-gcc12 CROSS_COMPILE=/opt/cross/kisskb/x86-64--glibc--bleeding-edge-2022.08-1/bin/x86_64-linux- SUBARCH=x86_64 /kisskb/src/lib/iomap.c:156:5: error: no previous prototype for ‘ioread64_lo_hi’ [-Werror=missing-prototypes] 156 | u64 ioread64_lo_hi(const void __iomem *addr) | ^~~~~~~~~~~~~~ /kisskb/src/lib/iomap.c:163:5: error: no previous prototype for ‘ioread64_hi_lo’ [-Werror=missing-prototypes] 163 | u64 ioread64_hi_lo(const void __iomem *addr) | ^~~~~~~~~~~~~~ /kisskb/src/lib/iomap.c:170:5: error: no previous prototype for ‘ioread64be_lo_hi’ [-Werror=missing-prototypes] 170 | u64 ioread64be_lo_hi(const void __iomem *addr) | ^~~~~~~~~~~~~~~~ /kisskb/src/lib/iomap.c:178:5: error: no previous prototype for ‘ioread64be_hi_lo’ [-Werror=missing-prototypes] 178 | u64 ioread64be_hi_lo(const void __iomem *addr) | ^~~~~~~~~~~~~~~~ /kisskb/src/lib/iomap.c:264:6: error: no previous prototype for ‘iowrite64_lo_hi’ [-Werror=missing-prototypes] 264 | void iowrite64_lo_hi(u64 val, void __iomem *addr) | ^~~~~~~~~~~~~~~ /kisskb/src/lib/iomap.c:272:6: error: no previous prototype for ‘iowrite64_hi_lo’ [-Werror=missing-prototypes] 272 | void iowrite64_hi_lo(u64 val, void __iomem *addr) | ^~~~~~~~~~~~~~~ /kisskb/src/lib/iomap.c:280:6: error: no previous prototype for ‘iowrite64be_lo_hi’ [-Werror=missing-prototypes] 280 | void iowrite64be_lo_hi(u64 val, void __iomem *addr) | ^~~~~~~~~~~~~~~~~ /kisskb/src/lib/iomap.c:288:6: error: no previous prototype for ‘iowrite64be_hi_lo’ [-Werror=missing-prototypes] 288 | void iowrite64be_hi_lo(u64 val, void __iomem *addr) | ^~~~~~~~~~~~~~~~~ cc1: all warnings being treated as errors make[4]: *** [/kisskb/src/scripts/Makefile.build:229: lib/iomap.o] Error 1 make[4]: *** Waiting for unfinished jobs.... make[3]: *** [/kisskb/src/scripts/Makefile.build:478: lib] Error 2 make[3]: *** Waiting for unfinished jobs.... make[2]: *** [/kisskb/src/Makefile:1936: .] Error 2 make[1]: *** [/kisskb/src/Makefile:224: __sub-make] Error 2 make: *** [Makefile:224: __sub-make] Error 2 Command 'make -s -j 32 ARCH=um O=/kisskb/build/linus_allyesconfig_um-x86_64-gcc12 CROSS_COMPILE=/opt/cross/kisskb/x86-64--glibc--bleeding-edge-2022.08-1/bin/x86_64-linux- SUBARCH=x86_64 ' returned non-zero exit status 2. # rm -rf /kisskb/build/linus_allyesconfig_um-x86_64-gcc12 # Build took: 0:17:33.333674