# git rev-parse -q --verify 0fc810ae3ae110f9e2fcccce80fc8c8d62f97907^{commit}
# git fetch -q -n -f git://fs.ozlabs.ibm.com/kernel/linus master
# git rev-parse -q --verify 0fc810ae3ae110f9e2fcccce80fc8c8d62f97907^{commit}
0fc810ae3ae110f9e2fcccce80fc8c8d62f97907
# git checkout -q -f -B kisskb 0fc810ae3ae110f9e2fcccce80fc8c8d62f97907
# git clean -qxdf
# < git log -1
# commit 0fc810ae3ae110f9e2fcccce80fc8c8d62f97907
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# 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 <jpoimboe@kernel.org>
#     Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
#     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
# < /opt/cross/kisskb/korg/gcc-13.1.0-nolibc/x86_64-linux/bin/x86_64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-13.1.0-nolibc/x86_64-linux/bin/x86_64-linux-ld --version
# < git log --format=%s --max-count=1 0fc810ae3ae110f9e2fcccce80fc8c8d62f97907
# make -s -j 24 ARCH=x86_64 O=/kisskb/build/linus_allmodconfig_x86_64-gcc13 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-13.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  allmodconfig
# Added to kconfig CONFIG_BUILD_DOCSRC=n
# Added to kconfig CONFIG_MODULE_SIG=n
# Added to kconfig CONFIG_SAMPLES=n
# Added to kconfig CONFIG_GCC_PLUGINS=n
# Added to kconfig 
# < make -s -j 24 ARCH=x86_64 O=/kisskb/build/linus_allmodconfig_x86_64-gcc13 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-13.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  help
# make -s -j 24 ARCH=x86_64 O=/kisskb/build/linus_allmodconfig_x86_64-gcc13 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-13.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  olddefconfig
# make -s -j 24 ARCH=x86_64 O=/kisskb/build/linus_allmodconfig_x86_64-gcc13 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-13.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  
Completed OK
# rm -rf /kisskb/build/linus_allmodconfig_x86_64-gcc13
# Build took: 1:06:07.494431