# 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 <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-5.5.0-nolibc/sparc64-linux/bin/sparc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/sparc64-linux/bin/sparc64-linux-ld --version
# < git log --format=%s --max-count=1 0fc810ae3ae110f9e2fcccce80fc8c8d62f97907
# make -s -j 40 ARCH=sparc64 O=/kisskb/build/linus_defconfig_sparc64-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/sparc64-linux/bin/sparc64-linux-  defconfig
# < make -s -j 40 ARCH=sparc64 O=/kisskb/build/linus_defconfig_sparc64-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/sparc64-linux/bin/sparc64-linux-  help
# make -s -j 40 ARCH=sparc64 O=/kisskb/build/linus_defconfig_sparc64-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/sparc64-linux/bin/sparc64-linux-  olddefconfig
# make -s -j 40 ARCH=sparc64 O=/kisskb/build/linus_defconfig_sparc64-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/sparc64-linux/bin/sparc64-linux-  
<stdin>:1519:2: warning: #warning syscall clone3 not implemented [-Wcpp]
cc1: warning: unrecognized command line option '-Wno-shift-negative-value'
cc1: warning: unrecognized command line option '-Wno-stringop-overflow'
/kisskb/src/arch/sparc/vdso/vclock_gettime.c:254:1: warning: no previous prototype for '__vdso_clock_gettime' [-Wmissing-prototypes]
 __vdso_clock_gettime(clockid_t clock, struct __kernel_old_timespec *ts)
 ^
/kisskb/src/arch/sparc/vdso/vclock_gettime.c:282:1: warning: no previous prototype for '__vdso_clock_gettime_stick' [-Wmissing-prototypes]
 __vdso_clock_gettime_stick(clockid_t clock, struct __kernel_old_timespec *ts)
 ^
/kisskb/src/arch/sparc/vdso/vclock_gettime.c:307:1: warning: no previous prototype for '__vdso_gettimeofday' [-Wmissing-prototypes]
 __vdso_gettimeofday(struct __kernel_old_timeval *tv, struct timezone *tz)
 ^
/kisskb/src/arch/sparc/vdso/vclock_gettime.c:343:1: warning: no previous prototype for '__vdso_gettimeofday_stick' [-Wmissing-prototypes]
 __vdso_gettimeofday_stick(struct __kernel_old_timeval *tv, struct timezone *tz)
 ^
cc1: warning: unrecognized command line option '-Wno-shift-negative-value'
cc1: warning: unrecognized command line option '-Wno-stringop-overflow'
In file included from /kisskb/src/arch/sparc/vdso/vdso32/vclock_gettime.c:22:0:
/kisskb/src/arch/sparc/vdso/vdso32/../vclock_gettime.c:254:1: warning: no previous prototype for '__vdso_clock_gettime' [-Wmissing-prototypes]
 __vdso_clock_gettime(clockid_t clock, struct __kernel_old_timespec *ts)
 ^
/kisskb/src/arch/sparc/vdso/vdso32/../vclock_gettime.c:282:1: warning: no previous prototype for '__vdso_clock_gettime_stick' [-Wmissing-prototypes]
 __vdso_clock_gettime_stick(clockid_t clock, struct __kernel_old_timespec *ts)
 ^
/kisskb/src/arch/sparc/vdso/vdso32/../vclock_gettime.c:307:1: warning: no previous prototype for '__vdso_gettimeofday' [-Wmissing-prototypes]
 __vdso_gettimeofday(struct __kernel_old_timeval *tv, struct timezone *tz)
 ^
/kisskb/src/arch/sparc/vdso/vdso32/../vclock_gettime.c:343:1: warning: no previous prototype for '__vdso_gettimeofday_stick' [-Wmissing-prototypes]
 __vdso_gettimeofday_stick(struct __kernel_old_timeval *tv, struct timezone *tz)
 ^
cc1: warning: unrecognized command line option '-Wno-shift-negative-value'
cc1: warning: unrecognized command line option '-Wno-stringop-overflow'
/kisskb/src/kernel/fork.c: In function '__do_sys_clone3':
/kisskb/src/kernel/fork.c:3075:2: warning: #warning clone3() entry point is missing, please fix [-Wcpp]
 #warning clone3() entry point is missing, please fix
  ^
/kisskb/src/kernel/fork.c: At top level:
cc1: warning: unrecognized command line option '-Wno-shift-negative-value'
cc1: warning: unrecognized command line option '-Wno-stringop-overflow'
/kisskb/src/kernel/fork.c:3075:2: warning: #warning clone3() entry point is missing, please fix [-Wcpp]
 #warning clone3() entry point is missing, please fix
  ^
cc1: warning: unrecognized command line option '-Wno-shift-negative-value'
cc1: warning: unrecognized command line option '-Wno-stringop-overflow'
WARNING: modpost: EXPORT symbol "_mcount" [vmlinux] version generation failed, symbol will not be versioned.
Is "_mcount" prototyped in <asm/asm-prototypes.h>?
Completed OK
# rm -rf /kisskb/build/linus_defconfig_sparc64-gcc5
# Build took: 0:00:46.151684