# git rev-parse -q --verify de5cb0dcb74c294ec527eddfe5094acfdb21ff21^{commit}
de5cb0dcb74c294ec527eddfe5094acfdb21ff21
already have revision, skipping fetch
# git checkout -q -f -B kisskb de5cb0dcb74c294ec527eddfe5094acfdb21ff21
# git clean -qxdf
# < git log -1
# commit de5cb0dcb74c294ec527eddfe5094acfdb21ff21
# Merge: af9c191ac2a0 533ab223aa1a
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Sun Sep 22 11:19:35 2024 -0700
# 
#     Merge branch 'address-masking'
#     
#     Merge user access fast validation using address masking.
#     
#     This allows architectures to optionally use a data dependent address
#     masking model instead of a conditional branch for validating user
#     accesses.  That avoids the Spectre-v1 speculation barriers.
#     
#     Right now only x86-64 takes advantage of this, and not all architectures
#     will be able to do it.  It requires a guard region between the user and
#     kernel address spaces (so that you can't overflow from one to the
#     other), and an easy way to generate a guaranteed-to-fault address for
#     invalid user pointers.
#     
#     Also note that this currently assumes that there is no difference
#     between user read and write accesses.  If extended to architectures like
#     powerpc, we'll also need to separate out the user read-vs-write cases.
#     
#     * address-masking:
#       x86: make the masked_user_access_begin() macro use its argument only once
#       x86: do the user address masking outside the user access area
#       x86: support user address masking instead of non-speculative conditional
# < /opt/cross/kisskb/korg/gcc-13.1.0-nolibc/sparc64-linux/bin/sparc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-13.1.0-nolibc/sparc64-linux/bin/sparc64-linux-ld --version
# < git log --format=%s --max-count=1 de5cb0dcb74c294ec527eddfe5094acfdb21ff21
# make -s -j 160 ARCH=sparc64 O=/kisskb/build/linus_allmodconfig_sparc64-gcc13 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-13.1.0-nolibc/sparc64-linux/bin/sparc64-linux-  allmodconfig
# < make -s -j 160 ARCH=sparc64 O=/kisskb/build/linus_allmodconfig_sparc64-gcc13 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-13.1.0-nolibc/sparc64-linux/bin/sparc64-linux-  help
# make -s -j 160 ARCH=sparc64 O=/kisskb/build/linus_allmodconfig_sparc64-gcc13 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-13.1.0-nolibc/sparc64-linux/bin/sparc64-linux-  olddefconfig
# make -s -j 160 ARCH=sparc64 O=/kisskb/build/linus_allmodconfig_sparc64-gcc13 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-13.1.0-nolibc/sparc64-linux/bin/sparc64-linux-  
<stdin>:1519:2: warning: #warning syscall clone3 not implemented [-Wcpp]
/kisskb/src/arch/sparc/vdso/vclock_gettime.c:254:1: error: no previous prototype for '__vdso_clock_gettime' [-Werror=missing-prototypes]
  254 | __vdso_clock_gettime(clockid_t clock, struct __kernel_old_timespec *ts)
      | ^~~~~~~~~~~~~~~~~~~~
/kisskb/src/arch/sparc/vdso/vclock_gettime.c:282:1: error: no previous prototype for '__vdso_clock_gettime_stick' [-Werror=missing-prototypes]
  282 | __vdso_clock_gettime_stick(clockid_t clock, struct __kernel_old_timespec *ts)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/arch/sparc/vdso/vclock_gettime.c:307:1: error: no previous prototype for '__vdso_gettimeofday' [-Werror=missing-prototypes]
  307 | __vdso_gettimeofday(struct __kernel_old_timeval *tv, struct timezone *tz)
      | ^~~~~~~~~~~~~~~~~~~
/kisskb/src/arch/sparc/vdso/vclock_gettime.c:343:1: error: no previous prototype for '__vdso_gettimeofday_stick' [-Werror=missing-prototypes]
  343 | __vdso_gettimeofday_stick(struct __kernel_old_timeval *tv, struct timezone *tz)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
make[5]: *** [/kisskb/src/scripts/Makefile.build:244: arch/sparc/vdso/vclock_gettime.o] Error 1
make[4]: *** [/kisskb/src/scripts/Makefile.build:485: arch/sparc/vdso] Error 2
make[4]: *** Waiting for unfinished jobs....
/kisskb/src/kernel/fork.c: In function '__do_sys_clone3':
/kisskb/src/kernel/fork.c:3078:2: error: #warning clone3() entry point is missing, please fix [-Werror=cpp]
 3078 | #warning clone3() entry point is missing, please fix
      |  ^~~~~~~
cc1: all warnings being treated as errors
make[4]: *** [/kisskb/src/scripts/Makefile.build:244: kernel/fork.o] Error 1
make[4]: *** Waiting for unfinished jobs....
make[3]: *** [/kisskb/src/scripts/Makefile.build:485: arch/sparc] Error 2
make[3]: *** Waiting for unfinished jobs....
make[3]: *** [/kisskb/src/scripts/Makefile.build:485: kernel] Error 2
make[2]: *** [/kisskb/src/Makefile:1926: .] Error 2
make[1]: *** [/kisskb/src/Makefile:224: __sub-make] Error 2
make: *** [Makefile:224: __sub-make] Error 2
Command 'make -s -j 160 ARCH=sparc64 O=/kisskb/build/linus_allmodconfig_sparc64-gcc13 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-13.1.0-nolibc/sparc64-linux/bin/sparc64-linux-  ' returned non-zero exit status 2.
# rm -rf /kisskb/build/linus_allmodconfig_sparc64-gcc13
# Build took: 0:10:38.712397