# git rev-parse -q --verify 49c7f0bdba27e02d44014e07d9d7723058b7b876^{commit}
49c7f0bdba27e02d44014e07d9d7723058b7b876
already have revision, skipping fetch
# git checkout -q -f -B kisskb 49c7f0bdba27e02d44014e07d9d7723058b7b876
# git clean -qxdf
# < git log -1
# commit 49c7f0bdba27e02d44014e07d9d7723058b7b876
# Author: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
# Date:   Thu Aug 27 09:39:31 2020 +0530
# 
#     powerpc/book3s64/pkeys: Optimize FTR_KUAP and FTR_KUEP disabled case
#     
#     If FTR_KUAP is disabled kernel will continue to run with the same AMR
#     value with which it was entered. Hence there is a high chance that
#     we can return without restoring the AMR value. This also helps the case
#     when applications are not using the pkey feature. In this case, different
#     applications will have the same AMR values and hence we can avoid restoring
#     AMR in this case too.
#     
#     Also avoid isync() if not really needed.
#     
#     Do the same for IAMR.
#     
#     null-syscall benchmark results:
#     
#     With smap/smep disabled:
#     Without patch:
#             957.95 ns    2778.17 cycles
#     With patch:
#             858.38 ns    2489.30 cycles
#     
#     With smap/smep enabled:
#     Without patch:
#             1017.26 ns    2950.36 cycles
#     With patch:
#             1021.51 ns    2962.44 cycles
#     
#     Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20200827040931.297759-24-aneesh.kumar@linux.ibm.com
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version
# < git log --format=%s --max-count=1 49c7f0bdba27e02d44014e07d9d7723058b7b876
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next-rand_powerpc-randconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  randconfig
KCONFIG_SEED=0xBDA172E0
# 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/powerpc-next-rand_powerpc-randconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  help
# make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next-rand_powerpc-randconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  olddefconfig
.config:6140:warning: override: reassigning to symbol STANDALONE
.config:6144:warning: override: reassigning to symbol PPC64
.config:6146:warning: override: reassigning to symbol SECTION_MISMATCH_WARN_ONLY
.config:6152:warning: override: reassigning to symbol UBSAN
# make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next-rand_powerpc-randconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  
/kisskb/src/drivers/misc/habanalabs/common/habanalabs_ioctl.c: In function 'cs_counters_info':
/kisskb/src/drivers/misc/habanalabs/common/habanalabs_ioctl.c:282:9: warning: missing braces around initializer [-Wmissing-braces]
  struct hl_info_cs_counters cs_counters = {0};
         ^
/kisskb/src/drivers/misc/habanalabs/common/habanalabs_ioctl.c:282:9: warning: (near initialization for 'cs_counters.cs_counters') [-Wmissing-braces]
/kisskb/src/drivers/cpufreq/powernv-cpufreq.c: In function 'powernv_cpufreq_reboot_notifier':
/kisskb/src/drivers/cpufreq/powernv-cpufreq.c:897:1: warning: the frame size of 1264 bytes is larger than 1024 bytes [-Wframe-larger-than=]
 }
 ^
/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-ld: final link failed: Bad value
make[1]: *** [/kisskb/src/Makefile:1166: vmlinux] Error 1
make: *** [Makefile:185: __sub-make] Error 2
Command 'make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next-rand_powerpc-randconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  ' returned non-zero exit status 2
# rm -rf /kisskb/build/powerpc-next-rand_powerpc-randconfig_powerpc-gcc4.9
# Build took: 0:03:43.941071