# git rev-parse -q --verify f7a6947cd49b7ff4e03f1b4f7e7b223003d752ca^{commit}
f7a6947cd49b7ff4e03f1b4f7e7b223003d752ca
already have revision, skipping fetch
# git checkout -q -f -B kisskb f7a6947cd49b7ff4e03f1b4f7e7b223003d752ca
# git clean -qxdf
# < git log -1
# commit f7a6947cd49b7ff4e03f1b4f7e7b223003d752ca
# Author: Michael Ellerman <mpe@ellerman.id.au>
# Date:   Tue Jul 10 16:20:56 2018 +1000
# 
#     powerpc/uaccess: Enable get_user(u64, *p) on 32-bit
#     
#     Currently if you build a 32-bit powerpc kernel and use get_user() to
#     load a u64 value it will fail to build with eg:
#     
#       kernel/rseq.o: In function `rseq_get_rseq_cs':
#       kernel/rseq.c:123: undefined reference to `__get_user_bad'
#     
#     This is hitting the check in __get_user_size() that makes sure the
#     size we're copying doesn't exceed the size of the destination:
#     
#       #define __get_user_size(x, ptr, size, retval)
#       do {
#       	retval = 0;
#       	__chk_user_ptr(ptr);
#       	if (size > sizeof(x))
#       		(x) = __get_user_bad();
#     
#     Which doesn't immediately make sense because the size of the
#     destination is u64, but it's not really, because __get_user_check()
#     etc. internally create an unsigned long and copy into that:
#     
#       #define __get_user_check(x, ptr, size)
#       ({
#       	long __gu_err = -EFAULT;
#       	unsigned long  __gu_val = 0;
#     
#     The problem being that on 32-bit unsigned long is not big enough to
#     hold a u64. We can fix this with a trick from hpa in the x86 code, we
#     statically check the type of x and set the type of __gu_val to either
#     unsigned long or unsigned long long.
#     
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
# < /opt/cross/kisskb/gcc-5.2.0-nolibc/powerpc64le-linux/bin/powerpc64le-linux-gcc --version
# < git log --format=%s --max-count=1 f7a6947cd49b7ff4e03f1b4f7e7b223003d752ca
# < make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-next-rand_randconfig+ppc64le_ppc64le CROSS_COMPILE=/opt/cross/kisskb/gcc-5.2.0-nolibc/powerpc64le-linux/bin/powerpc64le-linux-  randconfig
KCONFIG_SEED=0x4D71379A
# 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=n
# Added to kconfig CONFIG_CPU_LITTLE_ENDIAN=y
# Added to kconfig CONFIG_PPC64=y
# Added to kconfig CONFIG_PPC_BOOK3E_64=n
# Added to kconfig CONFIG_PPC_BOOK3S_64=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_LD_HEAD_STUB_CATCH=y
# make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-next-rand_randconfig+ppc64le_ppc64le CROSS_COMPILE=/opt/cross/kisskb/gcc-5.2.0-nolibc/powerpc64le-linux/bin/powerpc64le-linux-  olddefconfig
# make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-next-rand_randconfig+ppc64le_ppc64le CROSS_COMPILE=/opt/cross/kisskb/gcc-5.2.0-nolibc/powerpc64le-linux/bin/powerpc64le-linux-  
/kisskb/src/net/Makefile:24: CC cannot link executables. Skipping bpfilter.
lib/raid6/int8.c: In function 'raid6_int8_xor_syndrome':
lib/raid6/int8.c:328:1: warning: the frame size of 1152 bytes is larger than 1024 bytes [-Wframe-larger-than=]
 }
 ^
/kisskb/src/drivers/gpu/drm/amd/amdgpu/soc15.c: In function 'soc15_set_ip_blocks':
/kisskb/src/drivers/gpu/drm/amd/amdgpu/soc15.c:532:3: warning: #warning "Enable CONFIG_DRM_AMD_DC for display support on SOC15." [-Wcpp]
 # warning "Enable CONFIG_DRM_AMD_DC for display support on SOC15."
   ^
/kisskb/src/drivers/gpu/drm/amd/amdgpu/soc15.c:551:3: warning: #warning "Enable CONFIG_DRM_AMD_DC for display support on SOC15." [-Wcpp]
 # warning "Enable CONFIG_DRM_AMD_DC for display support on SOC15."
   ^
/kisskb/src/drivers/tty/rocket.c: In function 'get_ports.isra.1':
/kisskb/src/drivers/tty/rocket.c:1241:1: warning: the frame size of 1072 bytes is larger than 1024 bytes [-Wframe-larger-than=]
 }
 ^
/kisskb/src/drivers/gpu/drm/nouveau/dispnv04/tvmodesnv17.c: In function 'nv17_tv_update_rescaler':
/kisskb/src/drivers/gpu/drm/nouveau/dispnv04/tvmodesnv17.c:541:1: warning: the frame size of 1440 bytes is larger than 1024 bytes [-Wframe-larger-than=]
 }
 ^
/kisskb/src/crypto/twofish_common.c: In function '__twofish_setkey':
/kisskb/src/crypto/twofish_common.c:699:1: warning: the frame size of 5776 bytes is larger than 1024 bytes [-Wframe-larger-than=]
 }
 ^
WARNING: modpost: Found 3 section mismatch(es).
To see full details build your kernel with:
'make CONFIG_DEBUG_SECTION_MISMATCH=y'
Completed OK
# rm -rf /kisskb/build/powerpc-next-rand_randconfig+ppc64le_ppc64le
# Build took: 0:01:46.623857