# git rev-parse -q --verify 26a7f2efa8557bc235ef632d477b1aef6612bbc8^{commit}
26a7f2efa8557bc235ef632d477b1aef6612bbc8
already have revision, skipping fetch
# git checkout -q -f -B kisskb 26a7f2efa8557bc235ef632d477b1aef6612bbc8
# git clean -qxdf
# git log -1
commit 26a7f2efa8557bc235ef632d477b1aef6612bbc8
Author: Segher Boessenkool <segher@kernel.crashing.org>
Date:   Wed Feb 28 17:02:49 2018 -0800

    powerpc: Keep const vars out of writable .sdata
    
    Newer gcc will support "-mno-readonly-in-sdata"[1], which makes sure that
    the optimization on PPC32 for variables getting moved into the .sdata
    section will not apply to const variables (which must be in .rodata).
    
    This was originally noticed in mm/rodata_test.c when rodata_test_data
    was not static:
    
    c0695034 g     O .data	00000004 rodata_test_data
    
    After this patch with an updated compiler, this is correctly in .rodata.
    
    [1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82411
    
    Reported-by: Christophe Leroy <christophe.leroy@c-s.fr>
    Signed-off-by: Segher Boessenkool <segher@kernel.crashing.org>
    Signed-off-by: Kees Cook <keescook@chromium.org>
    Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-gcc --version
# < git log --format=%s --max-count=1 26a7f2efa8557bc235ef632d477b1aef6612bbc8
# < make -s -j 10 ARCH=powerpc O=/kisskb/build/powerpc-next_ppc64_defconfig+NO_ALTIVEC_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  ppc64_defconfig
# Added to kconfig CONFIG_ALTIVEC=n
# Added to kconfig CONFIG_PPC_TRANSACTIONAL_MEM=n
# yes \n | make -s -j 10 ARCH=powerpc O=/kisskb/build/powerpc-next_ppc64_defconfig+NO_ALTIVEC_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  oldconfig
yes: standard output: Broken pipe
yes: write error
# make -s -j 10 ARCH=powerpc O=/kisskb/build/powerpc-next_ppc64_defconfig+NO_ALTIVEC_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  
/kisskb/src/arch/powerpc/kvm/powerpc.c: In function 'kvm_arch_vcpu_ioctl_run':
/kisskb/src/arch/powerpc/kvm/powerpc.c:1611:1: error: label 'out' defined but not used [-Werror=unused-label]
cc1: all warnings being treated as errors
/kisskb/src/scripts/Makefile.build:316: recipe for target 'arch/powerpc/kvm/powerpc.o' failed
make[2]: *** [arch/powerpc/kvm/powerpc.o] Error 1
/kisskb/src/Makefile:1048: recipe for target 'arch/powerpc/kvm' failed
make[1]: *** [arch/powerpc/kvm] Error 2
make[1]: *** Waiting for unfinished jobs....
/kisskb/src/kernel/cgroup/cgroup-v1.c: In function 'cgroup1_mount':
/kisskb/src/kernel/cgroup/cgroup-v1.c:1268:20: warning: 'root' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl':
/kisskb/src/kernel/printk/printk.c:183:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/mm/swap_state.c: In function '__add_to_swap_cache':
/kisskb/src/mm/swap_state.c:135:5: warning: 'error' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/mm/hugetlb.c: In function 'alloc_pool_huge_page':
/kisskb/src/mm/hugetlb.c:1439:5: warning: 'page' may be used uninitialized in this function [-Wuninitialized]
Makefile:146: recipe for target 'sub-make' failed
make: *** [sub-make] Error 2
Command 'make -s -j 10 ARCH=powerpc O=/kisskb/build/powerpc-next_ppc64_defconfig+NO_ALTIVEC_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  ' returned non-zero exit status 2
# rm -rf /kisskb/build/powerpc-next_ppc64_defconfig+NO_ALTIVEC_powerpc
# Build took: 0:00:32.269022