# git rev-parse -q --verify 26a7f2efa8557bc235ef632d477b1aef6612bbc8^{commit}
# git fetch -q -n -f git://gitlab.ozlabs.ibm.com/linuxppc/linux.git next-test
# git rev-parse -q --verify 26a7f2efa8557bc235ef632d477b1aef6612bbc8^{commit}
26a7f2efa8557bc235ef632d477b1aef6612bbc8
# 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/ia64-linux/bin/ia64-linux-gcc --version
# < git log --format=%s --max-count=1 26a7f2efa8557bc235ef632d477b1aef6612bbc8
# < make -s -j 48 ARCH=ia64 O=/kisskb/build/powerpc-next_ia64-defconfig_ia64 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/ia64-linux/bin/ia64-linux-  defconfig
# make -s -j 48 ARCH=ia64 O=/kisskb/build/powerpc-next_ia64-defconfig_ia64 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/ia64-linux/bin/ia64-linux-  
<stdin>:1185:2: warning: #warning syscall perf_event_open not implemented [-Wcpp]
<stdin>:1239:2: warning: #warning syscall seccomp not implemented [-Wcpp]
<stdin>:1317:2: warning: #warning syscall pkey_mprotect not implemented [-Wcpp]
<stdin>:1320:2: warning: #warning syscall pkey_alloc not implemented [-Wcpp]
<stdin>:1323:2: warning: #warning syscall pkey_free not implemented [-Wcpp]
<stdin>:1326:2: warning: #warning syscall statx not implemented [-Wcpp]
/kisskb/src/kernel/fork.c:691:13: warning: 'task_struct_whitelist' defined but not used [-Wunused-function]
/kisskb/src/mm/vmstat.c: In function 'sysctl_vm_numa_stat_handler':
/kisskb/src/mm/vmstat.c:89:5: warning: 'oldval' 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/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]
/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/drivers/dma-buf/reservation.c: In function 'reservation_object_add_shared_fence':
/kisskb/src/drivers/dma-buf/reservation.c:207:2: warning: 'k' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/dma-buf/reservation.c:160:17: note: 'k' was declared here
/kisskb/src/fs/nfsd/nfs4xdr.c: In function 'nfsd4_encode_components_esc':
/kisskb/src/fs/nfsd/nfs4xdr.c:2043:9: warning: 'str' may be used uninitialized in this function [-Wuninitialized]
No errors detected in 21106 functions.
  Kernel: vmlinux.gz is ready
Completed OK
# rm -rf /kisskb/build/powerpc-next_ia64-defconfig_ia64
# Build took: 0:01:48.038907