# git rev-parse -q --verify a41426c5f97c5492ce7988d729dd65e592b86f6f^{commit}
# git fetch -q -n -f git://gitlab.ozlabs.ibm.com/linuxppc/linux.git fixes-test
# git rev-parse -q --verify a41426c5f97c5492ce7988d729dd65e592b86f6f^{commit}
a41426c5f97c5492ce7988d729dd65e592b86f6f
# git checkout -q -f -B kisskb a41426c5f97c5492ce7988d729dd65e592b86f6f
# git clean -qxdf
# < git log -1
# commit a41426c5f97c5492ce7988d729dd65e592b86f6f
# Author: Christophe Leroy <christophe.leroy@c-s.fr>
# Date:   Fri Apr 17 11:58:36 2020 +0000
# 
#     powerpc/mm: Fix CONFIG_PPC_KUAP_DEBUG on PPC32
#     
#     CONFIG_PPC_KUAP_DEBUG is not selectable because it depends on PPC_32
#     which doesn't exists.
#     
#     Fixing it leads to a deadlock due to a vital register getting
#     clobbered in _switch().
#     
#     Change dependency to PPC32 and use r0 instead of r4 in _switch()
#     
#     Fixes: e2fb9f544431 ("powerpc/32: Prepare for Kernel Userspace Access Protection")
#     Cc: stable@vger.kernel.org # v5.2+
#     Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/540242f7d4573f7cdf1b3bf46bb35f743b2cd68f.1587124651.git.christophe.leroy@c-s.fr
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/sh4-linux/bin/sh4-linux-gcc --version
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/sh4-linux/bin/sh4-linux-ld --version
# < git log --format=%s --max-count=1 a41426c5f97c5492ce7988d729dd65e592b86f6f
# < make -s -j 24 ARCH=sh O=/kisskb/build/powerpc-fixes_sh-defconfig_sh4-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/sh4-linux/bin/sh4-linux-  defconfig
# < make -s -j 24 ARCH=sh O=/kisskb/build/powerpc-fixes_sh-defconfig_sh4-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/sh4-linux/bin/sh4-linux-  help
# make -s -j 24 ARCH=sh O=/kisskb/build/powerpc-fixes_sh-defconfig_sh4-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/sh4-linux/bin/sh4-linux-  olddefconfig
# make -s -j 24 ARCH=sh O=/kisskb/build/powerpc-fixes_sh-defconfig_sh4-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/sh4-linux/bin/sh4-linux-  
  Generating include/generated/machtypes.h
<stdin>:1511:2: warning: #warning syscall clone3 not implemented [-Wcpp]
/kisskb/src/arch/sh/kernel/cpu/sh4/../sh3/../../entry-common.S: Assembler messages:
/kisskb/src/arch/sh/kernel/cpu/sh4/../sh3/../../entry-common.S:385: Warning: overflow in branch to syscall_exit_work; converted into longer instruction sequence
/kisskb/src/arch/sh/kernel/cpu/sh4/../sh3/../../entry-common.S:388: Warning: overflow in branch to syscall_exit_work; converted into longer instruction sequence
/kisskb/src/arch/sh/mm/init.c: In function 'arch_add_memory':
/kisskb/src/arch/sh/mm/init.c:416:3: error: expected ')' before 'return'
/kisskb/src/arch/sh/mm/init.c:424:1: error: expected expression before '}' token
/kisskb/src/arch/sh/mm/init.c:413:6: error: unused variable 'ret' [-Werror=unused-variable]
/kisskb/src/arch/sh/mm/init.c:412:16: error: unused variable 'nr_pages' [-Werror=unused-variable]
/kisskb/src/arch/sh/mm/init.c:411:16: error: unused variable 'start_pfn' [-Werror=unused-variable]
/kisskb/src/arch/sh/mm/init.c:424:1: error: control reaches end of non-void function [-Werror=return-type]
cc1: all warnings being treated as errors
make[2]: *** [/kisskb/src/scripts/Makefile.build:266: arch/sh/mm/init.o] Error 1
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [/kisskb/src/Makefile:1722: arch/sh/mm] Error 2
make[1]: *** Waiting for unfinished jobs....
/kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl':
/kisskb/src/kernel/printk/printk.c:204:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/mm/vmstat.c: In function 'sysctl_vm_numa_stat_handler':
/kisskb/src/mm/vmstat.c:90:5: warning: 'oldval' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/mm/hugetlb.c: In function 'alloc_pool_huge_page':
/kisskb/src/mm/hugetlb.c:1774:5: warning: 'page' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/kernel/trace/trace_events.c: In function 'event_create_dir':
/kisskb/src/kernel/trace/trace_events.c:2189:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/fs/proc/inode.c: In function 'proc_reg_open':
/kisskb/src/include/linux/list.h:72:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/fs/proc/inode.c:471:21: note: 'pdeo' was declared here
/kisskb/src/kernel/futex.c: In function 'do_futex':
/kisskb/src/kernel/futex.c:1676:3: warning: 'oldval' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/kernel/futex.c:1652:6: note: 'oldval' was declared here
/kisskb/src/fs/ext4/extents.c: In function 'ext4_convert_unwritten_io_end_vec':
/kisskb/src/fs/ext4/extents.c:4774:23: warning: 'ret' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/fs/ext4/readpage.c: In function 'ext4_mpage_readpages':
/kisskb/src/fs/ext4/readpage.c:416:1: warning: the frame size of 1180 bytes is larger than 1024 bytes [-Wframe-larger-than=]
/kisskb/src/fs/namei.c: In function 'handle_dots':
/kisskb/src/fs/namei.c:1805:10: warning: 'inode' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/fs/namei.c:1805:10: warning: 'seq' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/fs/mpage.c: In function '__mpage_writepage':
/kisskb/src/fs/mpage.c:690:1: warning: the frame size of 1152 bytes is larger than 1024 bytes [-Wframe-larger-than=]
/kisskb/src/fs/mpage.c: In function 'do_mpage_readpage':
/kisskb/src/fs/mpage.c:338:1: warning: the frame size of 1108 bytes is larger than 1024 bytes [-Wframe-larger-than=]
/kisskb/src/fs/io_uring.c: In function '__io_sqe_files_update':
/kisskb/src/fs/io_uring.c:6701:13: warning: 'err' may be used uninitialized in this function [-Wuninitialized]
make: *** [Makefile:180: sub-make] Error 2
Command 'make -s -j 24 ARCH=sh O=/kisskb/build/powerpc-fixes_sh-defconfig_sh4-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/sh4-linux/bin/sh4-linux-  ' returned non-zero exit status 2
# rm -rf /kisskb/build/powerpc-fixes_sh-defconfig_sh4-gcc4.6
# Build took: 0:00:42.862933