# git rev-parse -q --verify 7100e8704b61247649c50551b965e71d168df30b^{commit}
7100e8704b61247649c50551b965e71d168df30b
already have revision, skipping fetch
# git checkout -q -f -B kisskb 7100e8704b61247649c50551b965e71d168df30b
# git clean -qxdf
# < git log -1
# commit 7100e8704b61247649c50551b965e71d168df30b
# Author: Nicholas Piggin <npiggin@gmail.com>
# Date:   Fri Mar 29 17:42:57 2019 +1000
# 
#     powerpc/64s/radix: Fix radix segment exception handling
#     
#     Commit 48e7b76957 ("powerpc/64s/hash: Convert SLB miss handlers to C")
#     broke the radix-mode segment exception handler. In radix mode, this is
#     exception is not an SLB miss, rather it signals that the EA is outside
#     the range translated by any page table.
#     
#     The commit lost the radix feature alternate code patch, which can
#     cause faults to some EAs to kernel BUG at arch/powerpc/mm/slb.c:639!
#     
#     The original radix code would send faults to slb_miss_large_addr,
#     which would end up faulting due to slb_addr_limit being 0. This patch
#     sends radix directly to do_bad_slb_fault, which is a bit clearer.
#     
#     Fixes: 48e7b7695745 ("powerpc/64s/hash: Convert SLB miss handlers to C")
#     Cc: stable@vger.kernel.org # v4.20+
#     Reported-by: Anton Blanchard <anton@samba.org>
#     Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
#     Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version
# < git log --format=%s --max-count=1 7100e8704b61247649c50551b965e71d168df30b
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_powerpc-randconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  randconfig
KCONFIG_SEED=0x114106B5
# 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 
# yes \n | make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_powerpc-randconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  oldconfig
yes: standard output: Broken pipe
# make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_powerpc-randconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
<stdin>:1478:2: warning: #warning syscall pidfd_send_signal not implemented [-Wcpp]
<stdin>:1481:2: warning: #warning syscall io_uring_setup not implemented [-Wcpp]
<stdin>:1484:2: warning: #warning syscall io_uring_enter not implemented [-Wcpp]
<stdin>:1487:2: warning: #warning syscall io_uring_register not implemented [-Wcpp]
/kisskb/src/drivers/usb/misc/usbtest.c: In function 'test_queue':
/kisskb/src/drivers/usb/misc/usbtest.c:2148:1: warning: the frame size of 1120 bytes is larger than 1024 bytes [-Wframe-larger-than=]
 }
 ^
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_powerpc-randconfig_powerpc-gcc5
# Build took: 0:03:02.495734