# git rev-parse -q --verify 9580b71b5a7863c24a9bd18bcd2ad759b86b1eff^{commit}
9580b71b5a7863c24a9bd18bcd2ad759b86b1eff
already have revision, skipping fetch
# git checkout -q -f -B kisskb 9580b71b5a7863c24a9bd18bcd2ad759b86b1eff
# git clean -qxdf
# < git log -1
# commit 9580b71b5a7863c24a9bd18bcd2ad759b86b1eff
# Author: Christophe Leroy <christophe.leroy@c-s.fr>
# Date:   Wed Feb 27 11:45:30 2019 +0000
# 
#     powerpc/32: Clear on-stack exception marker upon exception return
#     
#     Clear the on-stack STACK_FRAME_REGS_MARKER on exception exit in order
#     to avoid confusing stacktrace like the one below.
#     
#       Call Trace:
#       [c0e9dca0] [c01c42a0] print_address_description+0x64/0x2bc (unreliable)
#       [c0e9dcd0] [c01c4684] kasan_report+0xfc/0x180
#       [c0e9dd10] [c0895130] memchr+0x24/0x74
#       [c0e9dd30] [c00a9e38] msg_print_text+0x124/0x574
#       [c0e9dde0] [c00ab710] console_unlock+0x114/0x4f8
#       [c0e9de40] [c00adc60] vprintk_emit+0x188/0x1c4
#       --- interrupt: c0e9df00 at 0x400f330
#           LR = init_stack+0x1f00/0x2000
#       [c0e9de80] [c00ae3c4] printk+0xa8/0xcc (unreliable)
#       [c0e9df20] [c0c27e44] early_irq_init+0x38/0x108
#       [c0e9df50] [c0c15434] start_kernel+0x310/0x488
#       [c0e9dff0] [00003484] 0x3484
#     
#     With this patch the trace becomes:
#     
#       Call Trace:
#       [c0e9dca0] [c01c42c0] print_address_description+0x64/0x2bc (unreliable)
#       [c0e9dcd0] [c01c46a4] kasan_report+0xfc/0x180
#       [c0e9dd10] [c0895150] memchr+0x24/0x74
#       [c0e9dd30] [c00a9e58] msg_print_text+0x124/0x574
#       [c0e9dde0] [c00ab730] console_unlock+0x114/0x4f8
#       [c0e9de40] [c00adc80] vprintk_emit+0x188/0x1c4
#       [c0e9de80] [c00ae3e4] printk+0xa8/0xcc
#       [c0e9df20] [c0c27e44] early_irq_init+0x38/0x108
#       [c0e9df50] [c0c15434] start_kernel+0x310/0x488
#       [c0e9dff0] [00003484] 0x3484
#     
#     Cc: stable@vger.kernel.org
#     Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
#     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 9580b71b5a7863c24a9bd18bcd2ad759b86b1eff
# < make -s -j 8 ARCH=powerpc O=/kisskb/build/powerpc-next_powernv_defconfig_ppc64le-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  powernv_defconfig
# make -s -j 8 ARCH=powerpc O=/kisskb/build/powerpc-next_powernv_defconfig_ppc64le-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
WARNING: modpost: Found 2 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_powernv_defconfig_ppc64le-gcc5
# Build took: 0:04:03.344738