# git rev-parse -q --verify 6a9dc5fd6170d0a41c8a14eb19e63d94bea5705a^{commit}
6a9dc5fd6170d0a41c8a14eb19e63d94bea5705a
already have revision, skipping fetch
# git checkout -q -f -B kisskb 6a9dc5fd6170d0a41c8a14eb19e63d94bea5705a
# git clean -qxdf
# < git log -1
# commit 6a9dc5fd6170d0a41c8a14eb19e63d94bea5705a
# Author: Gustavo A. R. Silva <gustavoars@kernel.org>
# Date:   Mon Aug 24 15:36:14 2020 -0500
# 
#     lib: Revert use of fallthrough pseudo-keyword in lib/
#     
#     The following build error for powerpc64 was reported by Nathan Chancellor:
#     
#       "$ scripts/config --file arch/powerpc/configs/powernv_defconfig -e KERNEL_XZ
#     
#        $ make -skj"$(nproc)" ARCH=powerpc CROSS_COMPILE=powerpc64le-linux- distclean powernv_defconfig zImage
#        ...
#        In file included from arch/powerpc/boot/../../../lib/decompress_unxz.c:234,
#                         from arch/powerpc/boot/decompress.c:38:
#        arch/powerpc/boot/../../../lib/xz/xz_dec_stream.c: In function 'dec_main':
#        arch/powerpc/boot/../../../lib/xz/xz_dec_stream.c:586:4: error: 'fallthrough' undeclared (first use in this function)
#          586 |    fallthrough;
#              |    ^~~~~~~~~~~
#     
#        This will end up affecting distribution configurations such as Debian
#        and OpenSUSE according to my testing. I am not sure what the solution
#        is, the PowerPC wrapper does not set -D__KERNEL__ so I am not sure
#        that compiler_attributes.h can be safely included."
#     
#     In order to avoid these sort of problems, it seems that the best
#     solution is to use /* fall through */ comments instead of the
#     fallthrough pseudo-keyword macro in lib/, for now.
#     
#     Reported-by: Nathan Chancellor <natechancellor@gmail.com>
#     Fixes: df561f6688fe ("treewide: Use fallthrough pseudo-keyword")
#     Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
#     Reviewed-and-tested-by: Nathan Chancellor <natechancellor@gmail.com>
#     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/s390-linux/bin/s390-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/s390-linux/bin/s390-linux-ld --version
# < git log --format=%s --max-count=1 6a9dc5fd6170d0a41c8a14eb19e63d94bea5705a
# < make -s -j 24 ARCH=s390 O=/kisskb/build/linus_s390-allyesconfig_s390x-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/s390-linux/bin/s390-linux-  allyesconfig
# Added to kconfig CONFIG_BUILD_DOCSRC=n
# Added to kconfig CONFIG_MODULE_SIG=n
# < make -s -j 24 ARCH=s390 O=/kisskb/build/linus_s390-allyesconfig_s390x-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/s390-linux/bin/s390-linux-  help
# make -s -j 24 ARCH=s390 O=/kisskb/build/linus_s390-allyesconfig_s390x-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/s390-linux/bin/s390-linux-  olddefconfig
# make -s -j 24 ARCH=s390 O=/kisskb/build/linus_s390-allyesconfig_s390x-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/s390-linux/bin/s390-linux-  
/kisskb/src/drivers/gpu/drm/rockchip/cdn-dp-core.c:1124:12: warning: 'cdn_dp_resume' defined but not used [-Wunused-function]
 static int cdn_dp_resume(struct device *dev)
            ^~~~~~~~~~~~~
/kisskb/src/drivers/input/joystick/analog.c:160:2: warning: #warning Precise timer not defined for this architecture. [-Wcpp]
 #warning Precise timer not defined for this architecture.
  ^~~~~~~
/kisskb/src/drivers/staging/media/tegra-vde/vde.c:916:12: warning: 'tegra_vde_runtime_suspend' defined but not used [-Wunused-function]
 static int tegra_vde_runtime_suspend(struct device *dev)
            ^~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /kisskb/src/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c:41:
/kisskb/src/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c: In function 'mvpp2_setup_bm_pool':
/kisskb/src/drivers/net/ethernet/marvell/mvpp2/mvpp2.h:647:2: warning: overflow in conversion from 'long unsigned int' to 'int' changes value from '18446744073709551584' to '-32' [-Woverflow]
  ((total_size) - MVPP2_SKB_HEADROOM - MVPP2_SKB_SHINFO_SIZE)
  ^
/kisskb/src/drivers/net/ethernet/marvell/mvpp2/mvpp2.h:714:33: note: in expansion of macro 'MVPP2_RX_MAX_PKT_SIZE'
 #define MVPP2_BM_SHORT_PKT_SIZE MVPP2_RX_MAX_PKT_SIZE(MVPP2_BM_SHORT_FRAME_SIZE)
                                 ^~~~~~~~~~~~~~~~~~~~~
/kisskb/src/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c:652:41: note: in expansion of macro 'MVPP2_BM_SHORT_PKT_SIZE'
  mvpp2_pools[MVPP2_BM_SHORT].pkt_size = MVPP2_BM_SHORT_PKT_SIZE;
                                         ^~~~~~~~~~~~~~~~~~~~~~~
Completed OK
# rm -rf /kisskb/build/linus_s390-allyesconfig_s390x-gcc8
# Build took: 0:22:53.895321