# 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/nds32le-linux/bin/nds32le-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/nds32le-linux/bin/nds32le-linux-ld --version
# < git log --format=%s --max-count=1 6a9dc5fd6170d0a41c8a14eb19e63d94bea5705a
# < make -s -j 10 ARCH=nds32 O=/kisskb/build/linus_nds32-allyesconfig_nds32le-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/nds32le-linux/bin/nds32le-linux-  allyesconfig
# < make -s -j 10 ARCH=nds32 O=/kisskb/build/linus_nds32-allyesconfig_nds32le-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/nds32le-linux/bin/nds32le-linux-  help
# make -s -j 10 ARCH=nds32 O=/kisskb/build/linus_nds32-allyesconfig_nds32le-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/nds32le-linux/bin/nds32le-linux-  olddefconfig
# make -s -j 10 ARCH=nds32 O=/kisskb/build/linus_nds32-allyesconfig_nds32le-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/nds32le-linux/bin/nds32le-linux-  
<stdin>:1511:2: warning: #warning syscall clone3 not implemented [-Wcpp]
/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.
  ^~~~~~~
In file included from /kisskb/src/include/linux/printk.h:405,
                 from /kisskb/src/include/linux/kernel.h:15,
                 from /kisskb/src/include/linux/clk.h:13,
                 from /kisskb/src/drivers/crypto/sa2ul.c:11:
/kisskb/src/drivers/crypto/sa2ul.c: In function 'sa_sha_init':
/kisskb/src/drivers/crypto/sa2ul.c:1486:33: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
   crypto_ahash_digestsize(tfm), (u64)rctx);
                                 ^
/kisskb/src/include/linux/dynamic_debug.h:125:15: note: in definition of macro '__dynamic_func_call'
   func(&id, ##__VA_ARGS__);  \
               ^~~~~~~~~~~
/kisskb/src/include/linux/dynamic_debug.h:157:2: note: in expansion of macro '_dynamic_func_call'
  _dynamic_func_call(fmt,__dynamic_dev_dbg,   \
  ^~~~~~~~~~~~~~~~~~
/kisskb/src/include/linux/dev_printk.h:115:2: note: in expansion of macro 'dynamic_dev_dbg'
  dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__)
  ^~~~~~~~~~~~~~~
/kisskb/src/drivers/crypto/sa2ul.c:1485:2: note: in expansion of macro 'dev_dbg'
  dev_dbg(sa_k3_dev, "init: digest size: %d, rctx=%llx\n",
  ^~~~~~~
WARNING: modpost: EXPORT symbol "copy_page" [vmlinux] version generation failed, symbol will not be versioned.
WARNING: modpost: EXPORT symbol "clear_page" [vmlinux] version generation failed, symbol will not be versioned.
Completed OK
# rm -rf /kisskb/build/linus_nds32-allyesconfig_nds32le-gcc8
# Build took: 0:26:52.881518