# git rev-parse -q --verify c8cfcb78c65877313cda7bcbace624d3dbd1f3b3^{commit}
c8cfcb78c65877313cda7bcbace624d3dbd1f3b3
already have revision, skipping fetch
# git checkout -q -f -B kisskb c8cfcb78c65877313cda7bcbace624d3dbd1f3b3
# git clean -qxdf
# < git log -1
# commit c8cfcb78c65877313cda7bcbace624d3dbd1f3b3
# Author: Jason A. Donenfeld <Jason@zx2c4.com>
# Date:   Wed Mar 18 20:27:32 2020 -0600
# 
#     crypto: arm64/chacha - correctly walk through blocks
#     
#     Prior, passing in chunks of 2, 3, or 4, followed by any additional
#     chunks would result in the chacha state counter getting out of sync,
#     resulting in incorrect encryption/decryption, which is a pretty nasty
#     crypto vuln: "why do images look weird on webpages?" WireGuard users
#     never experienced this prior, because we have always, out of tree, used
#     a different crypto library, until the recent Frankenzinc addition. This
#     commit fixes the issue by advancing the pointers and state counter by
#     the actual size processed. It also fixes up a bug in the (optional,
#     costly) stride test that prevented it from running on arm64.
#     
#     Fixes: b3aad5bad26a ("crypto: arm64/chacha - expose arm64 ChaCha routine as library function")
#     Reported-and-tested-by: Emil Renner Berthing <kernel@esmil.dk>
#     Cc: Ard Biesheuvel <ardb@kernel.org>
#     Cc: stable@vger.kernel.org # v5.5+
#     Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
#     Reviewed-by: Eric Biggers <ebiggers@google.com>
#     Signed-off-by: Herbert Xu <herbert@gondor.apana.org.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 c8cfcb78c65877313cda7bcbace624d3dbd1f3b3
# < make -s -j 32 ARCH=powerpc O=/kisskb/build/crypto_powernv_defconfig+NO_PERF_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  powernv_defconfig
# Added to kconfig CONFIG_PERF_EVENTS=n
# < make -s -j 32 ARCH=powerpc O=/kisskb/build/crypto_powernv_defconfig+NO_PERF_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  help
# make -s -j 32 ARCH=powerpc O=/kisskb/build/crypto_powernv_defconfig+NO_PERF_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  olddefconfig
# make -s -j 32 ARCH=powerpc O=/kisskb/build/crypto_powernv_defconfig+NO_PERF_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
WARNING: vmlinux.o(.text+0x2fc8): Section mismatch in reference from the variable start_here_common to the function .init.text:start_kernel()
The function start_here_common() references
the function __init start_kernel().
This is often because start_here_common lacks a __init 
annotation or the annotation of start_kernel is wrong.

Completed OK
# rm -rf /kisskb/build/crypto_powernv_defconfig+NO_PERF_powerpc-gcc5
# Build took: 0:03:20.208631