# git rev-parse -q --verify 59cc84c802eb923805e7bba425976a3df5ce35d8^{commit}
59cc84c802eb923805e7bba425976a3df5ce35d8
already have revision, skipping fetch
# git checkout -q -f -B kisskb 59cc84c802eb923805e7bba425976a3df5ce35d8
# git clean -qxdf
# < git log -1
# commit 59cc84c802eb923805e7bba425976a3df5ce35d8
# Author: Frederic Barrat <fbarrat@linux.ibm.com>
# Date:   Wed May 26 16:45:40 2021 +0200
# 
#     Revert "powerpc/kernel/iommu: Align size for IOMMU_PAGE_SIZE() to save TCEs"
#     
#     This reverts commit 3c0468d4451eb6b4f6604370639f163f9637a479.
#     
#     That commit was breaking alignment guarantees for the DMA address when
#     allocating coherent mappings, as described in
#     Documentation/core-api/dma-api-howto.rst
#     
#     It was also noticed by Mellanox' driver:
#     [ 1515.763621] mlx5_core c002:01:00.0: mlx5_frag_buf_alloc_node:146:(pid 13402): unexpected map alignment: 0x0800000000c61000, page_shift=16
#     [ 1515.763635] mlx5_core c002:01:00.0: mlx5_cqwq_create:181:(pid
#     13402): mlx5_frag_buf_alloc_node() failed, -12
#     
#     Fixes: 3c0468d4451e ("powerpc/kernel/iommu: Align size for  IOMMU_PAGE_SIZE() to save TCEs")
#     Signed-off-by: Frederic Barrat <fbarrat@linux.ibm.com>
#     Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20210526144540.117795-1-fbarrat@linux.ibm.com
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-ld --version
# < git log --format=%s --max-count=1 59cc84c802eb923805e7bba425976a3df5ce35d8
# < make -s -j 120 ARCH=x86 O=/kisskb/build/powerpc-fixes_x86_64_defconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  x86_64_defconfig
# < make -s -j 120 ARCH=x86 O=/kisskb/build/powerpc-fixes_x86_64_defconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  help
# make -s -j 120 ARCH=x86 O=/kisskb/build/powerpc-fixes_x86_64_defconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  olddefconfig
# make -s -j 120 ARCH=x86 O=/kisskb/build/powerpc-fixes_x86_64_defconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_x86_64_defconfig_x86_64-gcc8
# Build took: 0:01:27.048853