# 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-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 59cc84c802eb923805e7bba425976a3df5ce35d8
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_40x_obs600_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  40x/obs600_defconfig
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_40x_obs600_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  help
# make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_40x_obs600_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  olddefconfig
# make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_40x_obs600_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
INFO: Uncompressed kernel (size 0x56ef7c) overlaps the address of the wrapper(0x400000)
INFO: Fixing the link_address of wrapper to (0x600000)
Image Name:   Linux-5.13.0-rc2-g59cc84c802eb
Created:      Sun Jun  6 22:26:32 2021
Image Type:   PowerPC Linux Multi-File Image (gzip compressed)
Data Size:    2757854 Bytes = 2693.22 KiB = 2.63 MiB
Load Address: 00000000
Entry Point:  00000000
Contents:
   Image 0: 2750967 Bytes = 2686.49 KiB = 2.62 MiB
   Image 1: 2 Bytes = 0.00 KiB = 0.00 MiB
   Image 2: 6866 Bytes = 6.71 KiB = 0.01 MiB
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_40x_obs600_defconfig_powerpc-gcc5
# Build took: 0:00:42.972872