# git rev-parse -q --verify abd19d9b221d5f22c0f53ca3bc7366d824e7462f^{commit}
abd19d9b221d5f22c0f53ca3bc7366d824e7462f
already have revision, skipping fetch
# git checkout -q -f -B kisskb abd19d9b221d5f22c0f53ca3bc7366d824e7462f
# git clean -qxdf
# < git log -1
# commit abd19d9b221d5f22c0f53ca3bc7366d824e7462f
# Author: Alexey Kardashevskiy <aik@ozlabs.ru>
# Date:   Tue Sep 11 15:38:05 2018 +1000
# 
#     powerpc/powernv/ioda2: Reduce upper limit for DMA window size (retry)
#     
#     We use PHB in mode1 which uses bit 59 to select a correct DMA window.
#     However there is mode2 which uses bits 59:55 and allows up to 32 DMA
#     windows per a PE.
#     
#     Even though documentation does not clearly specify that, it seems that
#     the actual hardware does not support bits 59:55 even in mode1, in other
#     words we can create a window as big as 1<<58 but DMA simply won't work.
#     
#     This reduces the upper limit from 59 to 55 bits to let the userspace know
#     about the hardware limits.
#     
#     Fixes: ce57c6610cc2 "Merge branch 'topic/ppc-kvm' into next"
#     Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < git log --format=%s --max-count=1 abd19d9b221d5f22c0f53ca3bc7366d824e7462f
# < 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-  
/kisskb/src/arch/powerpc/kernel/head_40x.S: Assembler messages:
/kisskb/src/arch/powerpc/kernel/head_40x.S:883: Warning: invalid register expression
INFO: Uncompressed kernel (size 0x4a3c8c) overlaps the address of the wrapper(0x400000)
INFO: Fixing the link_address of wrapper to (0x500000)
Image Name:   Linux-4.19.0-rc3-gabd19d9b221d
Created:      Thu Sep 20 01:27:40 2018
Image Type:   PowerPC Linux Multi-File Image (gzip compressed)
Data Size:    2380358 Bytes = 2324.57 KiB = 2.27 MiB
Load Address: 00000000
Entry Point:  00000000
Contents:
   Image 0: 2373472 Bytes = 2317.84 KiB = 2.26 MiB
   Image 1: 3 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: 0:00:34.017184