# git rev-parse -q --verify 5b82a04d57b60f48dc7f73763941a6542ad1cf16^{commit}
5b82a04d57b60f48dc7f73763941a6542ad1cf16
already have revision, skipping fetch
# git checkout -q -f -B kisskb 5b82a04d57b60f48dc7f73763941a6542ad1cf16
# git clean -qxdf
# < git log -1
# commit 5b82a04d57b60f48dc7f73763941a6542ad1cf16
# Author: Christophe Leroy <christophe.leroy@c-s.fr>
# Date:   Thu Feb 6 13:50:29 2020 +0000
# 
#     powerpc/hugetlb: Fix 8M hugepages on 8xx
#     
#     Commit 55c8fc3f4930 ("powerpc/8xx: reintroduce 16K pages with HW
#     assistance") redefined pte_t as a struct of 4 pte_basic_t, because
#     in 16K pages mode there are four identical entries in the page table.
#     But hugepd entries for 8k pages require only one entrie of size
#     pte_basic_t. So there is no point in creating a cache for 4 entries
#     page tables.
#     
#     Also, with HW assistance the entries must be 4k aligned, the 8xx
#     drops the last 12 bits. Redefine HUGEPD_SHIFT_MASK to mask them out.
#     
#     Calculate PTE_T_ORDER using the size of pte_basic_t instead of pte_t.
#     
#     In 16k mode, define a specific set_huge_pte_at() function which writes
#     the pte in a single entry instead of using set_pte_at() which writes
#     4 identical entries. Define set_pte_filter() inline otherwise GCC
#     doesn't inline it anymore because it is now used twice, and that gives
#     a pretty suboptimal code because of pte_t being a struct of 4 entries.
#     This function is also used for 512k pages which only require one entry
#     as well allthough replicating it four times is harmless as 512k pages
#     entries are spread every 128 bytes in the table.
#     
#     Fixes: 22569b881d37 ("powerpc/8xx: Enable 8M hugepage support with HW assistance")
#     Cc: stable@vger.kernel.org # v5.0+
#     Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/e744db1529271d11a3fdcdf641617846907b6ffd.1580997012.git.christophe.leroy@c-s.fr
# < /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 5b82a04d57b60f48dc7f73763941a6542ad1cf16
# < make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-fixes_83xx_mpc834x_itxgp_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  83xx/mpc834x_itxgp_defconfig
# make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-fixes_83xx_mpc834x_itxgp_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
INFO: Uncompressed kernel (size 0x5a7704) overlaps the address of the wrapper(0x400000)
INFO: Fixing the link_address of wrapper to (0x600000)
INFO: Uncompressed kernel (size 0x5a7704) overlaps the address of the wrapper(0x400000)
INFO: Fixing the link_address of wrapper to (0x600000)
INFO: Uncompressed kernel (size 0x59701c) overlaps the address of the wrapper(0x400000)
INFO: Fixing the link_address of wrapper to (0x600000)
Image Name:   Linux-5.5.0-g5b82a04d57b6
Created:      Sun Feb  9 21:20:12 2020
Image Type:   PowerPC Linux Kernel Image (gzip compressed)
Data Size:    2866902 Bytes = 2799.71 KiB = 2.73 MiB
Load Address: 00000000
Entry Point:  00000000
Image Name:   Linux-5.5.0-g5b82a04d57b6
Created:      Sun Feb  9 21:20:12 2020
Image Type:   PowerPC Linux Kernel Image (gzip compressed)
Data Size:    2896211 Bytes = 2828.33 KiB = 2.76 MiB
Load Address: 00600000
Entry Point:  00600294
Image Name:   Linux-5.5.0-g5b82a04d57b6
Created:      Sun Feb  9 21:20:12 2020
Image Type:   PowerPC Linux Kernel Image (gzip compressed)
Data Size:    2895847 Bytes = 2827.98 KiB = 2.76 MiB
Load Address: 00600000
Entry Point:  00600294
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_83xx_mpc834x_itxgp_defconfig_powerpc-gcc5
# Build took: 0:00:50.320028