# git rev-parse -q --verify d78d5dace5398b542fd5a21b50db6e88ce7d392e^{commit}
d78d5dace5398b542fd5a21b50db6e88ce7d392e
already have revision, skipping fetch
# git checkout -q -f -B kisskb d78d5dace5398b542fd5a21b50db6e88ce7d392e
# git clean -qxdf
# < git log -1
# commit d78d5dace5398b542fd5a21b50db6e88ce7d392e
# Author: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
# Date:   Thu Oct 24 15:05:42 2019 +0530
# 
#     powerpc/book3s64/hash: Use secondary hash for bolted mapping if the primary is full
#     
#     With bolted hash page table entry, kernel currently only use primary hash group
#     when inserting the hash page table entry. In the rare case where kernel find all the
#     8 primary hash slot occupied by bolted entries, this can result in hash page
#     table insert failure for bolted entries. Avoid this by using the secondary hash
#     group.
#     
#     This is different from what kernel does for the non-bolted mapping. With
#     non-bolted entries kernel will try secondary before removing an existing entry
#     from hash page table group. With bolted prefer primary hash group and hence
#     try to insert the page table entry by removing a slot from primary before trying
#     the secondary hash group.
#     
#     Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20191024093542.29777-3-aneesh.kumar@linux.ibm.com
# < /opt/cross/kisskb/br-microblaze-full-2016.08-613-ge98b4dd/bin/microblazeel-linux-gcc --version
# < /opt/cross/kisskb/br-microblaze-full-2016.08-613-ge98b4dd/bin/microblazeel-linux-ld --version
# < git log --format=%s --max-count=1 d78d5dace5398b542fd5a21b50db6e88ce7d392e
# < make -s -j 32 ARCH=microblaze O=/kisskb/build/powerpc-next_mmu_defconfig_microblaze CROSS_COMPILE=/opt/cross/kisskb/br-microblaze-full-2016.08-613-ge98b4dd/bin/microblazeel-linux-  mmu_defconfig
# make -s -j 32 ARCH=microblaze O=/kisskb/build/powerpc-next_mmu_defconfig_microblaze CROSS_COMPILE=/opt/cross/kisskb/br-microblaze-full-2016.08-613-ge98b4dd/bin/microblazeel-linux-  
Kernel: arch/microblaze/boot/linux.bin is ready  (#1)
Completed OK
# rm -rf /kisskb/build/powerpc-next_mmu_defconfig_microblaze
# Build took: 0:00:53.767937