# git rev-parse -q --verify 5b82a04d57b60f48dc7f73763941a6542ad1cf16^{commit}
# git fetch -q -n -f git://gitlab.ozlabs.ibm.com/linuxppc/linux.git fixes-test
warning: The last gc run reported the following. Please correct the root cause
and remove .git/gc.log.
Automatic cleanup will not be performed until the file is removed.

warning: There are too many unreachable loose objects; run 'git prune' to remove them.

# git rev-parse -q --verify 5b82a04d57b60f48dc7f73763941a6542ad1cf16^{commit}
5b82a04d57b60f48dc7f73763941a6542ad1cf16
# 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/gcc-4.6.3-nolibc/x86_64-linux/bin/x86_64-linux-gcc --version
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/x86_64-linux/bin/x86_64-linux-ld --version
# < git log --format=%s --max-count=1 5b82a04d57b60f48dc7f73763941a6542ad1cf16
# < make -s -j 32 ARCH=x86_64 O=/kisskb/build/powerpc-fixes_x86_64-allnoconfig_x86_64-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/x86_64-linux/bin/x86_64-linux-  allnoconfig
# make -s -j 32 ARCH=x86_64 O=/kisskb/build/powerpc-fixes_x86_64-allnoconfig_x86_64-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/x86_64-linux/bin/x86_64-linux-  
/kisskb/src/arch/x86/kernel/apic/io_apic.c: In function 'mp_map_pin_to_irq':
/kisskb/src/arch/x86/kernel/apic/io_apic.c:1037:6: warning: 'irq' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/arch/x86/kernel/e820.c: In function 'e820__setup_pci_gap':
/kisskb/src/arch/x86/kernel/e820.c:665:16: warning: 'gapstart' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl':
/kisskb/src/kernel/printk/printk.c:204:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized]
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_x86_64-allnoconfig_x86_64-gcc4.6
# Build took: 0:00:47.329056