# git rev-parse -q --verify 66f93c5a02d5ba6ef17fef459143961382593212^{commit}
66f93c5a02d5ba6ef17fef459143961382593212
already have revision, skipping fetch
# git checkout -q -f -B kisskb 66f93c5a02d5ba6ef17fef459143961382593212
# git clean -qxdf
# < git log -1
# commit 66f93c5a02d5ba6ef17fef459143961382593212
# Author: Nicholas Piggin <npiggin@gmail.com>
# Date:   Thu Nov 15 12:34:27 2018 +1000
# 
#     powerpc/64: Fix kernel stack 16-byte alignment
#     
#     Commit 4c2de74cc869 ("powerpc/64: Interrupts save PPR on stack rather
#     than thread_struct") changed sizeof(struct pt_regs) % 16 from 0 to 8,
#     which causes the interrupt frame allocation on kernel entry to put the
#     kernel stack out of alignment.
#     
#     Quadword (16-byte) alignment for the stack is required by both the
#     64-bit v1 ABI (v1.9 § 3.2.2) and the 64-bit v2 ABI (v1.1 § 2.2.2.1).
#     
#     Add a pad field to fix alignment, and add a BUILD_BUG_ON to catch this
#     in future.
#     
#     Fixes: 4c2de74cc869 ("powerpc/64: Interrupts save PPR on stack rather than thread_struct")
#     Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-gcc --version
# < git log --format=%s --max-count=1 66f93c5a02d5ba6ef17fef459143961382593212
# < make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-fixes_mpc885_ads_defconfig+HUGETLB_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  mpc885_ads_defconfig
# Added to kconfig CONFIG_HUGETLBFS=y
# yes \n | make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-fixes_mpc885_ads_defconfig+HUGETLB_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  oldconfig
yes: standard output: Broken pipe
# make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-fixes_mpc885_ads_defconfig+HUGETLB_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  
/kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl':
/kisskb/src/kernel/printk/printk.c:186:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/fs/proc/inode.c: In function 'proc_reg_open':
/kisskb/src/include/linux/list.h:65:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/fs/proc/inode.c:341:21: note: 'pdeo' was declared here
/kisskb/src/mm/hugetlb.c: In function 'alloc_pool_huge_page':
/kisskb/src/mm/hugetlb.c:1433:5: warning: 'page' may be used uninitialized in this function [-Wuninitialized]
Image Name:   Linux-4.20.0-rc1-g66f93c5a02d5
Created:      Thu Nov 15 20:57:59 2018
Image Type:   PowerPC Linux Kernel Image (gzip compressed)
Data Size:    1826860 Bytes = 1784.04 KiB = 1.74 MiB
Load Address: 00400000
Entry Point:  004001e8
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_mpc885_ads_defconfig+HUGETLB_powerpc
# Build took: 0:00:20.410186