# git rev-parse -q --verify 91288fcc5a7ebb6378f442916299dc20d037aa72^{commit}
91288fcc5a7ebb6378f442916299dc20d037aa72
already have revision, skipping fetch
# git checkout -q -f -B kisskb 91288fcc5a7ebb6378f442916299dc20d037aa72
# git clean -qxdf
# < git log -1
# commit 91288fcc5a7ebb6378f442916299dc20d037aa72
# Author: Oliver O'Halloran <oohall@gmail.com>
# Date:   Wed Oct 23 12:36:35 2019 +1100
# 
#     powerpc/boot: Fix the initrd being overwritten under qemu
#     
#     When booting under OF the zImage expects the initrd address and size
#     to be passed to it using registers r3 and r4. SLOF (guest firmware
#     used by QEMU) currently doesn't do this so the zImage is not aware of
#     the initrd location. This can result in initrd corruption either
#     though the zImage extracting the vmlinux over the initrd, or by the
#     vmlinux overwriting the initrd when relocating itself.
#     
#     QEMU does put the linux,initrd-start and linux,initrd-end properties
#     into the devicetree to vmlinux to find the initrd. So we can work
#     around the problem by also looking for those properties in the zImage.
#     
#     Cc: stable@vger.kernel.org
#     Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20191023013635.2512-1-oohall@gmail.com
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-gcc --version
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-ld --version
# < git log --format=%s --max-count=1 91288fcc5a7ebb6378f442916299dc20d037aa72
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_tqm8xx_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  tqm8xx_defconfig
# make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_tqm8xx_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  
/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:338:21: note: 'pdeo' was declared here
/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-next_tqm8xx_defconfig_powerpc-gcc4.6
# Build took: 0:00:39.971693