# git rev-parse -q --verify 0823c68b054bca9dc321adea829af5cf36afb30b^{commit}
# git fetch -q -n -f git://gitlab.ozlabs.ibm.com/linuxppc/linux.git next-test
# git rev-parse -q --verify 0823c68b054bca9dc321adea829af5cf36afb30b^{commit}
0823c68b054bca9dc321adea829af5cf36afb30b
# git checkout -q -f -B kisskb 0823c68b054bca9dc321adea829af5cf36afb30b
# git clean -qxdf
# < git log -1
# commit 0823c68b054bca9dc321adea829af5cf36afb30b
# Author: Hari Bathini <hbathini@linux.ibm.com>
# Date:   Fri Sep 14 19:36:02 2018 +0530
# 
#     powerpc/fadump: re-register firmware-assisted dump if already registered
#     
#     Firmware-Assisted Dump (FADump) needs to be registered again after any
#     memory hot add/remove operation to update the crash memory ranges. But
#     currently, the kernel returns '-EEXIST' if we try to register without
#     uregistering it first. This could expose the system to racing issues
#     while unregistering and registering FADump from userspace during udev
#     events. Spare the userspace of this and let it be taken care of in the
#     kernel space for a simpler interface.
#     
#     Since this change, running 'echo 1 > /sys/kernel/fadump_registered'
#     would result in re-regisering (unregistering and registering) FADump,
#     if it was already registered.
#     
#     Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
#     Acked-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/s390x-linux/bin/s390x-linux-gcc --version
# < git log --format=%s --max-count=1 0823c68b054bca9dc321adea829af5cf36afb30b
# < make -s -j 120 ARCH=s390 O=/kisskb/build/powerpc-next_s390-defconfig_s390x CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/s390x-linux/bin/s390x-linux-  defconfig
# make -s -j 120 ARCH=s390 O=/kisskb/build/powerpc-next_s390-defconfig_s390x CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/s390x-linux/bin/s390x-linux-  
/kisskb/src/kernel/cgroup/cgroup-v1.c: In function 'cgroup1_mount':
/kisskb/src/kernel/cgroup/cgroup-v1.c:1256:20: warning: 'root' 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:185:16: 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]
/kisskb/src/drivers/net/tun.c: In function 'tun_get_user':
/kisskb/src/drivers/net/tun.c:1836:30: warning: 'copylen' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/net/tun.c:1746:46: warning: 'linear' may be used uninitialized in this function [-Wuninitialized]
Completed OK
# rm -rf /kisskb/build/powerpc-next_s390-defconfig_s390x
# Build took: 0:01:31.414138