File kdump-bind-mount-sysroot.patch of Package kdump

From: Petr Tesarik <ptesarik@suse.com>
Subject: Convert sysroot to a bind mount in kdump initrd
References: bsc#976864
Patch-mainline: not yet

In SLES 12 SP2, systemd-fstab-generator no longer ignores non-device
root mounts, so it tries to run an actual mount command for root=kdump.
This fails, of course, because "kdump" is not mountable.

To solve this, pass "rootflags=bind" to the panic kernel, so systemd
can create a (bogus) bind mount and be happy.

See also kdump-root-parameter.patch.

Signed-off-by: Petr Tesarik <ptesarik@suse.com>
---
 init/load.sh         |    2 +-
 init/module-setup.sh |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

--- a/init/load.sh
+++ b/init/load.sh
@@ -71,7 +71,7 @@ function build_kdump_commandline()
         # Use deadline for saving the memory footprint
         commandline="$commandline elevator=deadline sysrq=yes reset_devices acpi_no_memhotplug cgroup_disable=memory"
         commandline="$commandline irqpoll ${nr_cpus}=${KDUMP_CPUS:-1}"
-        commandline="$commandline root=kdump rd.udev.children-max=8"
+        commandline="$commandline root=kdump rootflags=bind rd.udev.children-max=8"
         case $(uname -i) in
         i?86|x86_64)
             local boot_apicid=$(
--- a/init/module-setup.sh
+++ b/init/module-setup.sh
@@ -126,7 +126,7 @@ kdump_gen_mount_units() {
 	echo "${line[@]}" >> "$fstab"
     done
 
-    echo "root=kdump" > "$initdir/proc/cmdline"
+    echo > "$initdir/proc/cmdline"
     inst_binary -l \
 	"$systemdutildir/system-generators/systemd-fstab-generator" \
 	"/tmp/systemd-fstab-generator"