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name : kvm-build.sh
 #!/bin/bash
# SPDX-License-Identifier: GPL-2.0+
#
# Build a kvm-ready Linux kernel from the tree in the current directory.
#
# Usage: kvm-build.sh config-template resdir
#
# Copyright (C) IBM Corporation, 2011
#
# Authors: Paul E. McKenney <paulmck@linux.ibm.com>

if test -f "$TORTURE_STOPFILE"
then
	echo "kvm-build.sh early exit due to run STOP request"
	exit 1
fi

config_template=${1}
if test -z "$config_template" -o ! -f "$config_template" -o ! -r "$config_template"
then
	echo "kvm-build.sh :$config_template: Not a readable file"
	exit 1
fi
resdir=${2}

T="`mktemp -d ${TMPDIR-/tmp}/kvm-build.sh.XXXXXX`"
trap 'rm -rf $T' 0

cp ${config_template} $T/config
cat << ___EOF___ >> $T/config
CONFIG_INITRAMFS_SOURCE="$TORTURE_INITRD"
CONFIG_VIRTIO_PCI=y
CONFIG_VIRTIO_CONSOLE=y
___EOF___

configinit.sh $T/config $resdir
retval=$?
if test $retval -gt 1
then
	exit 2
fi

# Tell "make" to use double the number of real CPUs on the build system.
ncpus="`getconf _NPROCESSORS_ONLN`"
make -j$((2 * ncpus)) $TORTURE_KMAKE_ARG > $resdir/Make.out 2>&1
retval=$?
if test $retval -ne 0 || grep "rcu[^/]*": < $resdir/Make.out | grep -E -q "Stop|Error|error:|warning:" || grep -E -q "Stop|Error|error:" < $resdir/Make.out
then
	echo Kernel build error
	grep -E "Stop|Error|error:|warning:" < $resdir/Make.out
	echo Run aborted.
	exit 3
fi
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