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name : nsdeps
 #!/bin/sh
# SPDX-License-Identifier: GPL-2.0
# Linux kernel symbol namespace import generator
#
# This script requires a minimum spatch version.
SPATCH_REQ_VERSION="1.0.4"

DIR="$(dirname $(readlink -f $0))/.."
SPATCH="`which ${SPATCH:=spatch}`"
if [ ! -x "$SPATCH" ]; then
	echo 'spatch is part of the Coccinelle project and is available at http://coccinelle.lip6.fr/'
	exit 1
fi

SPATCH_VERSION=$($SPATCH --version | head -1 | awk '{print $3}')

if ! { echo "$SPATCH_REQ_VERSION"; echo "$SPATCH_VERSION"; } | sort -CV ; then
	echo "spatch needs to be version $SPATCH_REQ_VERSION or higher"
	exit 1
fi

if [ "$KBUILD_EXTMOD" ]; then
	src_prefix=
else
	src_prefix=$srctree/
fi

generate_deps_for_ns() {
	$SPATCH --very-quiet --in-place --sp-file \
		$srctree/scripts/coccinelle/misc/add_namespace.cocci -D nsdeps -D ns=$1 $2
}

generate_deps() {
	local mod=${1%.ko:}
	shift
	local namespaces="$*"
	local mod_source_files=$(sed "s|^\(.*\)\.o$|${src_prefix}\1.c|" $mod.mod)

	for ns in $namespaces; do
		echo "Adding namespace $ns to module $mod.ko."
		generate_deps_for_ns $ns "$mod_source_files"
		# sort the imports
		for source_file in $mod_source_files; do
			sed '/MODULE_IMPORT_NS/Q' $source_file > ${source_file}.tmp
			offset=$(wc -l ${source_file}.tmp | awk '{print $1;}')
			cat $source_file | grep MODULE_IMPORT_NS | LC_ALL=C sort -u >> ${source_file}.tmp
			tail -n +$((offset +1)) ${source_file} | grep -v MODULE_IMPORT_NS >> ${source_file}.tmp
			if ! diff -q ${source_file} ${source_file}.tmp; then
				mv ${source_file}.tmp ${source_file}
			else
				rm ${source_file}.tmp
			fi
		done
	done
}

while read line
do
	generate_deps $line
done < $MODULES_NSDEPS
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