torture: Allow #CHECK# in --kconfig argument to kvm.sh

Testing building of a given RCU Tasks flavor with the other two
flavors disabled requires checking that the other two flavors are in
fact disabled.  This commit therefore modifies the scripting to permit
things like "#CHECK#CONFIG_TASKS_TRACE_RCU=n" to be passed into the
kvm.sh script's --kconfig parameter.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

tools/testing/selftests/rcutorture/bin/configcheck.sh

@@ -3,6 +3,8 @@
 #
 # Usage: configcheck.sh .config .config-template
 #
+# Non-empty output if errors detected.
+#
 # Copyright (C) IBM Corporation, 2011
 #
 # Authors: Paul E. McKenney <paulmck@linux.ibm.com>
@@ -10,32 +12,35 @@
 T="`mktemp -d ${TMPDIR-/tmp}/configcheck.sh.XXXXXX`"
 trap 'rm -rf $T' 0
 
-sed -e 's/"//g' < $1 > $T/.config
+# function test_kconfig_enabled ( Kconfig-var=val )
+function test_kconfig_enabled () {
+	if ! grep -q "^$1$" $T/.config
+	then
+		echo :$1: improperly set
+		return 1
+	fi
+	return 0
+}
 
-sed -e 's/"//g' -e 's/\(.*\)=n/# \1 is not set/' -e 's/^#CHECK#//' < $2 |
-awk	'
-{
-		print "if grep -q \"" $0 "\" < '"$T/.config"'";
-		print "then";
-		print "\t:";
-		print "else";
-		if ($1 == "#") {
-			print "\tif grep -q \"" $2 "\" < '"$T/.config"'";
-			print "\tthen";
-			print "\t\tif test \"$firsttime\" = \"\""
-			print "\t\tthen"
-			print "\t\t\tfirsttime=1"
-			print "\t\tfi"
-			print "\t\techo \":" $2 ": improperly set\"";
-			print "\telse";
-			print "\t\t:";
-			print "\tfi";
-		} else {
-			print "\tif test \"$firsttime\" = \"\""
-			print "\tthen"
-			print "\t\tfirsttime=1"
-			print "\tfi"
-			print "\techo \":" $0 ": improperly set\"";
-		}
-		print "fi";
-	}' | sh
+# function test_kconfig_disabled ( Kconfig-var )
+function test_kconfig_disabled () {
+	if grep -q "^$1=n$" $T/.config
+	then
+		return 0
+	fi
+	if grep -q "^$1=" $T/.config
+	then
+		echo :$1=n: improperly set
+		return 1
+	fi
+	return 0
+}
+
+sed -e 's/"//g' < $1 > $T/.config
+sed -e 's/^#CHECK#//' < $2 > $T/ConfigFragment
+grep '^CONFIG_.*=n$' $T/ConfigFragment |
+	sed -e 's/^/test_kconfig_disabled /' -e 's/=n$//' > $T/kconfig-n.sh
+. $T/kconfig-n.sh
+grep -v '^CONFIG_.*=n$' $T/ConfigFragment | grep '^CONFIG_' |
+	sed -e 's/^/test_kconfig_enabled /' > $T/kconfig-not-n.sh
+. $T/kconfig-not-n.sh

tools/testing/selftests/rcutorture/bin/kvm-test-1-run.sh

@@ -57,7 +57,6 @@ config_override_param () {
 		cat $T/Kconfig_args >> $resdir/ConfigFragment.input
 		config_override.sh $T/$2 $T/Kconfig_args > $T/$2.tmp
 		mv $T/$2.tmp $T/$2
-		# Note that "#CHECK#" is not permitted on commandline.
 	fi
 }
 

tools/testing/selftests/rcutorture/bin/kvm.sh

@@ -186,7 +186,7 @@ do
 		fi
 		;;
 	--kconfig|--kconfigs)
-		checkarg --kconfig "(Kconfig options)" $# "$2" '^CONFIG_[A-Z0-9_]\+=\([ynm]\|[0-9]\+\|"[^"]*"\)\( CONFIG_[A-Z0-9_]\+=\([ynm]\|[0-9]\+\|"[^"]*"\)\)*$' '^error$'
+		checkarg --kconfig "(Kconfig options)" $# "$2" '^\(#CHECK#\)\?CONFIG_[A-Z0-9_]\+=\([ynm]\|[0-9]\+\|"[^"]*"\)\( \(#CHECK#\)\?CONFIG_[A-Z0-9_]\+=\([ynm]\|[0-9]\+\|"[^"]*"\)\)*$' '^error$'
 		TORTURE_KCONFIG_ARG="`echo "$TORTURE_KCONFIG_ARG $2" | sed -e 's/^ *//' -e 's/ *$//'`"
 		shift
 		;;