selftests/kexec: update searching for the Kconfig

First check /lib/modules/`uname -r`/config, before using the IKCONFIG.
In addition, the configs.ko might be compressed.  Fix the configs.ko
name.

Reviewed-by: Petr Vorel <pvorel@suse.cz>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>

tools/testing/selftests/kexec/kexec_common_lib.sh

@@ -138,15 +138,20 @@ kconfig_enabled()
 	return 0
 }
 
-# Attempt to get the kernel config first via proc, and then by
-# extracting it from the kernel image or the configs.ko using
-# scripts/extract-ikconfig.
+# Attempt to get the kernel config first by checking the modules directory
+# then via proc, and finally by extracting it from the kernel image or the
+# configs.ko using scripts/extract-ikconfig.
 # Return 1 for found.
 get_kconfig()
 {
 	local proc_config="/proc/config.gz"
 	local module_dir="/lib/modules/`uname -r`"
-	local configs_module="$module_dir/kernel/kernel/configs.ko"
+	local configs_module="$module_dir/kernel/kernel/configs.ko*"
+
+	if [ -f $module_dir/config ]; then
+		IKCONFIG=$module_dir/config
+		return 1
+	fi
 
 	if [ ! -f $proc_config ]; then
 		modprobe configs > /dev/null 2>&1