s390/mm: rename addressing_mode to s390_user_mode

Renaming the globally visible variable "user_mode" to "addressing_mode" in
order to fix a name clash was not a good idea. (Commit 37fe1d73 "s390/mm:
rename user_mode variable to addressing_mode")
Looking at the code after a couple of weeks one thinks: addressing mode of
what?
So rename the variable again. This time to s390_user_mode. Which hopefully
makes more sense.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 39d609b..555f985 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -302,8 +302,8 @@
 }
 early_param("vmalloc", parse_vmalloc);
 
-unsigned int addressing_mode = PRIMARY_SPACE_MODE;
-EXPORT_SYMBOL_GPL(addressing_mode);
+unsigned int s390_user_mode = PRIMARY_SPACE_MODE;
+EXPORT_SYMBOL_GPL(s390_user_mode);
 
 static int set_amode_primary(void)
 {
@@ -326,9 +326,9 @@
 static int __init early_parse_user_mode(char *p)
 {
 	if (p && strcmp(p, "primary") == 0)
-		addressing_mode = PRIMARY_SPACE_MODE;
+		s390_user_mode = PRIMARY_SPACE_MODE;
 	else if (!p || strcmp(p, "home") == 0)
-		addressing_mode = HOME_SPACE_MODE;
+		s390_user_mode = HOME_SPACE_MODE;
 	else
 		return 1;
 	return 0;
@@ -337,7 +337,7 @@
 
 static void setup_addressing_mode(void)
 {
-	if (addressing_mode == PRIMARY_SPACE_MODE) {
+	if (s390_user_mode == PRIMARY_SPACE_MODE) {
 		if (set_amode_primary())
 			pr_info("Address spaces switched, "
 				"mvcos available\n");