Update linux_checkout to use LINUX_SRC

Author: gsingh93

Makefile

@@ -184,7 +184,7 @@ linux_checkout:
 ifndef VERSION
 	$(error VERSION environment variable is not defined)
 endif
-	$(SCRIPT_DIR)/checkout_linux.sh $(VERSION)
+	$(SCRIPT_DIR)/checkout_linux.sh $(VERSION) $(LINUX_SRC)
 
 
 # These targets do the same thing as the `linux` targets, but because they're in

scripts/checkout_linux.sh

@@ -3,6 +3,7 @@
 set -o errexit
 
 VERSION="$1"
+LINUX_SRC="${2:-linux}"
 
 if [ -z "$VERSION" ]; then
     echo "usage: $0 VERSION"
@@ -11,8 +12,8 @@ fi
 
 function check_version_and_checkout {
     local REF="$1"
-    if git -C linux show-ref "$REF" > /dev/null; then
-        git -C linux checkout $REF
+    if git -C "$LINUX_SRC" show-ref "$REF" > /dev/null; then
+        git -C "$LINUX_SRC" checkout $REF
         return 0
     else
         return 1