Refactor page_type to rename PAGE_FILE to PAGE_EXECUTABLE as mmap and executables are now separate

src/userprog/exception.c

@@ -289,7 +289,7 @@ fetch_page (void *upage, bool write)
   bool success = false;
   switch (page->type) {
     case PAGE_MMAP:
-    case PAGE_FILE:
+    case PAGE_EXECUTABLE:
     case PAGE_SHARED:
       success = page_load_file (page);
       break;

src/userprog/process.c

@@ -715,7 +715,7 @@ load_segment (struct file *file, off_t ofs, uint8_t *upage,
 
       /* Add the page metadata to the SPT to be lazy loaded later on */
       if (page_insert_file (file, ofs, upage, page_read_bytes, page_zero_bytes,
-                            writable, PAGE_FILE) == NULL)
+                            writable, PAGE_EXECUTABLE) == NULL)
         return false;
 
       /* Advance. */

src/vm/page.h

@@ -7,7 +7,7 @@
 
 enum page_type
 {
-  PAGE_FILE,
+  PAGE_EXECUTABLE,
   PAGE_MMAP,
   PAGE_SHARED
 };