Rework x86_64 paging and vmm

kernel/util/util.h

@@ -35,6 +35,18 @@
     } \
   } while(0)
 
+#define LL_FINDPROP(head, out, propname, propvalue) \
+  do { \
+    typeof((head)) __tmp = (head); \
+    while (__tmp) { \
+      if (__tmp->propname == (propvalue)) { \
+        (out) = __tmp; \
+        break; \
+      } \
+      __tmp = __tmp->next; \
+    } \
+  } while(0)
+
 char *util_get_filename(char *path);
 
 #endif // UTIL_UTIL_H_