Index: uspace/lib/c/include/as.h
===================================================================
--- uspace/lib/c/include/as.h	(revision 8b1e15ac9100f7b9da56e372d2f441ba44db6fcc)
+++ uspace/lib/c/include/as.h	(revision b927375984efc8c979a7d300d84c79a370dbd54d)
@@ -41,4 +41,17 @@
 #include <libarch/config.h>
 
+static inline size_t SIZE2PAGES(size_t size)
+{
+	if (size == 0)
+		return 0;
+	
+	return (size_t) ((size - 1) >> PAGE_WIDTH) + 1;
+}
+
+static inline size_t PAGES2SIZE(size_t pages)
+{
+	return (size_t) (pages << PAGE_WIDTH);
+}
+
 extern void *as_area_create(void *address, size_t size, int flags);
 extern int as_area_resize(void *address, size_t size, int flags);
Index: uspace/lib/c/include/malloc.h
===================================================================
--- uspace/lib/c/include/malloc.h	(revision 8b1e15ac9100f7b9da56e372d2f441ba44db6fcc)
+++ uspace/lib/c/include/malloc.h	(revision b927375984efc8c979a7d300d84c79a370dbd54d)
@@ -38,6 +38,4 @@
 #include <sys/types.h>
 
-extern uintptr_t get_max_heap_addr(void);
-
 extern void *malloc(const size_t size)
     __attribute__((malloc));
Index: uspace/lib/c/include/unistd.h
===================================================================
--- uspace/lib/c/include/unistd.h	(revision 8b1e15ac9100f7b9da56e372d2f441ba44db6fcc)
+++ uspace/lib/c/include/unistd.h	(revision b927375984efc8c979a7d300d84c79a370dbd54d)
@@ -44,6 +44,4 @@
 #endif
 
-#define getpagesize()  (PAGE_SIZE)
-
 #ifndef SEEK_SET
 	#define SEEK_SET  0
@@ -57,4 +55,6 @@
 	#define SEEK_END  2
 #endif
+
+#define getpagesize()  (PAGE_SIZE)
 
 extern int dup2(int oldfd, int newfd);