Index: generic/include/mm/frame.h
===================================================================
--- generic/include/mm/frame.h	(revision 677a6d50fe04baf1fc4de579c24ea8dd8da3099b)
+++ generic/include/mm/frame.h	(revision 46d26ee596dd9907535ce84849eaef378cdeaf36)
@@ -39,6 +39,11 @@
 #define ONE_FRAME	0
 
-#define FRAME_KA	1	/* skip frames conflicting with user address space */
-#define FRAME_PANIC	2	/* panic on failure */
+#define FRAME_KA		1	/* skip frames conflicting with user address space */
+#define FRAME_PANIC		2	/* panic on failure */
+#define FRAME_NON_BLOCKING	4	/* do not panic and do not sleep on failure */
+
+#define FRAME_OK		0	/* frame_alloc return status */
+#define FRAME_NO_MEMORY		1	/* frame_alloc return status */
+#define FRAME_ERROR		2	/* frame_alloc return status */
 
 #define FRAME2ADDR(zone, frame)			((zone)->base + ((frame) - (zone)->frames) * FRAME_SIZE)
@@ -89,6 +94,8 @@
 extern void frame_init(void);
 extern void frame_initialize(frame_t *frame, zone_t *zone);
-__address frame_alloc(int flags, __u8 order);
+
+__address frame_alloc(int flags, __u8 order, int * status);
 extern void frame_free(__address addr);
+
 zone_t * get_zone_by_frame(frame_t * frame);