[PATCH] reserve space for swap label

[pandora-kernel.git] / include / linux / gfp.h

diff --git a/include/linux/gfp.h b/include/linux/gfp.h
index 313dfe9..cc9e608 100644 (file)
--- a/include/linux/gfp.h
+++ b/include/linux/gfp.h
@@ -4,14 +4,13 @@
 #include <linux/mmzone.h>
 #include <linux/stddef.h>
 #include <linux/linkage.h>
-#include <linux/config.h>
 
 struct vm_area_struct;
 
 /*
  * GFP bitmasks..
  */
-/* Zone modifiers in GFP_ZONEMASK (see linux/mmzone.h - low two bits) */
+/* Zone modifiers in GFP_ZONEMASK (see linux/mmzone.h - low three bits) */
 #define __GFP_DMA      ((__force gfp_t)0x01u)
 #define __GFP_HIGHMEM  ((__force gfp_t)0x02u)
 #ifdef CONFIG_DMA_IS_DMA32
@@ -57,6 +56,9 @@ struct vm_area_struct;
                        __GFP_NOFAIL|__GFP_NORETRY|__GFP_NO_GROW|__GFP_COMP| \
                        __GFP_NOMEMALLOC|__GFP_HARDWALL)
 
+/* This equals 0, but use constants in case they ever change */
+#define GFP_NOWAIT     (GFP_ATOMIC & ~__GFP_HIGH)
+/* GFP_ATOMIC means both !wait (__GFP_WAIT not set) and use emergency pool */
 #define GFP_ATOMIC     (__GFP_HIGH)
 #define GFP_NOIO       (__GFP_WAIT)
 #define GFP_NOFS       (__GFP_WAIT | __GFP_IO)
@@ -74,7 +76,12 @@ struct vm_area_struct;
 #define GFP_DMA32      __GFP_DMA32
 
 
-#define gfp_zone(mask) ((__force int)((mask) & (__force gfp_t)GFP_ZONEMASK))
+static inline int gfp_zone(gfp_t gfp)
+{
+       int zone = GFP_ZONEMASK & (__force int) gfp;
+       BUG_ON(zone >= GFP_ZONETYPES);
+       return zone;
+}
 
 /*
  * There is only one page-allocator function, and two main namespaces to
@@ -104,6 +111,10 @@ static inline struct page *alloc_pages_node(int nid, gfp_t gfp_mask,
        if (unlikely(order >= MAX_ORDER))
                return NULL;
 
+       /* Unknown node is current node */
+       if (nid < 0)
+               nid = numa_node_id();
+
        return __alloc_pages(gfp_mask, order,
                NODE_DATA(nid)->node_zonelists + gfp_zone(gfp_mask));
 }
@@ -147,9 +158,9 @@ extern void FASTCALL(free_cold_page(struct page *page));
 
 void page_alloc_init(void);
 #ifdef CONFIG_NUMA
-void drain_remote_pages(void);
+void drain_node_pages(int node);
 #else
-static inline void drain_remote_pages(void) { };
+static inline void drain_node_pages(int node) { };
 #endif
 
 #endif /* __LINUX_GFP_H */