#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) */
-#define __GFP_DMA 0x01
-#define __GFP_HIGHMEM 0x02
+/* 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
+#define __GFP_DMA32 ((__force gfp_t)0x01) /* ZONE_DMA is ZONE_DMA32 */
+#elif BITS_PER_LONG < 64
+#define __GFP_DMA32 ((__force gfp_t)0x00) /* ZONE_NORMAL is ZONE_DMA32 */
+#else
+#define __GFP_DMA32 ((__force gfp_t)0x04) /* Has own ZONE_DMA32 */
+#endif
/*
* Action modifiers - doesn't change the zoning
*
* __GFP_NORETRY: The VM implementation must not retry indefinitely.
*/
-#define __GFP_WAIT 0x10 /* Can wait and reschedule? */
-#define __GFP_HIGH 0x20 /* Should access emergency pools? */
-#define __GFP_IO 0x40 /* Can start physical IO? */
-#define __GFP_FS 0x80 /* Can call down to low-level FS? */
-#define __GFP_COLD 0x100 /* Cache-cold page required */
-#define __GFP_NOWARN 0x200 /* Suppress page allocation failure warning */
-#define __GFP_REPEAT 0x400 /* Retry the allocation. Might fail */
-#define __GFP_NOFAIL 0x800 /* Retry for ever. Cannot fail */
-#define __GFP_NORETRY 0x1000 /* Do not retry. Might fail */
-#define __GFP_NO_GROW 0x2000 /* Slab internal usage */
-#define __GFP_COMP 0x4000 /* Add compound page metadata */
-
-#define __GFP_BITS_SHIFT 16 /* Room for 16 __GFP_FOO bits */
-#define __GFP_BITS_MASK ((1 << __GFP_BITS_SHIFT) - 1)
+#define __GFP_WAIT ((__force gfp_t)0x10u) /* Can wait and reschedule? */
+#define __GFP_HIGH ((__force gfp_t)0x20u) /* Should access emergency pools? */
+#define __GFP_IO ((__force gfp_t)0x40u) /* Can start physical IO? */
+#define __GFP_FS ((__force gfp_t)0x80u) /* Can call down to low-level FS? */
+#define __GFP_COLD ((__force gfp_t)0x100u) /* Cache-cold page required */
+#define __GFP_NOWARN ((__force gfp_t)0x200u) /* Suppress page allocation failure warning */
+#define __GFP_REPEAT ((__force gfp_t)0x400u) /* Retry the allocation. Might fail */
+#define __GFP_NOFAIL ((__force gfp_t)0x800u) /* Retry for ever. Cannot fail */
+#define __GFP_NORETRY ((__force gfp_t)0x1000u)/* Do not retry. Might fail */
+#define __GFP_NO_GROW ((__force gfp_t)0x2000u)/* Slab internal usage */
+#define __GFP_COMP ((__force gfp_t)0x4000u)/* Add compound page metadata */
+#define __GFP_ZERO ((__force gfp_t)0x8000u)/* Return zeroed page on success */
+#define __GFP_NOMEMALLOC ((__force gfp_t)0x10000u) /* Don't use emergency reserves */
+#define __GFP_HARDWALL ((__force gfp_t)0x20000u) /* Enforce hardwall cpuset memory allocs */
+
+#define __GFP_BITS_SHIFT 20 /* Room for 20 __GFP_FOO bits */
+#define __GFP_BITS_MASK ((__force gfp_t)((1 << __GFP_BITS_SHIFT) - 1))
/* if you forget to add the bitmask here kernel will crash, period */
#define GFP_LEVEL_MASK (__GFP_WAIT|__GFP_HIGH|__GFP_IO|__GFP_FS| \
__GFP_COLD|__GFP_NOWARN|__GFP_REPEAT| \
- __GFP_NOFAIL|__GFP_NORETRY|__GFP_NO_GROW|__GFP_COMP)
+ __GFP_NOFAIL|__GFP_NORETRY|__GFP_NO_GROW|__GFP_COMP| \
+ __GFP_NOMEMALLOC|__GFP_HARDWALL)
-#define GFP_ATOMIC (__GFP_HIGH)
+/* 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 | __GFP_NOWARN)
#define GFP_NOIO (__GFP_WAIT)
#define GFP_NOFS (__GFP_WAIT | __GFP_IO)
#define GFP_KERNEL (__GFP_WAIT | __GFP_IO | __GFP_FS)
-#define GFP_USER (__GFP_WAIT | __GFP_IO | __GFP_FS)
-#define GFP_HIGHUSER (__GFP_WAIT | __GFP_IO | __GFP_FS | __GFP_HIGHMEM)
+#define GFP_USER (__GFP_WAIT | __GFP_IO | __GFP_FS | __GFP_HARDWALL)
+#define GFP_HIGHUSER (__GFP_WAIT | __GFP_IO | __GFP_FS | __GFP_HARDWALL | \
+ __GFP_HIGHMEM)
/* Flag - indicates that the buffer will be suitable for DMA. Ignored on some
platforms, used as appropriate on others */
#define GFP_DMA __GFP_DMA
+/* 4GB DMA on some platforms */
+#define GFP_DMA32 __GFP_DMA32
+
+
+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
* For the normal case of non-DISCONTIGMEM systems the NODE_DATA() gets
* optimized to &contig_page_data at compile-time.
*/
-extern struct page * FASTCALL(__alloc_pages(unsigned int, unsigned int, struct zonelist *));
-static inline struct page * alloc_pages_node(int nid, unsigned int gfp_mask, unsigned int order)
+
+#ifndef HAVE_ARCH_FREE_PAGE
+/*
+ * If arch_free_page returns non-zero then the generic free_page code can
+ * immediately bail: the arch-specific function has done all the work.
+ */
+static inline int arch_free_page(struct page *page, int order) { return 0; }
+#endif
+
+extern struct page *
+FASTCALL(__alloc_pages(gfp_t, unsigned int, struct zonelist *));
+
+static inline struct page *alloc_pages_node(int nid, gfp_t gfp_mask,
+ unsigned int order)
{
if (unlikely(order >= MAX_ORDER))
return NULL;
- return __alloc_pages(gfp_mask, order, NODE_DATA(nid)->node_zonelists + (gfp_mask & GFP_ZONEMASK));
+ /* 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));
}
+#ifdef CONFIG_NUMA
+extern struct page *alloc_pages_current(gfp_t gfp_mask, unsigned order);
+
+static inline struct page *
+alloc_pages(gfp_t gfp_mask, unsigned int order)
+{
+ if (unlikely(order >= MAX_ORDER))
+ return NULL;
+
+ return alloc_pages_current(gfp_mask, order);
+}
+extern struct page *alloc_page_vma(gfp_t gfp_mask,
+ struct vm_area_struct *vma, unsigned long addr);
+#else
#define alloc_pages(gfp_mask, order) \
alloc_pages_node(numa_node_id(), gfp_mask, order)
-#define alloc_page(gfp_mask) \
- alloc_pages_node(numa_node_id(), gfp_mask, 0)
+#define alloc_page_vma(gfp_mask, vma, addr) alloc_pages(gfp_mask, 0)
+#endif
+#define alloc_page(gfp_mask) alloc_pages(gfp_mask, 0)
-extern unsigned long FASTCALL(__get_free_pages(unsigned int gfp_mask, unsigned int order));
-extern unsigned long FASTCALL(get_zeroed_page(unsigned int gfp_mask));
+extern unsigned long FASTCALL(__get_free_pages(gfp_t gfp_mask, unsigned int order));
+extern unsigned long FASTCALL(get_zeroed_page(gfp_t gfp_mask));
#define __get_free_page(gfp_mask) \
__get_free_pages((gfp_mask),0)
#define free_page(addr) free_pages((addr),0)
void page_alloc_init(void);
+#ifdef CONFIG_NUMA
+void drain_node_pages(int node);
+#else
+static inline void drain_node_pages(int node) { };
+#endif
#endif /* __LINUX_GFP_H */