Merge x86-64 update from Andi

include/linux/bitops.h

@@ -84,6 +84,16 @@ static __inline__ int get_bitmask_order(unsigned int count)
 	return order;	/* We could be slightly more clever with -1 here... */
 }
 
+static __inline__ int get_count_order(unsigned int count)
+{
+	int order;
+	
+	order = fls(count) - 1;
+	if (count & (count - 1))
+		order++;
+	return order;
+}
+
 /*
  * hweightN: returns the hamming weight (i.e. the number
  * of bits set) of a N-bit word

include/linux/gfp.h

@@ -14,6 +14,13 @@ struct vm_area_struct;
 /* Zone modifiers in GFP_ZONEMASK (see linux/mmzone.h - low two 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
@@ -63,6 +70,10 @@ struct vm_area_struct;
 
 #define GFP_DMA		__GFP_DMA
 
+/* 4GB DMA on some platforms */
+#define GFP_DMA32	__GFP_DMA32
+
+
 #define gfp_zone(mask) ((__force int)((mask) & (__force gfp_t)GFP_ZONEMASK))
 
 /*

include/linux/mm.h

@@ -206,12 +206,6 @@ struct vm_operations_struct {
 struct mmu_gather;
 struct inode;
 
-#ifdef ARCH_HAS_ATOMIC_UNSIGNED
-typedef unsigned page_flags_t;
-#else
-typedef unsigned long page_flags_t;
-#endif
-
 /*
  * Each physical page in the system has a struct page associated with
  * it to keep track of whatever it is we are using the page for at the
@@ -219,7 +213,7 @@ typedef unsigned long page_flags_t;
  * a page.
  */
 struct page {
-	page_flags_t flags;		/* Atomic flags, some possibly
+	unsigned long flags;		/* Atomic flags, some possibly
 					 * updated asynchronously */
 	atomic_t _count;		/* Usage count, see below. */
 	atomic_t _mapcount;		/* Count of ptes mapped in mms,
@@ -435,7 +429,7 @@ static inline void put_page(struct page *page)
 #endif
 
 /* Page flags: | [SECTION] | [NODE] | ZONE | ... | FLAGS | */
-#define SECTIONS_PGOFF		((sizeof(page_flags_t)*8) - SECTIONS_WIDTH)
+#define SECTIONS_PGOFF		((sizeof(unsigned long)*8) - SECTIONS_WIDTH)
 #define NODES_PGOFF		(SECTIONS_PGOFF - NODES_WIDTH)
 #define ZONES_PGOFF		(NODES_PGOFF - ZONES_WIDTH)
 

include/linux/mmzone.h

@@ -71,10 +71,11 @@ struct per_cpu_pageset {
 #endif
 
 #define ZONE_DMA		0
-#define ZONE_NORMAL		1
-#define ZONE_HIGHMEM		2
+#define ZONE_DMA32		1
+#define ZONE_NORMAL		2
+#define ZONE_HIGHMEM		3
 
-#define MAX_NR_ZONES		3	/* Sync this with ZONES_SHIFT */
+#define MAX_NR_ZONES		4	/* Sync this with ZONES_SHIFT */
 #define ZONES_SHIFT		2	/* ceil(log2(MAX_NR_ZONES)) */
 
 
@@ -108,9 +109,10 @@ struct per_cpu_pageset {
 
 /*
  * On machines where it is needed (eg PCs) we divide physical memory
- * into multiple physical zones. On a PC we have 3 zones:
+ * into multiple physical zones. On a PC we have 4 zones:
  *
  * ZONE_DMA	  < 16 MB	ISA DMA capable memory
+ * ZONE_DMA32	     0 MB 	Empty
  * ZONE_NORMAL	16-896 MB	direct mapped by the kernel
  * ZONE_HIGHMEM	 > 896 MB	only page cache and user processes
  */
@@ -433,7 +435,9 @@ int lowmem_reserve_ratio_sysctl_handler(struct ctl_table *, int, struct file *,
 
 #include <linux/topology.h>
 /* Returns the number of the current Node. */
+#ifndef numa_node_id
 #define numa_node_id()		(cpu_to_node(raw_smp_processor_id()))
+#endif
 
 #ifndef CONFIG_NEED_MULTIPLE_NODES
 
@@ -453,12 +457,12 @@ extern struct pglist_data contig_page_data;
 #include <asm/sparsemem.h>
 #endif
 
-#if BITS_PER_LONG == 32 || defined(ARCH_HAS_ATOMIC_UNSIGNED)
+#if BITS_PER_LONG == 32
 /*
- * with 32 bit page->flags field, we reserve 8 bits for node/zone info.
- * there are 3 zones (2 bits) and this leaves 8-2=6 bits for nodes.
+ * with 32 bit page->flags field, we reserve 9 bits for node/zone info.
+ * there are 4 zones (3 bits) and this leaves 9-3=6 bits for nodes.
  */
-#define FLAGS_RESERVED		8
+#define FLAGS_RESERVED		9
 
 #elif BITS_PER_LONG == 64
 /*