[PATCH] add rcu_barrier() synchronization point

[linux-2.6-omap-h63xx.git] / include / linux / mmzone.h

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index f5fa3082fd6a56c628730c67873429f64f8d9cbb..9f22090df7dde381a177707cf745733ececbd320 100644 (file)
--- a/include/linux/mmzone.h
+++ b/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)) */
 
 
@@ -90,27 +91,18 @@ struct per_cpu_pageset {
  * will be a maximum of 4 (2 ** 2) zonelists, for 3 modifiers there will
  * be 8 (2 ** 3) zonelists.  GFP_ZONETYPES defines the number of possible
  * combinations of zone modifiers in "zone modifier space".
+ *
+ * NOTE! Make sure this matches the zones in <linux/gfp.h>
  */
-#define GFP_ZONEMASK   0x03
-/*
- * As an optimisation any zone modifier bits which are only valid when
- * no other zone modifier bits are set (loners) should be placed in
- * the highest order bits of this field.  This allows us to reduce the
- * extent of the zonelists thus saving space.  For example in the case
- * of three zone modifier bits, we could require up to eight zonelists.
- * If the left most zone modifier is a "loner" then the highest valid
- * zonelist would be four allowing us to allocate only five zonelists.
- * Use the first form when the left most bit is not a "loner", otherwise
- * use the second.
- */
-/* #define GFP_ZONETYPES       (GFP_ZONEMASK + 1) */           /* Non-loner */
-#define GFP_ZONETYPES  ((GFP_ZONEMASK + 1) / 2 + 1)            /* Loner */
+#define GFP_ZONEMASK   0x07
+#define GFP_ZONETYPES  5
 
 /*
  * 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
  */
@@ -329,7 +321,7 @@ void get_zone_counts(unsigned long *active, unsigned long *inactive,
 void build_all_zonelists(void);
 void wakeup_kswapd(struct zone *zone, int order);
 int zone_watermark_ok(struct zone *z, int order, unsigned long mark,
-               int alloc_type, int can_try_harder, gfp_t gfp_high);
+               int classzone_idx, int alloc_flags);
 
 #ifdef CONFIG_HAVE_MEMORY_PRESENT
 void memory_present(int nid, unsigned long start, unsigned long end);
@@ -433,7 +425,9 @@ 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 +447,12 @@ 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
 /*