diff options
Diffstat (limited to 'include/linux/mmzone.h')
| -rw-r--r-- | include/linux/mmzone.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index f6167f2fd7fb..322e8048463e 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -13,6 +13,7 @@ #include <linux/init.h> #include <linux/seqlock.h> #include <linux/nodemask.h> +#include <linux/pageblock-flags.h> #include <asm/atomic.h> #include <asm/page.h> @@ -222,6 +223,14 @@ struct zone { #endif struct free_area free_area[MAX_ORDER]; +#ifndef CONFIG_SPARSEMEM + /* + * Flags for a MAX_ORDER_NR_PAGES block. See pageblock-flags.h. + * In SPARSEMEM, this map is stored in struct mem_section + */ + unsigned long *pageblock_flags; +#endif /* CONFIG_SPARSEMEM */ + ZONE_PADDING(_pad1_) @@ -720,6 +729,9 @@ extern struct zone *next_zone(struct zone *zone); #define PAGES_PER_SECTION (1UL << PFN_SECTION_SHIFT) #define PAGE_SECTION_MASK (~(PAGES_PER_SECTION-1)) +#define SECTION_BLOCKFLAGS_BITS \ + ((SECTION_SIZE_BITS - (MAX_ORDER-1)) * NR_PAGEBLOCK_BITS) + #if (MAX_ORDER - 1 + PAGE_SHIFT) > SECTION_SIZE_BITS #error Allocator MAX_ORDER exceeds SECTION_SIZE #endif @@ -739,6 +751,7 @@ struct mem_section { * before using it wrong. */ unsigned long section_mem_map; + DECLARE_BITMAP(pageblock_flags, SECTION_BLOCKFLAGS_BITS); }; #ifdef CONFIG_SPARSEMEM_EXTREME |