diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/mmzone.h | 4 | ||||
| -rw-r--r-- | include/linux/pageblock-flags.h | 25 |
2 files changed, 26 insertions, 3 deletions
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index fef08c6cf75e..87a4045580f2 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -235,7 +235,7 @@ struct zone { #ifndef CONFIG_SPARSEMEM /* - * Flags for a MAX_ORDER_NR_PAGES block. See pageblock-flags.h. + * Flags for a pageblock_nr_pages block. See pageblock-flags.h. * In SPARSEMEM, this map is stored in struct mem_section */ unsigned long *pageblock_flags; @@ -740,7 +740,7 @@ extern struct zone *next_zone(struct zone *zone); #define PAGE_SECTION_MASK (~(PAGES_PER_SECTION-1)) #define SECTION_BLOCKFLAGS_BITS \ - ((1 << (PFN_SECTION_SHIFT - (MAX_ORDER-1))) * NR_PAGEBLOCK_BITS) + ((1UL << (PFN_SECTION_SHIFT - pageblock_order)) * NR_PAGEBLOCK_BITS) #if (MAX_ORDER - 1 + PAGE_SHIFT) > SECTION_SIZE_BITS #error Allocator MAX_ORDER exceeds SECTION_SIZE diff --git a/include/linux/pageblock-flags.h b/include/linux/pageblock-flags.h index 5456da6b4ade..9ea130829fb4 100644 --- a/include/linux/pageblock-flags.h +++ b/include/linux/pageblock-flags.h @@ -1,6 +1,6 @@ /* * Macros for manipulating and testing flags related to a - * MAX_ORDER_NR_PAGES block of pages. + * pageblock_nr_pages number of pages. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -35,6 +35,29 @@ enum pageblock_bits { NR_PAGEBLOCK_BITS }; +#ifdef CONFIG_HUGETLB_PAGE + +#ifdef CONFIG_HUGETLB_PAGE_SIZE_VARIABLE + +/* Huge page sizes are variable */ +extern int pageblock_order; + +#else /* CONFIG_HUGETLB_PAGE_SIZE_VARIABLE */ + +/* Huge pages are a constant size */ +#define pageblock_order HUGETLB_PAGE_ORDER + +#endif /* CONFIG_HUGETLB_PAGE_SIZE_VARIABLE */ + +#else /* CONFIG_HUGETLB_PAGE */ + +/* If huge pages are not used, group by MAX_ORDER_NR_PAGES */ +#define pageblock_order (MAX_ORDER-1) + +#endif /* CONFIG_HUGETLB_PAGE */ + +#define pageblock_nr_pages (1UL << pageblock_order) + /* Forward declaration */ struct page; |