diff options
Diffstat (limited to 'include/linux/mm.h')
| -rw-r--r-- | include/linux/mm.h | 43 |
1 files changed, 31 insertions, 12 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index 66d881f1d576..b87681adf0ba 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -25,11 +25,17 @@ struct file_ra_state; struct user_struct; struct writeback_control; -#ifndef CONFIG_DISCONTIGMEM /* Don't use mapnrs, do it properly */ +#ifndef CONFIG_NEED_MULTIPLE_NODES /* Don't use mapnrs, do it properly */ extern unsigned long max_mapnr; + +static inline void set_max_mapnr(unsigned long limit) +{ + max_mapnr = limit; +} +#else +static inline void set_max_mapnr(unsigned long limit) { } #endif -extern unsigned long num_physpages; extern unsigned long totalram_pages; extern void * high_memory; extern int page_cluster; @@ -52,6 +58,9 @@ extern unsigned long sysctl_admin_reserve_kbytes; /* to align the pointer to the (next) page boundary */ #define PAGE_ALIGN(addr) ALIGN(addr, PAGE_SIZE) +/* test whether an address (unsigned long or pointer) is aligned to PAGE_SIZE */ +#define PAGE_ALIGNED(addr) IS_ALIGNED((unsigned long)addr, PAGE_SIZE) + /* * Linux kernel virtual memory manager primitives. * The idea being to have a "virtual" mm in the same way @@ -1305,11 +1314,12 @@ extern void free_initmem(void); /* * Free reserved pages within range [PAGE_ALIGN(start), end & PAGE_MASK) * into the buddy system. The freed pages will be poisoned with pattern - * "poison" if it's non-zero. + * "poison" if it's within range [0, UCHAR_MAX]. * Return pages freed into the buddy system. */ -extern unsigned long free_reserved_area(unsigned long start, unsigned long end, +extern unsigned long free_reserved_area(void *start, void *end, int poison, char *s); + #ifdef CONFIG_HIGHMEM /* * Free a highmem page into the buddy system, adjusting totalhigh_pages @@ -1318,10 +1328,8 @@ extern unsigned long free_reserved_area(unsigned long start, unsigned long end, extern void free_highmem_page(struct page *page); #endif -static inline void adjust_managed_page_count(struct page *page, long count) -{ - totalram_pages += count; -} +extern void adjust_managed_page_count(struct page *page, long count); +extern void mem_init_print_info(const char *str); /* Free the reserved page into the buddy system, so it gets managed. */ static inline void __free_reserved_page(struct page *page) @@ -1345,18 +1353,29 @@ static inline void mark_page_reserved(struct page *page) /* * Default method to free all the __init memory into the buddy system. - * The freed pages will be poisoned with pattern "poison" if it is - * non-zero. Return pages freed into the buddy system. + * The freed pages will be poisoned with pattern "poison" if it's within + * range [0, UCHAR_MAX]. + * Return pages freed into the buddy system. */ static inline unsigned long free_initmem_default(int poison) { extern char __init_begin[], __init_end[]; - return free_reserved_area(PAGE_ALIGN((unsigned long)&__init_begin) , - ((unsigned long)&__init_end) & PAGE_MASK, + return free_reserved_area(&__init_begin, &__init_end, poison, "unused kernel"); } +static inline unsigned long get_num_physpages(void) +{ + int nid; + unsigned long phys_pages = 0; + + for_each_online_node(nid) + phys_pages += node_present_pages(nid); + + return phys_pages; +} + #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP /* * With CONFIG_HAVE_MEMBLOCK_NODE_MAP set, an architecture may initialise its |