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-rw-r--r--include/linux/mm.h52
1 files changed, 33 insertions, 19 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h
index e0c8528a41a..f0224608d15 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
@@ -142,12 +151,6 @@ extern unsigned int kobjsize(const void *objp);
#define VM_STACK_FLAGS (VM_GROWSDOWN | VM_STACK_DEFAULT_FLAGS | VM_ACCOUNT)
#endif
-#define VM_READHINTMASK (VM_SEQ_READ | VM_RAND_READ)
-#define VM_ClearReadHint(v) (v)->vm_flags &= ~VM_READHINTMASK
-#define VM_NormalReadHint(v) (!((v)->vm_flags & VM_READHINTMASK))
-#define VM_SequentialReadHint(v) ((v)->vm_flags & VM_SEQ_READ)
-#define VM_RandomReadHint(v) ((v)->vm_flags & VM_RAND_READ)
-
/*
* Special vmas that are non-mergable, non-mlock()able.
* Note: mm/huge_memory.c VM_NO_THP depends on this definition.
@@ -1041,7 +1044,8 @@ int get_kernel_page(unsigned long start, int write, struct page **pages);
struct page *get_dump_page(unsigned long addr);
extern int try_to_release_page(struct page * page, gfp_t gfp_mask);
-extern void do_invalidatepage(struct page *page, unsigned long offset);
+extern void do_invalidatepage(struct page *page, unsigned int offset,
+ unsigned int length);
int __set_page_dirty_nobuffers(struct page *page);
int __set_page_dirty_no_writeback(struct page *page);
@@ -1304,11 +1308,12 @@ 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
@@ -1317,10 +1322,8 @@ 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)
@@ -1344,18 +1347,29 @@ 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