diff options
Diffstat (limited to 'include/linux/mm.h')
| -rw-r--r-- | include/linux/mm.h | 45 |
1 files changed, 43 insertions, 2 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index 5005464fe012..27eb1bfbe704 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -18,6 +18,7 @@ #include <linux/pfn.h> #include <linux/bit_spinlock.h> #include <linux/shrinker.h> +#include <linux/resource.h> struct mempolicy; struct anon_vma; @@ -346,6 +347,7 @@ static inline int put_page_unless_one(struct page *page) } extern int page_is_ram(unsigned long pfn); +extern int region_is_ram(resource_size_t phys_addr, unsigned long size); /* Support for virtually mapped pages */ struct page *vmalloc_to_page(const void *addr); @@ -553,6 +555,25 @@ static inline void __ClearPageBuddy(struct page *page) atomic_set(&page->_mapcount, -1); } +#define PAGE_BALLOON_MAPCOUNT_VALUE (-256) + +static inline int PageBalloon(struct page *page) +{ + return atomic_read(&page->_mapcount) == PAGE_BALLOON_MAPCOUNT_VALUE; +} + +static inline void __SetPageBalloon(struct page *page) +{ + VM_BUG_ON_PAGE(atomic_read(&page->_mapcount) != -1, page); + atomic_set(&page->_mapcount, PAGE_BALLOON_MAPCOUNT_VALUE); +} + +static inline void __ClearPageBalloon(struct page *page) +{ + VM_BUG_ON_PAGE(!PageBalloon(page), page); + atomic_set(&page->_mapcount, -1); +} + void put_page(struct page *page); void put_pages_list(struct list_head *pages); @@ -1248,8 +1269,8 @@ static inline int stack_guard_page_end(struct vm_area_struct *vma, !vma_growsup(vma->vm_next, addr); } -extern pid_t -vm_is_stack(struct task_struct *task, struct vm_area_struct *vma, int in_group); +extern struct task_struct *task_of_stack(struct task_struct *task, + struct vm_area_struct *vma, bool in_group); extern unsigned long move_page_tables(struct vm_area_struct *vma, unsigned long old_addr, struct vm_area_struct *new_vma, @@ -1781,6 +1802,20 @@ extern struct vm_area_struct *copy_vma(struct vm_area_struct **, bool *need_rmap_locks); extern void exit_mmap(struct mm_struct *); +static inline int check_data_rlimit(unsigned long rlim, + unsigned long new, + unsigned long start, + unsigned long end_data, + unsigned long start_data) +{ + if (rlim < RLIM_INFINITY) { + if (((new - start) + (end_data - start_data)) > rlim) + return -ENOSPC; + } + + return 0; +} + extern int mm_take_all_locks(struct mm_struct *mm); extern void mm_drop_all_locks(struct mm_struct *mm); @@ -1940,11 +1975,16 @@ static inline struct vm_area_struct *find_exact_vma(struct mm_struct *mm, #ifdef CONFIG_MMU pgprot_t vm_get_page_prot(unsigned long vm_flags); +void vma_set_page_prot(struct vm_area_struct *vma); #else static inline pgprot_t vm_get_page_prot(unsigned long vm_flags) { return __pgprot(0); } +static inline void vma_set_page_prot(struct vm_area_struct *vma) +{ + vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); +} #endif #ifdef CONFIG_NUMA_BALANCING @@ -1986,6 +2026,7 @@ static inline struct page *follow_page(struct vm_area_struct *vma, #define FOLL_HWPOISON 0x100 /* check page is hwpoisoned */ #define FOLL_NUMA 0x200 /* force NUMA hinting page fault */ #define FOLL_MIGRATION 0x400 /* wait for page to replace migration entry */ +#define FOLL_TRIED 0x800 /* a retry, previous pass started an IO */ typedef int (*pte_fn_t)(pte_t *pte, pgtable_t token, unsigned long addr, void *data); |