diff options
Diffstat (limited to 'include/linux/mm.h')
| -rw-r--r-- | include/linux/mm.h | 85 |
1 files changed, 22 insertions, 63 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index ed6407d1b7b5..727f799757ab 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -72,6 +72,10 @@ extern int mmap_rnd_compat_bits __read_mostly; #define __pa_symbol(x) __pa(RELOC_HIDE((unsigned long)(x), 0)) #endif +#ifndef page_to_virt +#define page_to_virt(x) __va(PFN_PHYS(page_to_pfn(x))) +#endif + /* * To prevent common memory management code establishing * a zero page mapping on a read fault. @@ -500,11 +504,20 @@ static inline int page_mapcount(struct page *page) #ifdef CONFIG_TRANSPARENT_HUGEPAGE int total_mapcount(struct page *page); +int page_trans_huge_mapcount(struct page *page, int *total_mapcount); #else static inline int total_mapcount(struct page *page) { return page_mapcount(page); } +static inline int page_trans_huge_mapcount(struct page *page, + int *total_mapcount) +{ + int mapcount = page_mapcount(page); + if (total_mapcount) + *total_mapcount = mapcount; + return mapcount; +} #endif static inline struct page *virt_to_head_page(const void *x) @@ -623,7 +636,7 @@ void do_set_pte(struct vm_area_struct *vma, unsigned long address, * * A page may belong to an inode's memory mapping. In this case, page->mapping * is the pointer to the inode, and page->index is the file offset of the page, - * in units of PAGE_CACHE_SIZE. + * in units of PAGE_SIZE. * * If pagecache pages are not associated with an inode, they are said to be * anonymous pages. These may become associated with the swapcache, and in that @@ -948,7 +961,7 @@ static inline struct mem_cgroup *page_memcg(struct page *page) static __always_inline void *lowmem_page_address(const struct page *page) { - return __va(PFN_PHYS(page_to_pfn(page))); + return page_to_virt(page); } #if defined(CONFIG_HIGHMEM) && !defined(WANT_PAGE_VIRTUAL) @@ -1031,6 +1044,8 @@ static inline bool page_mapped(struct page *page) page = compound_head(page); if (atomic_read(compound_mapcount_ptr(page)) >= 0) return true; + if (PageHuge(page)) + return false; for (i = 0; i < hpage_nr_pages(page); i++) { if (atomic_read(&page[i]._mapcount) >= 0) return true; @@ -1138,6 +1153,8 @@ struct zap_details { struct page *vm_normal_page(struct vm_area_struct *vma, unsigned long addr, pte_t pte); +struct page *vm_normal_page_pmd(struct vm_area_struct *vma, unsigned long addr, + pmd_t pmd); int zap_vma_ptes(struct vm_area_struct *vma, unsigned long address, unsigned long size); @@ -1250,78 +1267,20 @@ long get_user_pages_remote(struct task_struct *tsk, struct mm_struct *mm, unsigned long start, unsigned long nr_pages, int write, int force, struct page **pages, struct vm_area_struct **vmas); -long get_user_pages6(unsigned long start, unsigned long nr_pages, +long get_user_pages(unsigned long start, unsigned long nr_pages, int write, int force, struct page **pages, struct vm_area_struct **vmas); -long get_user_pages_locked6(unsigned long start, unsigned long nr_pages, +long get_user_pages_locked(unsigned long start, unsigned long nr_pages, int write, int force, struct page **pages, int *locked); long __get_user_pages_unlocked(struct task_struct *tsk, struct mm_struct *mm, unsigned long start, unsigned long nr_pages, int write, int force, struct page **pages, unsigned int gup_flags); -long get_user_pages_unlocked5(unsigned long start, unsigned long nr_pages, +long get_user_pages_unlocked(unsigned long start, unsigned long nr_pages, int write, int force, struct page **pages); int get_user_pages_fast(unsigned long start, int nr_pages, int write, struct page **pages); -/* suppress warnings from use in EXPORT_SYMBOL() */ -#ifndef __DISABLE_GUP_DEPRECATED -#define __gup_deprecated __deprecated -#else -#define __gup_deprecated -#endif -/* - * These macros provide backward-compatibility with the old - * get_user_pages() variants which took tsk/mm. These - * functions/macros provide both compile-time __deprecated so we - * can catch old-style use and not break the build. The actual - * functions also have WARN_ON()s to let us know at runtime if - * the get_user_pages() should have been the "remote" variant. - * - * These are hideous, but temporary. - * - * If you run into one of these __deprecated warnings, look - * at how you are calling get_user_pages(). If you are calling - * it with current/current->mm as the first two arguments, - * simply remove those arguments. The behavior will be the same - * as it is now. If you are calling it on another task, use - * get_user_pages_remote() instead. - * - * Any questions? Ask Dave Hansen <dave@sr71.net> - */ -long -__gup_deprecated -get_user_pages8(struct task_struct *tsk, struct mm_struct *mm, - unsigned long start, unsigned long nr_pages, - int write, int force, struct page **pages, - struct vm_area_struct **vmas); -#define GUP_MACRO(_1, _2, _3, _4, _5, _6, _7, _8, get_user_pages, ...) \ - get_user_pages -#define get_user_pages(...) GUP_MACRO(__VA_ARGS__, \ - get_user_pages8, x, \ - get_user_pages6, x, x, x, x, x)(__VA_ARGS__) - -__gup_deprecated -long get_user_pages_locked8(struct task_struct *tsk, struct mm_struct *mm, - unsigned long start, unsigned long nr_pages, - int write, int force, struct page **pages, - int *locked); -#define GUPL_MACRO(_1, _2, _3, _4, _5, _6, _7, _8, get_user_pages_locked, ...) \ - get_user_pages_locked -#define get_user_pages_locked(...) GUPL_MACRO(__VA_ARGS__, \ - get_user_pages_locked8, x, \ - get_user_pages_locked6, x, x, x, x)(__VA_ARGS__) - -__gup_deprecated -long get_user_pages_unlocked7(struct task_struct *tsk, struct mm_struct *mm, - unsigned long start, unsigned long nr_pages, - int write, int force, struct page **pages); -#define GUPU_MACRO(_1, _2, _3, _4, _5, _6, _7, get_user_pages_unlocked, ...) \ - get_user_pages_unlocked -#define get_user_pages_unlocked(...) GUPU_MACRO(__VA_ARGS__, \ - get_user_pages_unlocked7, x, \ - get_user_pages_unlocked5, x, x, x, x)(__VA_ARGS__) - /* Container for pinned pfns / pages */ struct frame_vector { unsigned int nr_allocated; /* Number of frames we have space for */ |