17  * kmap - Map a page for long term usage
18  * @page:	Pointer to the page to be mapped
37 static inline void *kmap(struct page *page);
46 static inline void kunmap(struct page *page);
49  * kmap_to_page - Get the page for a kmap'ed address
52  * Returns: The page which is mapped to @addr.
54 static inline struct page *kmap_to_page(void *addr);
63  * kmap_local_page - Map a page for temporary usage
64  * @page:	Pointer to the page to be mapped
93  * On HIGHMEM enabled systems mapping a highmem page has the side effect of
97 static inline void *kmap_local_page(struct page *page);
100  * kmap_atomic - Atomically map a page for temporary usage - Deprecated!
101  * @page:	Pointer to the page to be mapped
110 static inline void *kmap_atomic(struct page *page);
128 static inline void flush_anon_page(struct vm_area_struct *vma, struct page *page, unsigned long vma…  in flush_anon_page()  argument
144 static inline void clear_user_highpage(struct page *page, unsigned long vaddr)  in clear_user_highpage()  argument
146 	void *addr = kmap_atomic(page);  in clear_user_highpage()
147 	clear_user_page(addr, vaddr, page);  in clear_user_highpage()
154 …* alloc_zeroed_user_highpage_movable - Allocate a zeroed HIGHMEM page for a VMA that the caller kn…
155  * @vma: The VMA the page is to be allocated for
156  * @vaddr: The virtual address the page will be inserted into
158  * This function will allocate a page for a VMA that the caller knows will
165 static inline struct page *
169 	struct page *page = alloc_page_vma(GFP_HIGHUSER_MOVABLE, vma, vaddr);  in alloc_zeroed_user_highpage_movable()  local
171 	if (page)  in alloc_zeroed_user_highpage_movable()
172 		clear_user_highpage(page, vaddr);  in alloc_zeroed_user_highpage_movable()
174 	return page;  in alloc_zeroed_user_highpage_movable()
178 static inline void clear_highpage(struct page *page)  in clear_highpage()  argument
180 	void *kaddr = kmap_atomic(page);  in clear_highpage()
187 static inline void tag_clear_highpage(struct page *page)  in tag_clear_highpage()  argument
194  * If we pass in a base or tail page, we can zero up to PAGE_SIZE.
195  * If we pass in a head page, we can zero up to the size of the compound page.
198 void zero_user_segments(struct page *page, unsigned start1, unsigned end1,
201 static inline void zero_user_segments(struct page *page,  in zero_user_segments()  argument
205 	void *kaddr = kmap_atomic(page);  in zero_user_segments()
208 	BUG_ON(end1 > page_size(page) || end2 > page_size(page));  in zero_user_segments()
217 	for (i = 0; i < compound_nr(page); i++)  in zero_user_segments()
218 		flush_dcache_page(page + i);  in zero_user_segments()
222 static inline void zero_user_segment(struct page *page,  in zero_user_segment()  argument
225 	zero_user_segments(page, start, end, 0, 0);  in zero_user_segment()
228 static inline void zero_user(struct page *page,  in zero_user()  argument
231 	zero_user_segments(page, start, start + size, 0, 0);  in zero_user()
236 static inline void copy_user_highpage(struct page *to, struct page *from,  in copy_user_highpage()
252 static inline void copy_highpage(struct page *to, struct page *from)  in copy_highpage()
265 static inline void memcpy_page(struct page *dst_page, size_t dst_off,  in memcpy_page()
266 			       struct page *src_page, size_t src_off,  in memcpy_page()
278 static inline void memmove_page(struct page *dst_page, size_t dst_off,  in memmove_page()
279 			       struct page *src_page, size_t src_off,  in memmove_page()
291 static inline void memset_page(struct page *page, size_t offset, int val,  in memset_page()  argument
294 	char *addr = kmap_local_page(page);  in memset_page()
301 static inline void memcpy_from_page(char *to, struct page *page,  in memcpy_from_page()  argument
304 	char *from = kmap_local_page(page);  in memcpy_from_page()
311 static inline void memcpy_to_page(struct page *page, size_t offset,  in memcpy_to_page()  argument
314 	char *to = kmap_local_page(page);  in memcpy_to_page()
318 	flush_dcache_page(page);  in memcpy_to_page()
322 static inline void memzero_page(struct page *page, size_t offset, size_t len)  in memzero_page()  argument
324 	char *addr = kmap_local_page(page);  in memzero_page()
326 	flush_dcache_page(page);  in memzero_page()