55 static struct page *brd_lookup_page(struct brd_device *brd, sector_t sector)  in brd_lookup_page()
58 	struct page *page;  in brd_lookup_page()  local
73 	page = radix_tree_lookup(&brd->brd_pages, idx);  in brd_lookup_page()
76 	BUG_ON(page && page->index != idx);  in brd_lookup_page()
78 	return page;  in brd_lookup_page()
86 static struct page *brd_insert_page(struct brd_device *brd, sector_t sector)  in brd_insert_page()
89 	struct page *page;  in brd_insert_page()  local
92 	page = brd_lookup_page(brd, sector);  in brd_insert_page()
93 	if (page)  in brd_insert_page()
94 		return page;  in brd_insert_page()
109 	page = alloc_page(gfp_flags);  in brd_insert_page()
110 	if (!page)  in brd_insert_page()
114 		__free_page(page);  in brd_insert_page()
120 	page->index = idx;  in brd_insert_page()
121 	if (radix_tree_insert(&brd->brd_pages, idx, page)) {  in brd_insert_page()
122 		__free_page(page);  in brd_insert_page()
123 		page = radix_tree_lookup(&brd->brd_pages, idx);  in brd_insert_page()
124 		BUG_ON(!page);  in brd_insert_page()
125 		BUG_ON(page->index != idx);  in brd_insert_page()
131 	return page;  in brd_insert_page()
136 	struct page *page;  in brd_free_page()  local
141 	page = radix_tree_delete(&brd->brd_pages, idx);  in brd_free_page()
143 	if (page)  in brd_free_page()
144 		__free_page(page);  in brd_free_page()
149 	struct page *page;  in brd_zero_page()  local
151 	page = brd_lookup_page(brd, sector);  in brd_zero_page()
152 	if (page)  in brd_zero_page()
153 		clear_highpage(page);  in brd_zero_page()
164 	struct page *pages[FREE_BATCH];  in brd_free_pages()
236 	struct page *page;  in copy_to_brd()  local
242 	page = brd_lookup_page(brd, sector);  in copy_to_brd()
243 	BUG_ON(!page);  in copy_to_brd()
245 	dst = kmap_atomic(page);  in copy_to_brd()
253 		page = brd_lookup_page(brd, sector);  in copy_to_brd()
254 		BUG_ON(!page);  in copy_to_brd()
256 		dst = kmap_atomic(page);  in copy_to_brd()
268 	struct page *page;  in copy_from_brd()  local
274 	page = brd_lookup_page(brd, sector);  in copy_from_brd()
275 	if (page) {  in copy_from_brd()
276 		src = kmap_atomic(page);  in copy_from_brd()
286 		page = brd_lookup_page(brd, sector);  in copy_from_brd()
287 		if (page) {  in copy_from_brd()
288 			src = kmap_atomic(page);  in copy_from_brd()
299 static int brd_do_bvec(struct brd_device *brd, struct page *page,  in brd_do_bvec()  argument
312 	mem = kmap_atomic(page);  in brd_do_bvec()
315 		flush_dcache_page(page);  in brd_do_bvec()
317 		flush_dcache_page(page);  in brd_do_bvec()
371 		       struct page *page, int rw)  in brd_rw_page()  argument
374 	int err = brd_do_bvec(brd, page, PAGE_CACHE_SIZE, 0, rw, sector);  in brd_rw_page()
375 	page_endio(page, rw & WRITE, err);  in brd_rw_page()
384 	struct page *page;  in brd_direct_access()  local
388 	page = brd_insert_page(brd, sector);  in brd_direct_access()
389 	if (!page)  in brd_direct_access()
391 	*kaddr = (void __pmem *)page_address(page);  in brd_direct_access()
392 	*pfn = page_to_pfn(page);  in brd_direct_access()