Cross Reference: /drivers/block/brd.c

Lines Matching refs:page
31  * the pages containing the block device's contents. A brd page's ->index is
52  * Look up and return a brd's page for a given sector.
55 static struct page *brd_lookup_page(struct brd_device *brd, sector_t sector)
58 	struct page *page;
61 	 * The page lifetime is protected by the fact that we have opened the
72 	idx = sector >> PAGE_SECTORS_SHIFT; /* sector to page index */
73 	page = radix_tree_lookup(&brd->brd_pages, idx);
76 	BUG_ON(page && page->index != idx);
78 	return page;
82  * Look up and return a brd's page for a given sector.
83  * If one does not exist, allocate an empty page, and insert that. Then
86 static struct page *brd_insert_page(struct brd_device *brd, sector_t sector)
89 	struct page *page;
92 	page = brd_lookup_page(brd, sector);
93 	if (page)
94 		return page;
98 	 * block or filesystem layers from page reclaim.
109 	page = alloc_page(gfp_flags);
110 	if (!page)
114 		__free_page(page);
120 	if (radix_tree_insert(&brd->brd_pages, idx, page)) {
121 		__free_page(page);
122 		page = radix_tree_lookup(&brd->brd_pages, idx);
123 		BUG_ON(!page);
124 		BUG_ON(page->index != idx);
126 		page->index = idx;
131 	return page;
136 	struct page *page;
141 	page = radix_tree_delete(&brd->brd_pages, idx);
143 	if (page)
144 		__free_page(page);
149 	struct page *page;
151 	page = brd_lookup_page(brd, sector);
152 	if (page)
153 		clear_highpage(page);
164 	struct page *pages[FREE_BATCH];
236 	struct page *page;
242 	page = brd_lookup_page(brd, sector);
243 	BUG_ON(!page);
245 	dst = kmap_atomic(page);
253 		page = brd_lookup_page(brd, sector);
254 		BUG_ON(!page);
256 		dst = kmap_atomic(page);
268 	struct page *page;
274 	page = brd_lookup_page(brd, sector);
275 	if (page) {
276 		src = kmap_atomic(page);
286 		page = brd_lookup_page(brd, sector);
287 		if (page) {
288 			src = kmap_atomic(page);
299 static int brd_do_bvec(struct brd_device *brd, struct page *page,
312 	mem = kmap_atomic(page);
315 		flush_dcache_page(page);
317 		flush_dcache_page(page);
369 	struct page *page;
377 	page = brd_insert_page(brd, sector);
378 	if (!page)
380 	*kaddr = page_address(page);
381 	*pfn = page_to_pfn(page);