55 static struct page *brd_lookup_page(struct brd_device *brd, sector_t sector)  in brd_lookup_page()  argument
72 	idx = sector >> PAGE_SECTORS_SHIFT; /* sector to page index */  in brd_lookup_page()
86 static struct page *brd_insert_page(struct brd_device *brd, sector_t sector)  in brd_insert_page()  argument
92 	page = brd_lookup_page(brd, sector);  in brd_insert_page()
119 	idx = sector >> PAGE_SECTORS_SHIFT;  in brd_insert_page()
134 static void brd_free_page(struct brd_device *brd, sector_t sector)  in brd_free_page()  argument
140 	idx = sector >> PAGE_SECTORS_SHIFT;  in brd_free_page()
147 static void brd_zero_page(struct brd_device *brd, sector_t sector)  in brd_zero_page()  argument
151 	page = brd_lookup_page(brd, sector);  in brd_zero_page()
196 static int copy_to_brd_setup(struct brd_device *brd, sector_t sector, size_t n)  in copy_to_brd_setup()  argument
198 	unsigned int offset = (sector & (PAGE_SECTORS-1)) << SECTOR_SHIFT;  in copy_to_brd_setup()
202 	if (!brd_insert_page(brd, sector))  in copy_to_brd_setup()
205 		sector += copy >> SECTOR_SHIFT;  in copy_to_brd_setup()
206 		if (!brd_insert_page(brd, sector))  in copy_to_brd_setup()
213 			sector_t sector, size_t n)  in discard_from_brd()  argument
222 			brd_free_page(brd, sector);  in discard_from_brd()
224 			brd_zero_page(brd, sector);  in discard_from_brd()
225 		sector += PAGE_SIZE >> SECTOR_SHIFT;  in discard_from_brd()
234 			sector_t sector, size_t n)  in copy_to_brd()  argument
238 	unsigned int offset = (sector & (PAGE_SECTORS-1)) << SECTOR_SHIFT;  in copy_to_brd()
242 	page = brd_lookup_page(brd, sector);  in copy_to_brd()
251 		sector += copy >> SECTOR_SHIFT;  in copy_to_brd()
253 		page = brd_lookup_page(brd, sector);  in copy_to_brd()
266 			sector_t sector, size_t n)  in copy_from_brd()  argument
270 	unsigned int offset = (sector & (PAGE_SECTORS-1)) << SECTOR_SHIFT;  in copy_from_brd()
274 	page = brd_lookup_page(brd, sector);  in copy_from_brd()
284 		sector += copy >> SECTOR_SHIFT;  in copy_from_brd()
286 		page = brd_lookup_page(brd, sector);  in copy_from_brd()
301 			sector_t sector)  in brd_do_bvec()  argument
307 		err = copy_to_brd_setup(brd, sector, len);  in brd_do_bvec()
314 		copy_from_brd(mem + off, brd, sector, len);  in brd_do_bvec()
318 		copy_to_brd(brd, mem + off, sector, len);  in brd_do_bvec()
332 	sector_t sector;  in brd_make_request()  local
336 	sector = bio->bi_sector;  in brd_make_request()
342 		discard_from_brd(brd, sector, bio->bi_size);  in brd_make_request()
353 					bvec->bv_offset, rw, sector);  in brd_make_request()
356 		sector += len >> SECTOR_SHIFT;  in brd_make_request()
364 static int brd_direct_access(struct block_device *bdev, sector_t sector,  in brd_direct_access()  argument
372 	if (sector & (PAGE_SECTORS-1))  in brd_direct_access()
374 	if (sector + PAGE_SECTORS > get_capacity(bdev->bd_disk))  in brd_direct_access()
376 	page = brd_insert_page(brd, sector);  in brd_direct_access()