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authorHugh Dickins <hugh.dickins@tiscali.co.uk>2009-12-15 01:58:40 (GMT)
committerLinus Torvalds <torvalds@linux-foundation.org>2009-12-15 16:53:13 (GMT)
commitf29ad6a99b596b8169744d107bf088e8be9e8d0d (patch)
treee138bf9eeb751defd358eb5aca8113e2645ded3d /mm/page_io.c
parent976d6dfbb0175d136fc098854bbce0c028a3924b (diff)
swap_info: private to swapfile.c
The swap_info_struct is mostly private to mm/swapfile.c, with only one other in-tree user: get_swap_bio(). Adjust its interface to map_swap_page(), so that we can then remove get_swap_info_struct(). But there is a popular user out-of-tree, TuxOnIce: so leave the declaration of swap_info_struct in linux/swap.h. Signed-off-by: Hugh Dickins <hugh.dickins@tiscali.co.uk> Cc: Nigel Cunningham <ncunningham@crca.org.au> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Reviewed-by: Rik van Riel <riel@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/page_io.c')
-rw-r--r--mm/page_io.c19
1 files changed, 7 insertions, 12 deletions
diff --git a/mm/page_io.c b/mm/page_io.c
index c6f3e50..afeed89 100644
--- a/mm/page_io.c
+++ b/mm/page_io.c
@@ -19,20 +19,17 @@
#include <linux/writeback.h>
#include <asm/pgtable.h>
-static struct bio *get_swap_bio(gfp_t gfp_flags, pgoff_t index,
+static struct bio *get_swap_bio(gfp_t gfp_flags,
struct page *page, bio_end_io_t end_io)
{
struct bio *bio;
bio = bio_alloc(gfp_flags, 1);
if (bio) {
- struct swap_info_struct *sis;
- swp_entry_t entry = { .val = index, };
-
- sis = get_swap_info_struct(swp_type(entry));
- bio->bi_sector = map_swap_page(sis, swp_offset(entry)) *
- (PAGE_SIZE >> 9);
- bio->bi_bdev = sis->bdev;
+ swp_entry_t entry;
+ entry.val = page_private(page);
+ bio->bi_sector = map_swap_page(entry, &bio->bi_bdev);
+ bio->bi_sector <<= PAGE_SHIFT - 9;
bio->bi_io_vec[0].bv_page = page;
bio->bi_io_vec[0].bv_len = PAGE_SIZE;
bio->bi_io_vec[0].bv_offset = 0;
@@ -102,8 +99,7 @@ int swap_writepage(struct page *page, struct writeback_control *wbc)
unlock_page(page);
goto out;
}
- bio = get_swap_bio(GFP_NOIO, page_private(page), page,
- end_swap_bio_write);
+ bio = get_swap_bio(GFP_NOIO, page, end_swap_bio_write);
if (bio == NULL) {
set_page_dirty(page);
unlock_page(page);
@@ -127,8 +123,7 @@ int swap_readpage(struct page *page)
VM_BUG_ON(!PageLocked(page));
VM_BUG_ON(PageUptodate(page));
- bio = get_swap_bio(GFP_KERNEL, page_private(page), page,
- end_swap_bio_read);
+ bio = get_swap_bio(GFP_KERNEL, page, end_swap_bio_read);
if (bio == NULL) {
unlock_page(page);
ret = -ENOMEM;

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