mm: add support for a filesystem to activate swap files and use direct_IO for writing...

[linux-2.6-block.git] / include / linux / swap.h

diff --git a/include/linux/swap.h b/include/linux/swap.h
index e62425ded2edf8c69f556c2212de40f1a2b5ab70..ab230b1ebf6151a7432a8cca3f6b72e3d66a74d1 100644 (file)
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -151,6 +151,7 @@ enum {
        SWP_SOLIDSTATE  = (1 << 4),     /* blkdev seeks are cheap */
        SWP_CONTINUED   = (1 << 5),     /* swap_map has count continuation */
        SWP_BLKDEV      = (1 << 6),     /* its a block device */
+       SWP_FILE        = (1 << 7),     /* set after swap_activate success */
                                        /* add others here before... */
        SWP_SCANNING    = (1 << 8),     /* refcount in scan_swap_map */
 };
@@ -320,6 +321,7 @@ static inline void mem_cgroup_uncharge_swap(swp_entry_t ent)
 /* linux/mm/page_io.c */
 extern int swap_readpage(struct page *);
 extern int swap_writepage(struct page *page, struct writeback_control *wbc);
+extern int swap_set_page_dirty(struct page *page);
 extern void end_swap_bio_read(struct bio *bio, int err);
 
 /* linux/mm/swap_state.c */