mm: remove file argument from swap_readpage()

The file argument resulted from address_space's readpage long time ago.

We don't use it any more.  Let's remove unnecessary argement.

Signed-off-by: Minchan Kim <minchan.kim@gmail.com>
Acked-by: Hugh Dickins <hugh.dickins@tiscali.co.uk>
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>

3 files changed, 3 insertions, 3 deletions

diff --git a/include/linux/swap.h b/include/linux/swap.h
index fed5e8e1104b..0cedf31af0b0 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -256,7 +256,7 @@ extern void swap_unplug_io_fn(struct backing_dev_info *, struct page *);
 
 #ifdef CONFIG_SWAP
 /* linux/mm/page_io.c */
-extern int swap_readpage(struct file *, struct page *);
+extern int swap_readpage(struct page *);
 extern int swap_writepage(struct page *page, struct writeback_control *wbc);
 extern void end_swap_bio_read(struct bio *bio, int err);
 
diff --git a/mm/page_io.c b/mm/page_io.c
index 3023c475e041..c6f3e5071de3 100644
--- a/mm/page_io.c
+++ b/mm/page_io.c
@@ -120,7 +120,7 @@ out:
         return ret;
 }
 
-int swap_readpage(struct file *file, struct page *page)
+int swap_readpage(struct page *page)
 {
         struct bio *bio;
         int ret = 0;
diff --git a/mm/swap_state.c b/mm/swap_state.c
index b62e7f56051c..42cd38eba79f 100644
--- a/mm/swap_state.c
+++ b/mm/swap_state.c
@@ -313,7 +313,7 @@ struct page *read_swap_cache_async(swp_entry_t entry, gfp_t gfp_mask,
                          * Initiate read into locked page and return.
                          */
                         lru_cache_add_anon(new_page);
-                        swap_readpage(NULL, new_page);
+                        swap_readpage(new_page);
                         return new_page;
                 }
                 ClearPageSwapBacked(new_page);