f2fs: support swapfile

This patch adds f2fs_bmap operation to the data address space.
This enables f2fs to support swapfile.

Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index b1347fc6d688..7bd22a201125 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -698,6 +698,11 @@ static int f2fs_set_data_page_dirty(struct page *page)
         return 0;
 }
 
+static sector_t f2fs_bmap(struct address_space *mapping, sector_t block)
+{
+        return generic_block_bmap(mapping, block, get_data_block_ro);
+}
+
 const struct address_space_operations f2fs_dblock_aops = {
         .readpage       = f2fs_read_data_page,
         .readpages      = f2fs_read_data_pages,
@@ -709,4 +714,5 @@ const struct address_space_operations f2fs_dblock_aops = {
         .invalidatepage = f2fs_invalidate_data_page,
         .releasepage    = f2fs_release_data_page,
         .direct_IO      = f2fs_direct_IO,
+        .bmap           = f2fs_bmap,
 };