nilfs2: add sync_page method to page caches of meta data

This applies block_sync_page() function to the sync_page method of
page caches for meta data files, gc page caches, and btree node
buffers.  This is a companion patch of ("nilfs2: enable sync_page
mothod") which applied the function for data pages.

This allows lock_page() for those meta data to unplug pending bio
requests.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>

3 files changed, 7 insertions, 3 deletions

diff --git a/fs/nilfs2/btnode.c b/fs/nilfs2/btnode.c
index 0e01957ce566..7e0b61be212e 100644
--- a/fs/nilfs2/btnode.c
+++ b/fs/nilfs2/btnode.c
@@ -46,7 +46,9 @@ void nilfs_btnode_cache_init_once(struct address_space *btnc)
         INIT_LIST_HEAD(&btnc->i_mmap_nonlinear);
 }
 
-static struct address_space_operations def_btnode_aops;
+static struct address_space_operations def_btnode_aops = {
+        .sync_page              = block_sync_page,
+};
 
 void nilfs_btnode_cache_init(struct address_space *btnc,
                              struct backing_dev_info *bdi)
diff --git a/fs/nilfs2/gcinode.c b/fs/nilfs2/gcinode.c
index 19d2102b6a69..1b3c2bb20da9 100644
--- a/fs/nilfs2/gcinode.c
+++ b/fs/nilfs2/gcinode.c
@@ -52,8 +52,9 @@
 #include "dat.h"
 #include "ifile.h"
 
-static struct address_space_operations def_gcinode_aops = {};
-/* XXX need def_gcinode_iops/fops? */
+static struct address_space_operations def_gcinode_aops = {
+        .sync_page              = block_sync_page,
+};
 
 /*
  * nilfs_gccache_submit_read_data() - add data buffer and submit read request
diff --git a/fs/nilfs2/mdt.c b/fs/nilfs2/mdt.c
index 7b7032ea60d3..3d3ddb3f5177 100644
--- a/fs/nilfs2/mdt.c
+++ b/fs/nilfs2/mdt.c
@@ -430,6 +430,7 @@ nilfs_mdt_write_page(struct page *page, struct writeback_control *wbc)
 
 static struct address_space_operations def_mdt_aops = {
         .writepage              = nilfs_mdt_write_page,
+        .sync_page              = block_sync_page,
 };
 
 static struct inode_operations def_mdt_iops;