1 files changed, 35 insertions, 42 deletions

diff --git a/fs/nilfs2/btnode.c b/fs/nilfs2/btnode.c
index 84c25382f8e3..447ce47a3306 100644
--- a/fs/nilfs2/btnode.c
+++ b/fs/nilfs2/btnode.c
@@ -27,6 +27,7 @@
 #include <linux/buffer_head.h>
 #include <linux/mm.h>
 #include <linux/backing-dev.h>
+#include <linux/gfp.h>
 #include "nilfs.h"
 #include "mdt.h"
 #include "dat.h"
@@ -68,9 +69,34 @@ void nilfs_btnode_cache_clear(struct address_space *btnc)
         truncate_inode_pages(btnc, 0);
 }
 
+struct buffer_head *
+nilfs_btnode_create_block(struct address_space *btnc, __u64 blocknr)
+{
+        struct inode *inode = NILFS_BTNC_I(btnc);
+        struct buffer_head *bh;
+
+        bh = nilfs_grab_buffer(inode, btnc, blocknr, 1 << BH_NILFS_Node);
+        if (unlikely(!bh))
+                return NULL;
+
+        if (unlikely(buffer_mapped(bh) || buffer_uptodate(bh) ||
+                     buffer_dirty(bh))) {
+                brelse(bh);
+                BUG();
+        }
+        memset(bh->b_data, 0, 1 << inode->i_blkbits);
+        bh->b_bdev = NILFS_I_NILFS(inode)->ns_bdev;
+        bh->b_blocknr = blocknr;
+        set_buffer_mapped(bh);
+        set_buffer_uptodate(bh);
+
+        unlock_page(bh->b_page);
+        page_cache_release(bh->b_page);
+        return bh;
+}
+
 int nilfs_btnode_submit_block(struct address_space *btnc, __u64 blocknr,
-                              sector_t pblocknr, struct buffer_head **pbh,
-                              int newblk)
+                              sector_t pblocknr, struct buffer_head **pbh)
 {
         struct buffer_head *bh;
         struct inode *inode = NILFS_BTNC_I(btnc);
@@ -81,19 +107,6 @@ int nilfs_btnode_submit_block(struct address_space *btnc, __u64 blocknr,
                 return -ENOMEM;
 
         err = -EEXIST; /* internal code */
-        if (newblk) {
-                if (unlikely(buffer_mapped(bh) || buffer_uptodate(bh) ||
-                             buffer_dirty(bh))) {
-                        brelse(bh);
-                        BUG();
-                }
-                memset(bh->b_data, 0, 1 << inode->i_blkbits);
-                bh->b_bdev = NILFS_I_NILFS(inode)->ns_bdev;
-                bh->b_blocknr = blocknr;
-                set_buffer_mapped(bh);
-                set_buffer_uptodate(bh);
-                goto found;
-        }
 
         if (buffer_uptodate(bh) || buffer_dirty(bh))
                 goto found;
@@ -135,27 +148,6 @@ out_locked:
         return err;
 }
 
-int nilfs_btnode_get(struct address_space *btnc, __u64 blocknr,
-                     sector_t pblocknr, struct buffer_head **pbh, int newblk)
-{
-        struct buffer_head *bh;
-        int err;
-
-        err = nilfs_btnode_submit_block(btnc, blocknr, pblocknr, pbh, newblk);
-        if (err == -EEXIST) /* internal code (cache hit) */
-                return 0;
-        if (unlikely(err))
-                return err;
-
-        bh = *pbh;
-        wait_on_buffer(bh);
-        if (!buffer_uptodate(bh)) {
-                brelse(bh);
-                return -EIO;
-        }
-        return 0;
-}
-
 /**
  * nilfs_btnode_delete - delete B-tree node buffer
  * @bh: buffer to be deleted
@@ -244,12 +236,13 @@ retry:
                 unlock_page(obh->b_page);
         }
 
-        err = nilfs_btnode_get(btnc, newkey, 0, &nbh, 1);
-        if (likely(!err)) {
-                BUG_ON(nbh == obh);
-                ctxt->newbh = nbh;
-        }
-        return err;
+        nbh = nilfs_btnode_create_block(btnc, newkey);
+        if (!nbh)
+                return -ENOMEM;
+
+        BUG_ON(nbh == obh);
+        ctxt->newbh = nbh;
+        return 0;
 
  failed_unlock:
         unlock_page(obh->b_page);