nilfs2: convert nilfs_bmap_lookup to an inline function

The nilfs_bmap_lookup() is now a wrapper function of
nilfs_bmap_lookup_at_level().

This moves the nilfs_bmap_lookup() to a header file converting it to
an inline function and gives an opportunity for optimization.

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

3 files changed, 28 insertions, 36 deletions

diff --git a/fs/nilfs2/bmap.c b/fs/nilfs2/bmap.c
index f98c5c4cf6e7..08834df6ec68 100644
--- a/fs/nilfs2/bmap.c
+++ b/fs/nilfs2/bmap.c
@@ -36,6 +36,26 @@ struct inode *nilfs_bmap_get_dat(const struct nilfs_bmap *bmap)
         return nilfs_dat_inode(NILFS_I_NILFS(bmap->b_inode));
 }
 
+/**
+ * nilfs_bmap_lookup_at_level - find a data block or node block
+ * @bmap: bmap
+ * @key: key
+ * @level: level
+ * @ptrp: place to store the value associated to @key
+ *
+ * Description: nilfs_bmap_lookup_at_level() finds a record whose key
+ * matches @key in the block at @level of the bmap.
+ *
+ * Return Value: On success, 0 is returned and the record associated with @key
+ * is stored in the place pointed by @ptrp. On error, one of the following
+ * negative error codes is returned.
+ *
+ * %-EIO - I/O error.
+ *
+ * %-ENOMEM - Insufficient amount of memory available.
+ *
+ * %-ENOENT - A record associated with @key does not exist.
+ */
 int nilfs_bmap_lookup_at_level(struct nilfs_bmap *bmap, __u64 key, int level,
                                __u64 *ptrp)
 {
@@ -69,39 +89,6 @@ int nilfs_bmap_lookup_contig(struct nilfs_bmap *bmap, __u64 key, __u64 *ptrp,
         return ret;
 }
 
-/**
- * nilfs_bmap_lookup - find a record
- * @bmap: bmap
- * @key: key
- * @recp: pointer to record
- *
- * Description: nilfs_bmap_lookup() finds a record whose key matches @key in
- * @bmap.
- *
- * Return Value: On success, 0 is returned and the record associated with @key
- * is stored in the place pointed by @recp. On error, one of the following
- * negative error codes is returned.
- *
- * %-EIO - I/O error.
- *
- * %-ENOMEM - Insufficient amount of memory available.
- *
- * %-ENOENT - A record associated with @key does not exist.
- */
-int nilfs_bmap_lookup(struct nilfs_bmap *bmap,
-                      unsigned long key,
-                      unsigned long *recp)
-{
-        __u64 ptr;
-        int ret;
-
-        /* XXX: use macro for level 1 */
-        ret = nilfs_bmap_lookup_at_level(bmap, key, 1, &ptr);
-        if (recp != NULL)
-                *recp = ptr;
-        return ret;
-}
-
 static int nilfs_bmap_do_insert(struct nilfs_bmap *bmap, __u64 key, __u64 ptr)
 {
         __u64 keys[NILFS_BMAP_SMALL_HIGH + 1];
diff --git a/fs/nilfs2/bmap.h b/fs/nilfs2/bmap.h
index a4f64e54424c..9980d7dbab91 100644
--- a/fs/nilfs2/bmap.h
+++ b/fs/nilfs2/bmap.h
@@ -142,7 +142,6 @@ struct nilfs_bmap {
 int nilfs_bmap_test_and_clear_dirty(struct nilfs_bmap *);
 int nilfs_bmap_read(struct nilfs_bmap *, struct nilfs_inode *);
 void nilfs_bmap_write(struct nilfs_bmap *, struct nilfs_inode *);
-int nilfs_bmap_lookup(struct nilfs_bmap *, unsigned long, unsigned long *);
 int nilfs_bmap_lookup_contig(struct nilfs_bmap *, __u64, __u64 *, unsigned);
 int nilfs_bmap_insert(struct nilfs_bmap *, unsigned long, unsigned long);
 int nilfs_bmap_delete(struct nilfs_bmap *, unsigned long);
@@ -161,6 +160,12 @@ void nilfs_bmap_init_gcdat(struct nilfs_bmap *, struct nilfs_bmap *);
 void nilfs_bmap_commit_gcdat(struct nilfs_bmap *, struct nilfs_bmap *);
 
 
+static inline int nilfs_bmap_lookup(struct nilfs_bmap *bmap, __u64 key,
+                                    __u64 *ptr)
+{
+        return nilfs_bmap_lookup_at_level(bmap, key, 1, ptr);
+}
+
 /*
  * Internal use only
  */
diff --git a/fs/nilfs2/mdt.c b/fs/nilfs2/mdt.c
index 9cb831899119..156bf6091a96 100644
--- a/fs/nilfs2/mdt.c
+++ b/fs/nilfs2/mdt.c
@@ -136,7 +136,7 @@ nilfs_mdt_submit_block(struct inode *inode, unsigned long blkoff,
                        int mode, struct buffer_head **out_bh)
 {
         struct buffer_head *bh;
-        unsigned long blknum = 0;
+        __u64 blknum = 0;
         int ret = -ENOMEM;
 
         bh = nilfs_grab_buffer(inode, inode->i_mapping, blkoff, 0);
@@ -166,7 +166,7 @@ nilfs_mdt_submit_block(struct inode *inode, unsigned long blkoff,
                 goto failed_bh;
         }
         bh->b_bdev = NILFS_MDT(inode)->mi_nilfs->ns_bdev;
-        bh->b_blocknr = blknum;
+        bh->b_blocknr = (sector_t)blknum;
         set_buffer_mapped(bh);
 
         bh->b_end_io = end_buffer_read_sync;