fs/adfs: map: rename adfs_map_free() to adfs_map_statfs()

adfs_map_free() is not obvious whether it is freeing the map or
returning the number of free blocks on the filesystem.  Rename it to
the more generic statfs() to make it clear that it's a statistic
function.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/adfs/adfs.h

@@ -145,7 +145,7 @@ int adfs_notify_change(struct dentry *dentry, struct iattr *attr);
 
 /* map.c */
 int adfs_map_lookup(struct super_block *sb, u32 frag_id, unsigned int offset);
-extern unsigned int adfs_map_free(struct super_block *sb);
+void adfs_map_statfs(struct super_block *sb, struct kstatfs *buf);
 struct adfs_discmap *adfs_read_map(struct super_block *sb, struct adfs_discrecord *dr);
 
 /* Misc */

fs/adfs/map.c

@@ -5,6 +5,7 @@
  *  Copyright (C) 1997-2002 Russell King
  */
 #include <linux/slab.h>
+#include <linux/statfs.h>
 #include <asm/unaligned.h>
 #include "adfs.h"
 
@@ -221,10 +222,10 @@ static int scan_map(struct adfs_sb_info *asb, unsigned int zone,
  *  total_free = E(free_in_zone_n)
  *              nzones
  */
-unsigned int
-adfs_map_free(struct super_block *sb)
+void adfs_map_statfs(struct super_block *sb, struct kstatfs *buf)
 {
 	struct adfs_sb_info *asb = ADFS_SB(sb);
+	struct adfs_discrecord *dr = adfs_map_discrecord(asb->s_map);
 	struct adfs_discmap *dm;
 	unsigned int total = 0;
 	unsigned int zone;
@@ -236,7 +237,10 @@ adfs_map_free(struct super_block *sb)
 		total += scan_free_map(asb, dm++);
 	} while (--zone > 0);
 
-	return signed_asl(total, asb->s_map2blk);
+	buf->f_blocks  = adfs_disc_size(dr) >> sb->s_blocksize_bits;
+	buf->f_files   = asb->s_ids_per_zone * asb->s_map_size;
+	buf->f_bavail  =
+	buf->f_bfree   = signed_asl(total, asb->s_map2blk);
 }
 
 int adfs_map_lookup(struct super_block *sb, u32 frag_id, unsigned int offset)

fs/adfs/super.c

@@ -204,16 +204,13 @@ static int adfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
 	struct super_block *sb = dentry->d_sb;
 	struct adfs_sb_info *sbi = ADFS_SB(sb);
-	struct adfs_discrecord *dr = adfs_map_discrecord(sbi->s_map);
 	u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
 
+	adfs_map_statfs(sb, buf);
+
 	buf->f_type    = ADFS_SUPER_MAGIC;
 	buf->f_namelen = sbi->s_namelen;
 	buf->f_bsize   = sb->s_blocksize;
-	buf->f_blocks  = adfs_disc_size(dr) >> sb->s_blocksize_bits;
-	buf->f_files   = sbi->s_ids_per_zone * sbi->s_map_size;
-	buf->f_bavail  =
-	buf->f_bfree   = adfs_map_free(sb);
 	buf->f_ffree   = (long)(buf->f_bfree * buf->f_files) / (long)buf->f_blocks;
 	buf->f_fsid.val[0] = (u32)id;
 	buf->f_fsid.val[1] = (u32)(id >> 32);