Revert "exfat: free the sbi and iocharset in ->kill_sb"

This reverts commit 8269c2d7f032cdc59295a14d3418bda40be7c573.

Log:
../fs/exfat/super.c:1115:9: error: implicit declaration of function 'exfat_free_sbi'; did you mean 'exfat_free_inode'? [-Werror=implicit-function-declaration]
 1115 |         exfat_free_sbi(sbi);
      |         ^~~~~~~~~~~~~~
      |         exfat_free_inode

Signed-off-by: TogoFire <togofire@mailfence.com>
Change-Id: Ie7ad65ed921b1a4fdc02f2d138e9f8c0df18f3dc

fs/exfat/super.c

@@ -45,7 +45,9 @@ static void exfat_put_super(struct super_block *sb)
 	mutex_unlock(&sbi->s_lock);
 
 	unload_nls(sbi->nls_io);
+	exfat_free_iocharset(sbi);
 	exfat_free_upcase_table(sbi);
+	kfree(sbi);
 }
 
 static int exfat_sync_fs(struct super_block *sb, int wait)
@@ -739,6 +741,9 @@ static int exfat_fill_super(struct super_block *sb, struct fs_context *fc)
 
 check_nls_io:
 	unload_nls(sbi->nls_io);
+	exfat_free_iocharset(sbi);
+	sb->s_fs_info = NULL;
+	kfree(sbi);
 	return err;
 }
 
@@ -747,18 +752,14 @@ static int exfat_get_tree(struct fs_context *fc)
 	return get_tree_bdev(fc, exfat_fill_super);
 }
 
-static void exfat_free_sbi(struct exfat_sb_info *sbi)
-{
-	exfat_free_iocharset(sbi);
-	kfree(sbi);
-}
-
 static void exfat_free(struct fs_context *fc)
 {
 	struct exfat_sb_info *sbi = fc->s_fs_info;
 
-	if (sbi)
-		exfat_free_sbi(sbi);
+	if (sbi) {
+		exfat_free_iocharset(sbi);
+		kfree(sbi);
+	}
 }
 
 static int exfat_reconfigure(struct fs_context *fc)
@@ -803,21 +804,12 @@ static int exfat_init_fs_context(struct fs_context *fc)
 	return 0;
 }
 
-static void exfat_kill_sb(struct super_block *sb)
-{
-	struct exfat_sb_info *sbi = sb->s_fs_info;
-
-	kill_block_super(sb);
-	if (sbi)
-		exfat_free_sbi(sbi);
-}
-
 static struct file_system_type exfat_fs_type = {
 	.owner			= THIS_MODULE,
 	.name			= "exfat",
 	.init_fs_context	= exfat_init_fs_context,
 	.parameters		= exfat_parameters,
-	.kill_sb		= exfat_kill_sb,
+	.kill_sb		= kill_block_super,
 	.fs_flags		= FS_REQUIRES_DEV,
 };