make ramfs_fill_super() static

all users should just call ramfs_mount()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/ramfs/inode.c

@@ -217,7 +217,7 @@ static int ramfs_parse_options(char *data, struct ramfs_mount_opts *opts)
 	return 0;
 }
 
-int ramfs_fill_super(struct super_block *sb, void *data, int silent)
+static int ramfs_fill_super(struct super_block *sb, void *data, int silent)
 {
 	struct ramfs_fs_info *fsi;
 	struct inode *inode;

include/linux/ramfs.h

@@ -20,6 +20,4 @@ extern int ramfs_nommu_expand_for_mapping(struct inode *inode, size_t newsize);
 extern const struct file_operations ramfs_file_operations;
 extern const struct vm_operations_struct generic_file_vm_ops;
 
-int ramfs_fill_super(struct super_block *sb, void *data, int silent);
-
 #endif

init/do_mounts.c

@@ -630,12 +630,10 @@ static bool is_tmpfs;
 static struct dentry *rootfs_mount(struct file_system_type *fs_type,
 	int flags, const char *dev_name, void *data)
 {
-	void *fill = ramfs_fill_super;
-
 	if (IS_ENABLED(CONFIG_TMPFS) && is_tmpfs)
-		fill = shmem_fill_super;
+		return mount_nodev(fs_type, flags, data, shmem_fill_super);
 
-	return mount_nodev(fs_type, flags, data, fill);
+	return ramfs_mount(fs_type, flags, dev_name, data);
 }
 
 struct file_system_type rootfs_fs_type = {