make shmem_fill_super() static

... have callers use shmem_mount()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

drivers/base/devtmpfs.c

@@ -71,7 +71,7 @@ static struct dentry *dev_mount(struct file_system_type *fs_type, int flags,
 		      const char *dev_name, void *data)
 {
 #ifdef CONFIG_TMPFS
-	return mount_nodev(fs_type, flags, data, shmem_fill_super);
+	return shmem_mount(fs_type, flags, dev_name, data);
 #else
 	return ramfs_mount(fs_type, flags, dev_name, data);
 #endif

include/linux/shmem_fs.h

@@ -50,7 +50,8 @@ static inline struct shmem_inode_info *SHMEM_I(struct inode *inode)
  * Functions in mm/shmem.c called directly from elsewhere:
  */
 extern int shmem_init(void);
-extern int shmem_fill_super(struct super_block *sb, void *data, int silent);
+extern struct dentry *shmem_mount(struct file_system_type *fs_type,
+	int flags, const char *dev_name, void *data);
 extern struct file *shmem_file_setup(const char *name,
 					loff_t size, unsigned long flags);
 extern struct file *shmem_kernel_file_setup(const char *name, loff_t size,

init/do_mounts.c

@@ -631,7 +631,7 @@ static struct dentry *rootfs_mount(struct file_system_type *fs_type,
 	int flags, const char *dev_name, void *data)
 {
 	if (IS_ENABLED(CONFIG_TMPFS) && is_tmpfs)
-		return mount_nodev(fs_type, flags, data, shmem_fill_super);
+		return shmem_mount(fs_type, flags, dev_name, data);
 
 	return ramfs_mount(fs_type, flags, dev_name, data);
 }

mm/shmem.c

@@ -3547,7 +3547,7 @@ static void shmem_put_super(struct super_block *sb)
 	sb->s_fs_info = NULL;
 }
 
-int shmem_fill_super(struct super_block *sb, void *data, int silent)
+static int shmem_fill_super(struct super_block *sb, void *data, int silent)
 {
 	struct inode *inode;
 	struct shmem_sb_info *sbinfo;
@@ -3759,7 +3759,7 @@ static const struct vm_operations_struct shmem_vm_ops = {
 #endif
 };
 
-static struct dentry *shmem_mount(struct file_system_type *fs_type,
+struct dentry *shmem_mount(struct file_system_type *fs_type,
 	int flags, const char *dev_name, void *data)
 {
 	return mount_nodev(fs_type, flags, data, shmem_fill_super);