fs: unexport __vfs_read/__vfs_write

No modular users left, and any new ones should use kernel_read/write
or iov_iter variants instead.

Signed-off-by: Christoph Hellwig <[e-mail]>
Signed-off-by: Al Viro <[e-mail]>

fs/read_write.c

···
 	else
 		return -EINVAL;
 }
-EXPORT_SYMBOL(__vfs_read);
 
 ssize_t kernel_read(struct file *file, void *buf, size_t count, loff_t *pos)
 {
···
 	else
 		return -EINVAL;
 }
-EXPORT_SYMBOL(__vfs_write);
 
 ssize_t __kernel_write(struct file *file, const void *buf, size_t count, loff_t *pos)
 {

include/linux/fs.h

···
 			      struct iovec **ret_pointer);
 
 extern ssize_t __vfs_read(struct file *, char __user *, size_t, loff_t *);
-extern ssize_t __vfs_write(struct file *, const char __user *, size_t, loff_t *);
 extern ssize_t vfs_read(struct file *, char __user *, size_t, loff_t *);
 extern ssize_t vfs_write(struct file *, const char __user *, size_t, loff_t *);
 extern ssize_t vfs_readv(struct file *, const struct iovec __user *,