file: Rename __close_fd_get_file close_fd_get_file

The function close_fd_get_file is explicitly a variant of
__close_fd[1].  Now that __close_fd has been renamed close_fd, rename
close_fd_get_file to be consistent with close_fd.

When __alloc_fd, __close_fd and __fd_install were introduced the
double underscore indicated that the function took a struct
files_struct parameter.  The function __close_fd_get_file never has so
the naming has always been inconsistent.  This just cleans things up
so there are not any lingering mentions or references __close_fd left
in the code.

[1] 80cd795630d6 ("binder: fix use-after-free due to ksys_close() during fdget()")
Link: https://lkml.kernel.org/r/20201120231441.29911-23-ebiederm@xmission.com
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
diff --git a/fs/io_uring.c b/fs/io_uring.c
index b42dfa0..2e6e512 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -4206,7 +4206,7 @@ static int io_close(struct io_kiocb *req, bool force_nonblock,
 
 	/* might be already done during nonblock submission */
 	if (!close->put_file) {
-		ret = __close_fd_get_file(close->fd, &close->put_file);
+		ret = close_fd_get_file(close->fd, &close->put_file);
 		if (ret < 0)
 			return (ret == -ENOENT) ? -EBADF : ret;
 	}