mn10300: ->restart_block.fn needs to be reset on sigreturn

Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

arch/mn10300/kernel/signal.c

@@ -102,6 +102,9 @@ static int restore_sigcontext(struct pt_regs *regs,
 {
 	unsigned int err = 0;
 
+	/* Always make any pending restarted system calls return -EINTR */
+	current_thread_info()->restart_block.fn = do_no_restart_syscall;
+
 	if (is_using_fpu(current))
 		fpu_kill_state(current);