[PATCH] Fix ppc system restart properly

We're actually much better off resetting system call restart at signal
return.

This makes all other resets unnecessary.

Here's the ppc version of it.

arch/ppc/kernel/signal.c

@@ -418,6 +418,9 @@ int sys_rt_sigreturn(int r3, int r4, int r5, int r6, int r7, int r8,
 {
 	struct rt_sigframe __user *rt_sf;
 
+	/* Always make any pending restarted system calls return -EINTR */
+	current_thread_info()->restart_block.fn = do_no_restart_syscall;
+
 	rt_sf = (struct rt_sigframe __user *)
 		(regs->gpr[1] + __SIGNAL_FRAMESIZE + 16);
 	if (verify_area(VERIFY_READ, rt_sf, sizeof(struct rt_sigframe)))
@@ -513,6 +516,9 @@ int sys_sigreturn(int r3, int r4, int r5, int r6, int r7, int r8,
 	struct mcontext __user *sr;
 	sigset_t set;
 
+	/* Always make any pending restarted system calls return -EINTR */
+	current_thread_info()->restart_block.fn = do_no_restart_syscall;
+
 	sc = (struct sigcontext __user *)(regs->gpr[1] + __SIGNAL_FRAMESIZE);
 	if (copy_from_user(&sigctx, sc, sizeof(sigctx)))
 		goto badframe;
@@ -583,9 +589,6 @@ int do_signal(sigset_t *oldset, struct pt_regs *regs)
 	if (signr == 0)
 		return 0;		/* no signals delivered */
 
-	/* Always make any pending restarted system calls return -EINTR */
-	current_thread_info()->restart_block.fn = do_no_restart_syscall;
-
 	if ((ka->sa.sa_flags & SA_ONSTACK) && current->sas_ss_size
 	    && !on_sig_stack(regs->gpr[1]))
 		newsp = current->sas_ss_sp + current->sas_ss_size;