[MIPS] Make do_signal return void.

It's return value is ignored everywhere.
    
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

---

arch/mips/kernel/process.c

@@ -4,6 +4,7 @@
  * for more details.
  *
  * Copyright (C) 1994 - 1999, 2000 by Ralf Baechle and others.
+ * Copyright (C) 2005, 2006 by Ralf Baechle (ralf@linux-mips.org)
  * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
  * Copyright (C) 2004 Thiemo Seufer
  */
@@ -58,8 +59,8 @@ ATTRIB_NORET void cpu_idle(void)
 	}
 }
 
-extern int do_signal(struct pt_regs *regs);
-extern int do_signal32(struct pt_regs *regs);
+extern void do_signal(struct pt_regs *regs);
+extern void do_signal32(struct pt_regs *regs);
 
 /*
  * Native o32 and N64 ABI without DSP ASE

arch/mips/kernel/signal.c

@@ -410,7 +410,7 @@ static inline int handle_signal(unsigned long sig, siginfo_t *info,
 	return ret;
 }
 
-int do_signal(struct pt_regs *regs)
+void do_signal(struct pt_regs *regs)
 {
 	struct k_sigaction ka;
 	sigset_t *oldset;
@@ -423,7 +423,7 @@ int do_signal(struct pt_regs *regs)
 	 * if so.
 	 */
 	if (!user_mode(regs))
-		return 1;
+		return;
 
 	if (try_to_freeze())
 		goto no_signal;
@@ -477,8 +477,6 @@ no_signal:
 		clear_thread_flag(TIF_RESTORE_SIGMASK);
 		sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
 	}
-
-	return 0;
 }
 
 /*

include/asm-mips/abi.h

@@ -13,7 +13,7 @@
 #include <asm/siginfo.h>
 
 struct mips_abi {
-	int (* const do_signal)(struct pt_regs *regs);
+	void (* const do_signal)(struct pt_regs *regs);
 	int (* const setup_frame)(struct k_sigaction * ka,
 	                          struct pt_regs *regs, int signr,
 	                          sigset_t *set);