From aa60f24bac7c129cfc97e25319669d1a5c95400c Mon Sep 17 00:00:00 2001
From: Wu Zhangjin <wuzhangjin@gmail.com>
Date: Wed, 10 Mar 2010 01:53:58 +0800
Subject: [PATCH] RT: MIPS: check resched in do_signal()

commit aa60f24bac7c129cfc97e25319669d1a5c95400c in tip.

Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>

diff --git a/arch/mips/kernel/signal.c b/arch/mips/kernel/signal.c
index d0c68b5..2ca24d7 100644
--- a/arch/mips/kernel/signal.c
+++ b/arch/mips/kernel/signal.c
@@ -640,6 +640,14 @@ static void do_signal(struct pt_regs *regs)
 	siginfo_t info;
 	int signr;
 
+#ifdef CONFIG_PREEMPT_RT
+	/*
+	 * Fully-preemptible kernel does not need interrupts disabled
+	 */
+	local_irq_enable();
+	preempt_check_resched();
+#endif
+
 	/*
 	 * We want the common case to go fast, which is why we may in certain
 	 * cases get here from kernel mode. Just return without doing anything
-- 
1.7.1.1