[PATCH RT 2/4] sh: enable interrupts in signal handling

[Katsuya Matsubara <matsu@igel.co.jp>]

Fully-preemptible kernel does not need interrupts disabled in signal
handling. The same treatment can be found in x86 and arm code.

Signed-off-by: Katsuya Matsubara <matsu@igel.co.jp>
---
 arch/sh/kernel/signal_32.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/arch/sh/kernel/signal_32.c b/arch/sh/kernel/signal_32.c
index 6d6e408..9f633b5 100644
--- a/arch/sh/kernel/signal_32.c
+++ b/arch/sh/kernel/signal_32.c
@@ -571,6 +571,13 @@ static void do_signal(struct pt_regs *regs, unsigned int save_r0)
 	struct k_sigaction ka;
 	sigset_t *oldset;
 
+#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
-- 
1.6.1