linux-kernel - [PATCH v2 1/3] ARM: Add irq disabled version of soft

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Date:	Mon, 24 Feb 2014 16:27:37 -0800
From:	Sebastian Capella <sebastian.capella@...aro.org>
To:	linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
	linaro-kernel@...ts.linaro.org,
	linux-arm-kernel@...ts.infradead.org
Cc:	Russ Dill <Russ.Dill@...com>,
	Sebastian Capella <sebastian.capella@...aro.org>,
	Russell King <linux@....linux.org.uk>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Will Deacon <will.deacon@....com>,
	Robin Holt <robin.m.holt@...il.com>
Subject: [PATCH v2 1/3] ARM: Add irq disabled version of soft_restart.

From: Russ Dill <Russ.Dill@...com>

This adds the ability to run soft_restart with local_irq/fiq_disable
already called. This is helpful for the hibernation code paths.

Signed-off-by: Russ Dill <Russ.Dill@...com>
Signed-off-by: Sebastian Capella <sebastian.capella@...aro.org>
Cc: Russell King <linux@....linux.org.uk>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Will Deacon <will.deacon@....com>
Cc: Robin Holt <robin.m.holt@...il.com>
---
 arch/arm/include/asm/system_misc.h |    1 +
 arch/arm/kernel/process.c          |   15 ++++++++++-----
 2 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/arch/arm/include/asm/system_misc.h b/arch/arm/include/asm/system_misc.h
index a3d61ad..eca8dd4 100644
--- a/arch/arm/include/asm/system_misc.h
+++ b/arch/arm/include/asm/system_misc.h
@@ -10,6 +10,7 @@
 
 extern void cpu_init(void);
 
+void soft_restart_noirq(unsigned long);
 void soft_restart(unsigned long);
 extern void (*arm_pm_restart)(enum reboot_mode reboot_mode, const char *cmd);
 extern void (*arm_pm_idle)(void);
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index 92f7b15..685bc4a 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -95,14 +95,10 @@ static void __soft_restart(void *addr)
 	BUG();
 }
 
-void soft_restart(unsigned long addr)
+void soft_restart_noirq(unsigned long addr)
 {
 	u64 *stack = soft_restart_stack + ARRAY_SIZE(soft_restart_stack);
 
-	/* Disable interrupts first */
-	local_irq_disable();
-	local_fiq_disable();
-
 	/* Disable the L2 if we're the last man standing. */
 	if (num_online_cpus() == 1)
 		outer_disable();
@@ -114,6 +110,15 @@ void soft_restart(unsigned long addr)
 	BUG();
 }
 
+void soft_restart(unsigned long addr)
+{
+	/* Disable interrupts first */
+	local_irq_disable();
+	local_fiq_disable();
+
+	soft_restart_noirq(addr);
+}
+
 static void null_restart(enum reboot_mode reboot_mode, const char *cmd)
 {
 }
-- 
1.7.9.5

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