linux-kernel - [RFC PATCH 03/16] parisc: support poweroff through poweroff handler call chain

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Date:	Tue, 30 Sep 2014 11:00:43 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	linux-kernel@...r.kernel.org
Cc:	linux-pm@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-c6x-dev@...ux-c6x.org, linux-ia64@...r.kernel.org,
	linux-metag@...r.kernel.org, linux-mips@...ux-mips.org,
	linux-parisc@...r.kernel.org, linux-sh@...r.kernel.org,
	xen-devel@...ts.xenproject.org, Guenter Roeck <linux@...ck-us.net>,
	"James E.J. Bottomley" <jejb@...isc-linux.org>,
	Helge Deller <deller@....de>
Subject: [RFC PATCH 03/16] parisc: support poweroff through poweroff handler call chain

The kernel core now supports a poweroff handler call chain
to remove power from the system. Call it from machine_power_off.

Also, do not use pm_power_off as alternate pointer to machine_power_off.
Have the parisc/power driver call kernel_power_off() which in turn will
call machine_power_off().

Cc: James E.J. Bottomley <jejb@...isc-linux.org>
Cc: Helge Deller <deller@....de>
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
---
 arch/parisc/kernel/process.c | 7 +++++--
 drivers/parisc/power.c       | 3 +--
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/arch/parisc/kernel/process.c b/arch/parisc/kernel/process.c
index 0bbbf0d..21d1ab3 100644
--- a/arch/parisc/kernel/process.c
+++ b/arch/parisc/kernel/process.c
@@ -42,6 +42,7 @@
 #include <linux/module.h>
 #include <linux/personality.h>
 #include <linux/ptrace.h>
+#include <linux/reboot.h>
 #include <linux/sched.h>
 #include <linux/slab.h>
 #include <linux/stddef.h>
@@ -133,7 +134,9 @@ void machine_power_off(void)
 	pdc_soft_power_button(0);
 	
 	pdc_chassis_send_status(PDC_CHASSIS_DIRECT_SHUTDOWN);
-		
+
+	do_kernel_poweroff();
+
 	/* It seems we have no way to power the system off via
 	 * software. The user has to press the button himself. */
 
@@ -141,7 +144,7 @@ void machine_power_off(void)
 	       "Please power this system off now.");
 }
 
-void (*pm_power_off)(void) = machine_power_off;
+void (*pm_power_off)(void);
 EXPORT_SYMBOL(pm_power_off);
 
 /*
diff --git a/drivers/parisc/power.c b/drivers/parisc/power.c
index 90cca5e..de5b2ff 100644
--- a/drivers/parisc/power.c
+++ b/drivers/parisc/power.c
@@ -95,8 +95,7 @@ static void process_shutdown(void)
 		/* send kill signal */
 		if (kill_cad_pid(SIGINT, 1)) {
 			/* just in case killing init process failed */
-			if (pm_power_off)
-				pm_power_off();
+			kernel_power_off();
 		}
 	}
 }
-- 
1.9.1

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