linux-kernel - [PATCH 25/27] s390, smpboot: Use generic SMP booting infrastructure

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Message-ID: <20120601091604.31979.71351.stgit@srivatsabhat.in.ibm.com>
Date:	Fri, 01 Jun 2012 14:46:09 +0530
From:	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>
To:	tglx@...utronix.de, peterz@...radead.org,
	paulmck@...ux.vnet.ibm.com
Cc:	rusty@...tcorp.com.au, mingo@...nel.org, yong.zhang0@...il.com,
	akpm@...ux-foundation.org, vatsa@...ux.vnet.ibm.com, rjw@...k.pl,
	linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
	srivatsa.bhat@...ux.vnet.ibm.com, nikunj@...ux.vnet.ibm.com,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	linux390@...ibm.com (supporter:S390),
	Michael Holzheu <holzheu@...ux.vnet.ibm.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Jan Glauber <jang@...ux.vnet.ibm.com>,
	linux-s390@...r.kernel.org
Subject: [PATCH 25/27] s390, smpboot: Use generic SMP booting infrastructure

Convert s390 to use the generic framework to boot secondary CPUs.

Cc: Martin Schwidefsky <schwidefsky@...ibm.com>
Cc: Heiko Carstens <heiko.carstens@...ibm.com>
Cc: linux390@...ibm.com (supporter:S390)
Cc: Michael Holzheu <holzheu@...ux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Jan Glauber <jang@...ux.vnet.ibm.com>
Cc: linux-s390@...r.kernel.org
Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@...ux.vnet.ibm.com>
---

 arch/s390/kernel/smp.c |   12 ++++++------
 1 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 14c8a08..3eb12e6 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -29,6 +29,7 @@
 #include <linux/interrupt.h>
 #include <linux/irqflags.h>
 #include <linux/cpu.h>
+#include <linux/smpboot.h>
 #include <linux/slab.h>
 #include <linux/crash_dump.h>
 #include <asm/asm-offsets.h>
@@ -702,6 +703,11 @@ static void __init smp_detect_cpus(void)
  */
 static void __cpuinit smp_start_secondary(void *cpuvoid)
 {
+	smpboot_start_secondary(cpuvoid);
+}
+
+void __cpuinit __cpu_pre_starting(void *unused)
+{
 	S390_lowcore.last_update_clock = get_clock();
 	S390_lowcore.restart_stack = (unsigned long) restart_stack;
 	S390_lowcore.restart_fn = (unsigned long) do_restart;
@@ -711,15 +717,9 @@ static void __cpuinit smp_start_secondary(void *cpuvoid)
 	__ctl_load(S390_lowcore.cregs_save_area, 0, 15);
 	__load_psw_mask(psw_kernel_bits | PSW_MASK_DAT);
 	cpu_init();
-	preempt_disable();
 	init_cpu_timer();
 	init_cpu_vtimer();
 	pfault_init();
-	notify_cpu_starting(smp_processor_id());
-	set_cpu_online(smp_processor_id(), true);
-	local_irq_enable();
-	/* cpu_idle will call schedule for us */
-	cpu_idle();
 }
 
 /* Upping and downing of CPUs */

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