Home » Mailing list archives » linux-kernel » 2007 » October » 9

[PATCH] powerpc: don't enable cpu hotplug on mpic-based pseries

!MAILaRCHIVE_VOTE_RePLACE
Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]
[view in full thread]
From: Olof Johansson <olof@...>
To: Linus Torvalds <torvalds@...>
Cc: Thomas Gleixner <tglx@...>, Greg KH <greg@...>, Greg KH <gregkh@...>, <linux-kernel@...>, Chris Wedgwood <reviews@...>, <stable@...>, <linuxppc-dev@...>, <paulus@...>, <tgall.foo@...>
Subject: [PATCH] powerpc: don't enable cpu hotplug on mpic-based pseries
Date: Tuesday, October 9, 2007 - 8:08 pm

Don't allow cpu hotplug on systems lacking XICS interrupt controller,
since current platform code is hardcoded for it.


Signed-off-by: Olof Johansson <olof@lixom.net>


diff --git a/arch/powerpc/platforms/pseries/hotplug-cpu.c b/arch/powerpc/platforms/pseries/hotplug-cpu.c
index 9711eb0..e29b890 100644
--- a/arch/powerpc/platforms/pseries/hotplug-cpu.c
+++ b/arch/powerpc/platforms/pseries/hotplug-cpu.c
@@ -252,6 +252,19 @@ static struct notifier_block pseries_smp_nb = {
 
 static int __init pseries_cpu_hotplug_init(void)
 {
+	struct device_node *np;
+	const char *typep;
+
+	for (np = NULL; (np = of_find_node_by_name(np,
+						   "interrupt-controller"));) {
+		typep = of_get_property(np, "compatible", NULL);
+		if (strstr(typep, "open-pic")) {
+			printk(KERN_INFO "CPU Hotplug not supported on "
+				"systems using MPIC\n");
+			return 0;
+		}
+	}
+
 	rtas_stop_self_args.token = rtas_token("stop-self");
 	qcss_tok = rtas_token("query-cpu-stopped-state");
 
-
Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]
Messages in current thread:
[patch 00/12] 2.6.22.10 -stable review, Greg KH, (Mon Oct 8, 2:05 pm)
Re: [patch 00/12] 2.6.22.10 -stable review, Greg KH, (Mon Oct 8, 2:09 pm)
[patch 12/12] i386: Use global flag to disable broken local ..., Greg KH, (Mon Oct 8, 2:06 pm)
[patch 11/12] SELinux: clear parent death signal on SID tran..., Greg KH, (Mon Oct 8, 2:06 pm)
[patch 10/12] Fix timer_stats printout of events/sec, Greg KH, (Mon Oct 8, 2:06 pm)
[patch 09/12] Fix SMP poweroff hangs, Greg KH, (Mon Oct 8, 2:06 pm)
Re: [patch 09/12] Fix SMP poweroff hangs, Olof Johansson, (Tue Oct 9, 11:17 am)
Re: [stable] [patch 09/12] Fix SMP poweroff hangs, Greg KH, (Tue Oct 9, 6:20 pm)
Re: [stable] [patch 09/12] Fix SMP poweroff hangs, Thomas Gleixner, (Tue Oct 9, 7:21 pm)
Re: [stable] [patch 09/12] Fix SMP poweroff hangs, Greg KH, (Tue Oct 9, 7:28 pm)
Re: [stable] [patch 09/12] Fix SMP poweroff hangs, Linus Torvalds, (Tue Oct 9, 7:27 pm)
Re: [stable] [patch 09/12] Fix SMP poweroff hangs, Paul Mackerras, (Wed Oct 10, 8:24 pm)
[PATCH] powerpc: don't enable cpu hotplug on mpic-based pser..., Olof Johansson, (Tue Oct 9, 8:08 pm)
Re: [PATCH] powerpc: don't enable cpu hotplug on mpic-based ..., Stephen Rothwell, (Tue Oct 9, 8:18 pm)
[PATCH v2] powerpc: don't enable cpu hotplug on mpic-based p..., Olof Johansson, (Tue Oct 9, 8:38 pm)
Re: [PATCH v2] powerpc: don't enable cpu hotplug on mpic-bas..., Paul Mackerras, (Thu Oct 11, 1:52 am)
Re: [PATCH v2] powerpc: don't enable cpu hotplug on mpic-bas..., Olof Johansson, (Thu Oct 11, 1:59 am)
Re: [PATCH v2] powerpc: don't enable cpu hotplug on mpic-bas..., Milton Miller, (Wed Oct 10, 6:08 am)
Re: [PATCH v2] powerpc: don't enable cpu hotplug on mpic-bas..., Olof Johansson, (Wed Oct 10, 12:43 pm)
Re: [stable] [patch 09/12] Fix SMP poweroff hangs, Olof Johansson, (Tue Oct 9, 8:03 pm)
Re: [stable] [patch 09/12] Fix SMP poweroff hangs, Thomas Gleixner, (Tue Oct 9, 7:35 pm)
Re: [stable] [patch 09/12] Fix SMP poweroff hangs, Linus Torvalds, (Wed Oct 10, 1:29 am)
[patch 08/12] NLM: Fix a circular lock dependency in lockd, Greg KH, (Mon Oct 8, 2:06 pm)
Re: [patch 08/12] NLM: Fix a circular lock dependency in lockd, Roel Kluin, (Mon Oct 8, 4:01 pm)
Re: [patch 08/12] NLM: Fix a circular lock dependency in lockd, Trond Myklebust, (Tue Oct 9, 11:00 am)
Re: [patch 08/12] NLM: Fix a circular lock dependency in lockd, Greg KH, (Tue Oct 9, 11:13 am)
Re: [patch 08/12] NLM: Fix a circular lock dependency in lockd, Trond Myklebust, (Tue Oct 9, 11:27 am)
Re: [stable] [patch 08/12] NLM: Fix a circular lock dependen..., Greg KH, (Tue Oct 9, 4:41 pm)
[patch 07/12] i2c-algo-bit: Read block data bugfix, Greg KH, (Mon Oct 8, 2:06 pm)
[patch 06/12] Fix ppp_mppe kernel stack usage., Greg KH, (Mon Oct 8, 2:06 pm)
[patch 05/12] libata: update drive blacklists, Greg KH, (Mon Oct 8, 2:06 pm)
[patch 04/12] sky2: fix transmit state on resume, Greg KH, (Mon Oct 8, 2:06 pm)
[patch 03/12] sky2: fix VLAN receive processing, Greg KH, (Mon Oct 8, 2:06 pm)
[patch 02/12] sky2: reduce impact of watchdog timer, Greg KH, (Mon Oct 8, 2:06 pm)
[patch 01/12] scsi_transport_spi: fix domain validation fail..., Greg KH, (Mon Oct 8, 2:06 pm)