Messages in this thread Patch in this message | | | Date | Wed, 16 May 2012 00:09:47 +0530 | From | "Srivatsa S. Bhat" <> | Subject | Re: Linux 3.4-rc7 |
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On 05/15/2012 11:59 PM, Srivatsa S. Bhat wrote:
> On 05/15/2012 10:54 PM, Linus Torvalds wrote: > >> On Sun, May 13, 2012 at 5:42 PM, John David Anglin <dave.anglin@bell.net> wrote: >>> >>> I successfully booted 3.4-rc7 with this change on rp3440 (4 cpu smp). My >>> build also >>> included cache and other fixes that are being discussed on the parisc list. >> >> Can somebody send the final patches with proper subject lines etc, >> instead of hiding them in unrelated threads? I hate picking up patches >> that I don't personally know from the middle of some random thread. >> > > > Okay, here they are: >
This one is for mn10300:
--- From: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> Subject: [PATCH] mn10300/CPU hotplug: Add missing call to notify_cpu_starting()
The scheduler depends on receiving the CPU_STARTING notification, without which we end up into a lot of trouble. So add the missing call to notify_cpu_starting() in the bringup code.
Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> ---
arch/mn10300/kernel/smp.c | 9 ++++++--- 1 files changed, 6 insertions(+), 3 deletions(-)
diff --git a/arch/mn10300/kernel/smp.c b/arch/mn10300/kernel/smp.c index 910dddf..9cd69ad 100644 --- a/arch/mn10300/kernel/smp.c +++ b/arch/mn10300/kernel/smp.c @@ -24,6 +24,7 @@ #include <linux/sched.h> #include <linux/profile.h> #include <linux/smp.h> +#include <linux/cpu.h> #include <asm/tlbflush.h> #include <asm/bitops.h> #include <asm/processor.h> @@ -38,7 +39,6 @@ #include "internal.h" #ifdef CONFIG_HOTPLUG_CPU -#include <linux/cpu.h> #include <asm/cacheflush.h> static unsigned long sleep_mode[NR_CPUS]; @@ -874,10 +874,13 @@ static void __init smp_online(void) cpu = smp_processor_id(); - local_irq_enable(); + notify_cpu_starting(cpu); + ipi_call_lock(); set_cpu_online(cpu, true); - smp_wmb(); + ipi_call_unlock(); + + local_irq_enable(); } /**
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