Re: [Xen-devel] [PATCH 03/27] smpboot: Define and use cpu_state per-cpu variable in generic code

[David Daney <ddaney.cavm@xxxxxxxxx>]

On 06/01/2012 02:10 AM, Srivatsa S. Bhat wrote:
> The per-cpu variable cpu_state is used in x86 and also used in other
> architectures, to track the state of the cpu during bringup and hotplug.
> Pull it out into generic code.
>
> Cc: Tony Luck<tony.luck@xxxxxxxxx>
> Cc: Fenghua Yu<fenghua.yu@xxxxxxxxx>
> Cc: Ralf Baechle<ralf@xxxxxxxxxxxxxx>
> Cc: Benjamin Herrenschmidt<benh@xxxxxxxxxxxxxxxxxxx>
> Cc: Paul Mundt<lethal@xxxxxxxxxxxx>
> Cc: Chris Metcalf<cmetcalf@xxxxxxxxxx>
> Cc: Thomas Gleixner<tglx@xxxxxxxxxxxxx>
> Cc: Ingo Molnar<mingo@xxxxxxxxxx>
> Cc: "H. Peter Anvin"<hpa@xxxxxxxxx>
> Cc: x86@xxxxxxxxxx
> Cc: Konrad Rzeszutek Wilk<konrad.wilk@xxxxxxxxxx>
> Cc: Jeremy Fitzhardinge<jeremy@xxxxxxxx>
> Cc: Peter Zijlstra<a.p.zijlstra@xxxxxxxxx>
> Cc: Andrew Morton<akpm@xxxxxxxxxxxxxxxxxxxx>
> Cc: Mike Frysinger<vapier@xxxxxxxxxx>
> Cc: Yong Zhang<yong.zhang0@xxxxxxxxx>
> Cc: Venkatesh Pallipadi<venki@xxxxxxxxxx>
> Cc: Suresh Siddha<suresh.b.siddha@xxxxxxxxx>
> Cc: linux-ia64@xxxxxxxxxxxxxxx
> Cc: linux-mips@xxxxxxxxxxxxxx
> Cc: linuxppc-dev@xxxxxxxxxxxxxxxx
> Cc: linux-sh@xxxxxxxxxxxxxxx
> Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
> Cc: virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx
> Signed-off-by: Srivatsa S. Bhat<srivatsa.bhat@xxxxxxxxxxxxxxxxxx>
> ---
>
>   arch/ia64/include/asm/cpu.h   |    2 --
>   arch/ia64/kernel/process.c    |    1 +
>   arch/ia64/kernel/smpboot.c    |    6 +-----
>   arch/mips/cavium-octeon/smp.c |    4 +---
>   arch/powerpc/kernel/smp.c     |    6 +-----
>   arch/sh/include/asm/smp.h     |    2 --
>   arch/sh/kernel/smp.c          |    4 +---
>   arch/tile/kernel/smpboot.c    |    4 +---
>   arch/x86/include/asm/cpu.h    |    2 --
>   arch/x86/kernel/smpboot.c     |    4 +---
>   arch/x86/xen/smp.c            |    1 +
>   include/linux/smpboot.h       |    1 +
>   kernel/smpboot.c              |    4 ++++
>   13 files changed, 13 insertions(+), 28 deletions(-)
[...]
> diff --git a/arch/mips/cavium-octeon/smp.c b/arch/mips/cavium-octeon/smp.c
> index 97e7ce9..93cd4b0 100644
> --- a/arch/mips/cavium-octeon/smp.c
> +++ b/arch/mips/cavium-octeon/smp.c
> @@ -13,6 +13,7 @@
>   #include<linux/kernel_stat.h>
>   #include<linux/sched.h>
>   #include<linux/module.h>
> +#include<linux/smpboot.h>
>
>   #include<asm/mmu_context.h>
>   #include<asm/time.h>
> @@ -252,9 +253,6 @@ static void octeon_cpus_done(void)
>
>   #ifdef CONFIG_HOTPLUG_CPU
>
> -/* State of each CPU. */
> -DEFINE_PER_CPU(int, cpu_state);
> -
>   extern void fixup_irqs(void);
>
>   static DEFINE_SPINLOCK(smp_reserve_lock);
The Octeon bit:

Acked-by: David Daney <david.daney@xxxxxxxxxx>


FWIW, the rest looks good too.

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