linux-kernel - Re: [Resend Patch v4 14/16] smp, s390: Kill SMP single function call interrupt

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Date:	Fri, 23 Jan 2015 07:54:10 +0100
From:	Heiko Carstens <heiko.carstens@...ibm.com>
To:	Jiang Liu <jiang.liu@...ux.intel.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	linux390@...ibm.com, Michael Holzheu <holzheu@...ux.vnet.ibm.com>,
	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>,
	Borislav Petkov <bp@...en8.de>,
	Tony Luck <tony.luck@...el.com>, linux-kernel@...r.kernel.org,
	linux-s390@...r.kernel.org
Subject: Re: [Resend Patch v4 14/16] smp, s390: Kill SMP single function call
 interrupt

On Fri, Jan 23, 2015 at 01:36:53PM +0800, Jiang Liu wrote:
> Commit 9a46ad6d6df3b54 "smp: make smp_call_function_many() use logic
> similar to smp_call_function_single()" has unified the way to handle
> single and multiple cross-CPU function calls. Now only one interrupt
> is needed for architecture specific code to support generic SMP function
> call interfaces, so kill the redundant single function call interrupt.
> 
> Signed-off-by: Jiang Liu <jiang.liu@...ux.intel.com>
> Acked-by: Heiko Carstens <heiko.carst...@...ibm.com>

Is this really the patch I acked, whenever that was? Because the patch
description doesn't match what your patch does.
All it does is renaming ec_call_function_single to ec_call_function,
nothing else.

Could you please resend with a proper patch description?
Thanks!

> ---
>  arch/s390/kernel/smp.c |   10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
> index 0b499f5cbe19..5b89eabc3a01 100644
> --- a/arch/s390/kernel/smp.c
> +++ b/arch/s390/kernel/smp.c
> @@ -50,7 +50,7 @@
> 
>  enum {
>  	ec_schedule = 0,
> -	ec_call_function_single,
> +	ec_call_function,
>  	ec_stop_cpu,
>  };
> 
> @@ -416,8 +416,8 @@ static void smp_handle_ext_call(void)
>  		smp_stop_cpu();
>  	if (test_bit(ec_schedule, &bits))
>  		scheduler_ipi();
> -	if (test_bit(ec_call_function_single, &bits))
> -		generic_smp_call_function_single_interrupt();
> +	if (test_bit(ec_call_function, &bits))
> +		generic_smp_call_function_interrupt();
>  }
> 
>  static void do_ext_call_interrupt(struct ext_code ext_code,
> @@ -432,12 +432,12 @@ void arch_send_call_function_ipi_mask(const struct cpumask *mask)
>  	int cpu;
> 
>  	for_each_cpu(cpu, mask)
> -		pcpu_ec_call(pcpu_devices + cpu, ec_call_function_single);
> +		pcpu_ec_call(pcpu_devices + cpu, ec_call_function);
>  }
> 
>  void arch_send_call_function_single_ipi(int cpu)
>  {
> -	pcpu_ec_call(pcpu_devices + cpu, ec_call_function_single);
> +	pcpu_ec_call(pcpu_devices + cpu, ec_call_function);
>  }
> 
>  #ifndef CONFIG_64BIT
> -- 
> 1.7.10.4
> 

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