linux-kernel - Re: [PATCH] arm/smp: Drop the macro S(x,s)

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Date:   Fri, 20 Nov 2020 08:02:21 +0530
From:   Anshuman Khandual <anshuman.khandual@....com>
To:     linux-arm-kernel@...ts.infradead.org
Cc:     Russell King <linux@...linux.org.uk>,
        Marc Zyngier <maz@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm/smp: Drop the macro S(x,s)



On 11/9/20 5:17 PM, Anshuman Khandual wrote:
> Mapping between IPI type index and its string is direct without requiring
> an additional offset. Hence the existing macro S(x, s) is now redundant
> and can just be dropped. This also makes the code clean and simple.
> 
> Cc: Russell King <linux@...linux.org.uk>
> Cc: Marc Zyngier <maz@...nel.org>
> Cc: linux-arm-kernel@...ts.infradead.org
> Cc: linux-kernel@...r.kernel.org
> Signed-off-by: Anshuman Khandual <anshuman.khandual@....com>
> ---
> Only build tested.

Hello Russel,

Any updates on this ? Considering the patch being just a simple
cleanup, wondering if it can now be submitted in the arm patch
tracking system. Thank you.

- Anshuman
 
> 
>  arch/arm/kernel/smp.c | 15 +++++++--------
>  1 file changed, 7 insertions(+), 8 deletions(-)
> 
> diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
> index 48099c6e1e4a..6ab2b0ad5f40 100644
> --- a/arch/arm/kernel/smp.c
> +++ b/arch/arm/kernel/smp.c
> @@ -524,14 +524,13 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
>  }
>  
>  static const char *ipi_types[NR_IPI] __tracepoint_string = {
> -#define S(x,s)	[x] = s
> -	S(IPI_WAKEUP, "CPU wakeup interrupts"),
> -	S(IPI_TIMER, "Timer broadcast interrupts"),
> -	S(IPI_RESCHEDULE, "Rescheduling interrupts"),
> -	S(IPI_CALL_FUNC, "Function call interrupts"),
> -	S(IPI_CPU_STOP, "CPU stop interrupts"),
> -	S(IPI_IRQ_WORK, "IRQ work interrupts"),
> -	S(IPI_COMPLETION, "completion interrupts"),
> +	[IPI_WAKEUP]		= "CPU wakeup interrupts",
> +	[IPI_TIMER]		= "Timer broadcast interrupts",
> +	[IPI_RESCHEDULE]	= "Rescheduling interrupts",
> +	[IPI_CALL_FUNC]		= "Function call interrupts",
> +	[IPI_CPU_STOP]		= "CPU stop interrupts",
> +	[IPI_IRQ_WORK]		= "IRQ work interrupts",
> +	[IPI_COMPLETION]	= "completion interrupts",
>  };
>  
>  static void smp_cross_call(const struct cpumask *target, unsigned int ipinr);
>