linux-kernel - Re: [PATCH] coresight: etm-perf: Fix define build issue when built as module

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Message-ID: <20210415004325.GA955389@leoy-ThinkPad-X240s>
Date:   Thu, 15 Apr 2021 08:43:25 +0800
From:   Leo Yan <leo.yan@...aro.org>
To:     Mike Leach <mike.leach@...aro.org>
Cc:     linux-arm-kernel@...ts.infradead.org, coresight@...ts.linaro.org,
        mathieu.poirier@...aro.org, suzuki.poulose@....com,
        alexander.shishkin@...ux.intel.com, gregkh@...uxfoundation.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] coresight: etm-perf: Fix define build issue when built
 as module

On Wed, Apr 14, 2021 at 08:48:08PM +0100, Mike Leach wrote:
> CONFIG_CORESIGHT_SOURCE_ETM4X is undefined when built as module,
> CONFIG_CORESIGHT_SOURCE_ETM4X_MODULE is defined instead.
> 
> Therefore code in format_attr_contextid_show() not correctly complied
> when coresight built as module.
> 
> Use IS_ENABLED(CONFIG_CORESIGHT_SOURCE_ETM4X) to correct this.
> 
> Fixes: 88f11864cf1d ("coresight: etm-perf: Support PID tracing for kernel at EL2")
> Signed-off-by: Mike Leach <mike.leach@...aro.org>

Reviewed-by: Leo Yan <leo.yan@...aro.org>

And sorry for introducing mistakes when sending the patches.

> ---
>  drivers/hwtracing/coresight/coresight-etm-perf.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/hwtracing/coresight/coresight-etm-perf.c b/drivers/hwtracing/coresight/coresight-etm-perf.c
> index 560baefdfed8..b2d6db78a025 100644
> --- a/drivers/hwtracing/coresight/coresight-etm-perf.c
> +++ b/drivers/hwtracing/coresight/coresight-etm-perf.c
> @@ -78,7 +78,7 @@ static ssize_t format_attr_contextid_show(struct device *dev,
>  {
>  	int pid_fmt = ETM_OPT_CTXTID;
>  
> -#if defined(CONFIG_CORESIGHT_SOURCE_ETM4X)
> +#if IS_ENABLED(CONFIG_CORESIGHT_SOURCE_ETM4X)
>  	pid_fmt = is_kernel_in_hyp_mode() ? ETM_OPT_CTXTID2 : ETM_OPT_CTXTID;
>  #endif
>  	return sprintf(page, "config:%d\n", pid_fmt);
> -- 
> 2.17.1
>