linux-kernel - Re: [PATCH 3/3] soc: qcom: rpmh-rsc: Fold WARN

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Message-ID: <20200424053748.GX20625@builder.lan>
Date:   Thu, 23 Apr 2020 22:37:48 -0700
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Stephen Boyd <swboyd@...omium.org>
Cc:     Andy Gross <agross@...nel.org>, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, Maulik Shah <mkshah@...eaurora.org>,
        Douglas Anderson <dianders@...omium.org>
Subject: Re: [PATCH 3/3] soc: qcom: rpmh-rsc: Fold WARN_ON() into if condition

On Thu 23 Apr 21:54 PDT 2020, Stephen Boyd wrote:

> Move the WARN_ON() into the if condition so the compiler can see that
> the branch is unlikely() and possibly optimize it better.
> 
> Cc: Maulik Shah <mkshah@...eaurora.org>
> Cc: Douglas Anderson <dianders@...omium.org>
> Signed-off-by: Stephen Boyd <swboyd@...omium.org>

Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>

> ---
>  drivers/soc/qcom/rpmh-rsc.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/drivers/soc/qcom/rpmh-rsc.c b/drivers/soc/qcom/rpmh-rsc.c
> index 462dd267afef..f7763f008e03 100644
> --- a/drivers/soc/qcom/rpmh-rsc.c
> +++ b/drivers/soc/qcom/rpmh-rsc.c
> @@ -373,10 +373,8 @@ static irqreturn_t tcs_tx_done(int irq, void *p)
>  
>  	for_each_set_bit(i, &irq_status, BITS_PER_TYPE(u32)) {
>  		req = get_req_from_tcs(drv, i);
> -		if (!req) {
> -			WARN_ON(1);
> +		if (WARN_ON(!req))
>  			goto skip;
> -		}
>  
>  		err = 0;
>  		for (j = 0; j < req->num_cmds; j++) {
> -- 
> Sent by a computer, using git, on the internet
>