linux-kernel - Re: [PATCH] drm/xe/vm: Simplify if condition

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Date: Tue, 4 Jun 2024 18:06:22 +0000
From: Matthew Brost <matthew.brost@...el.com>
To: Thorsten Blum <thorsten.blum@...lux.com>
CC: <lucas.demarchi@...el.com>, <ogabbay@...nel.org>,
	<thomas.hellstrom@...ux.intel.com>, <maarten.lankhorst@...ux.intel.com>,
	<mripard@...nel.org>, <tzimmermann@...e.de>, <airlied@...il.com>,
	<daniel@...ll.ch>, <intel-xe@...ts.freedesktop.org>,
	<dri-devel@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drm/xe/vm: Simplify if condition

On Mon, Jun 03, 2024 at 08:00:07PM +0200, Thorsten Blum wrote:
> The if condition !A || A && B can be simplified to !A || B.
> 
> Fixes the following Coccinelle/coccicheck warning reported by
> excluded_middle.cocci:
> 
> 	WARNING !A || A && B is equivalent to !A || B
> 
> Compile-tested only.
> 
> Signed-off-by: Thorsten Blum <thorsten.blum@...lux.com>

Reviewed-by: Matthew Brost <matthew.brost@...el.com>

Will get this merged once our CI system is working.

> ---
>  drivers/gpu/drm/xe/xe_vm.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/xe/xe_vm.c b/drivers/gpu/drm/xe/xe_vm.c
> index 4aa3943e6f29..3137cbbaabde 100644
> --- a/drivers/gpu/drm/xe/xe_vm.c
> +++ b/drivers/gpu/drm/xe/xe_vm.c
> @@ -85,8 +85,8 @@ static bool preempt_fences_waiting(struct xe_vm *vm)
>  
>  	list_for_each_entry(q, &vm->preempt.exec_queues, compute.link) {
>  		if (!q->compute.pfence ||
> -		    (q->compute.pfence && test_bit(DMA_FENCE_FLAG_ENABLE_SIGNAL_BIT,
> -						   &q->compute.pfence->flags))) {
> +		    test_bit(DMA_FENCE_FLAG_ENABLE_SIGNAL_BIT,
> +			     &q->compute.pfence->flags)) {
>  			return true;
>  		}
>  	}
> -- 
> 2.39.2
>