linux-kernel - Re: [PATCH v3 6/7] sched/topology: Introduce SD metaflag for flags needing

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Message-ID: <20200713123959.GI10769@hirez.programming.kicks-ass.net>
Date:   Mon, 13 Jul 2020 14:39:59 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Valentin Schneider <valentin.schneider@....com>
Cc:     linux-kernel@...r.kernel.org, mingo@...nel.org,
        vincent.guittot@...aro.org, dietmar.eggemann@....com,
        morten.rasmussen@....com
Subject: Re: [PATCH v3 6/7] sched/topology: Introduce SD metaflag for flags
 needing > 1 groups

On Wed, Jul 01, 2020 at 08:06:54PM +0100, Valentin Schneider wrote:
> +/* Generate a mask of SD flags with the SDF_NEEDS_GROUPS metaflag */
> +#define SD_FLAG(name, idx, mflags) (BIT(idx) * (((mflags) & SDF_NEEDS_GROUPS) / SDF_NEEDS_GROUPS)) |

#define SD_FLAGS(name, idx, mflags) (!!((mflags) & SDF_NEEDS_GROUPS) * BIT(idx))

> +static const int SD_DEGENERATE_GROUPS_MASK =
> +#include<linux/sched/sd_flags.h>
> +0;
> +#undef SD_FLAG
> +
>  #ifdef CONFIG_SCHED_DEBUG
>  #define SD_FLAG(_name, idx, mflags) [idx] = {.meta_flags = mflags, .name = #_name},
>  static const struct {
> -- 
> 2.27.0
>