linux-kernel - Re: [PATCH 11/28] ata: add CONFIG_SATA_HOST=n version of ata_ncq

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Message-ID: <20200129172448.GG12616@infradead.org>
Date:   Wed, 29 Jan 2020 09:24:48 -0800
From:   Christoph Hellwig <hch@...radead.org>
To:     Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Cc:     Jens Axboe <axboe@...nel.dk>,
        Michael Schmitz <schmitzmic@...il.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 11/28] ata: add CONFIG_SATA_HOST=n version of
 ata_ncq_enabled()

>  static inline int ata_ncq_enabled(struct ata_device *dev)
>  {
> +#ifdef CONFIG_SATA_HOST
>  	return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
>  			      ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
> +#else
> +	return 0;
> +#endif

I think this is a prime candidate for IS_ENABLED:

	if (!IS_ENABLED(CONFIG_SATA_HOST))
		return 0;
 	return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
  			      ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;