linux-kernel - Re: [PATCHv3 04/10] linux/kernel: introduce lower_48

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Message-ID: <20220222165613.GB1497257@dhcp-10-100-145-180.wdc.com>
Date:   Tue, 22 Feb 2022 08:56:13 -0800
From:   Keith Busch <kbusch@...nel.org>
To:     Christoph Hellwig <hch@....de>
Cc:     Joe Perches <joe@...ches.com>, linux-nvme@...ts.infradead.org,
        linux-block@...r.kernel.org, linux-crypto@...r.kernel.org,
        x86@...nel.org, linux-kernel@...r.kernel.org, axboe@...nel.dk,
        martin.petersen@...cle.com, colyli@...e.de,
        Bart Van Assche <bvanassche@....org>
Subject: Re: [PATCHv3 04/10] linux/kernel: introduce lower_48_bits macro

On Tue, Feb 22, 2022 at 05:50:45PM +0100, Christoph Hellwig wrote:
> On Tue, Feb 22, 2022 at 08:45:53AM -0800, Joe Perches wrote:
> > On Tue, 2022-02-22 at 08:31 -0800, Keith Busch wrote:
> > > +/**
> > > + * lower_48_bits - return bits 0-47 of a number
> > > + * @n: the number we're accessing
> > > + */
> > > +#define lower_48_bits(n) ((u64)((n) & 0xffffffffffffull))
> > 
> > why not make this a static inline function?
> 
> Agreed.

Sure, that sounds good to me. I only did it this way to match the
existing local convention, but I personally prefer the inline function
too.