linux-kernel - Re: [PATCH 01/17] bitfield: Add non-constant field

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Message-ID: <20211123154922.600fd3b5@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com>
Date:   Tue, 23 Nov 2021 15:49:22 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Johannes Berg <johannes@...solutions.net>
Cc:     Geert Uytterhoeven <geert@...ux-m68k.org>,
        Tony Lindgren <tony@...mide.com>,
        Russell King <linux@...linux.org.uk>,
        Rajendra Nayak <rnayak@...eaurora.org>,
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Subject: Re: [PATCH 01/17] bitfield: Add non-constant field_{prep,get}()
 helpers

On Tue, 23 Nov 2021 17:24:15 +0100 Johannes Berg wrote:
> > (*_replace_bits() seems to be useful, though)  
> 
> Indeed.
> 
> Also as I said in my other mail, the le32/be32/... variants are
> tremendously useful, and they fundamentally cannot be expressed with the
> FIELD_GET() or field_get() macros. IMHO this is a clear advantage to the

Can you elaborate?

> typed versions, and if you ask me we should get rid of the FIELD_GETand
> FIELD_PREP entirely - difficult now, but at least let's not propagate
> that?

I don't see why.