linux-kernel - Re: AW: [PATCH] amd64: Fix csum_partial_copy

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Message-ID: <20231022111153.GB800259@ZenIV>
Date:   Sun, 22 Oct 2023 12:11:53 +0100
From:   Al Viro <viro@...iv.linux.org.uk>
To:     David Laight <David.Laight@...lab.com>
Cc:     Eric Dumazet <edumazet@...gle.com>,
        gus Gusenleitner Klaus <gus@...a.com>,
        Al Viro <viro@....linux.org.uk>,
        Thomas Gleixner <tglx@...utronix.de>,
        lkml <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...hat.com>, "bp@...en8.de" <bp@...en8.de>,
        "dave.hansen@...ux.intel.com" <dave.hansen@...ux.intel.com>,
        "x86@...nel.org" <x86@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        "dsahern@...nel.org" <dsahern@...nel.org>,
        "kuba@...nel.org" <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
Subject: Re: AW: [PATCH] amd64: Fix csum_partial_copy_generic()

On Sun, Oct 22, 2023 at 11:03:39AM +0000, David Laight wrote:

> > +			return -1;
> 
> If you are going to return -1 the return type should be signed.

It's a perfectly valid C to have return -1 in a function that
returns unsigned long long (or any other unsigned type, really)...