netdev - Re: Lots of new warnings with gcc-7.1.1

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Message-ID: <CA+55aFyKpezj3oHwtBShyf9x-DJNAGQhrq55iVGM42eWKQtP3w@mail.gmail.com>
Date:   Tue, 11 Jul 2017 20:17:21 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Guenter Roeck <linux@...ck-us.net>
Cc:     Tejun Heo <tj@...nel.org>, Jean Delvare <jdelvare@...e.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Sathya Prakash <sathya.prakash@...adcom.com>,
        "James E.J. Bottomley" <jejb@...ux.vnet.ibm.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "the arch/x86 maintainers" <x86@...nel.org>,
        xen-devel <xen-devel@...ts.xenproject.org>,
        linux-block <linux-block@...r.kernel.org>,
        Linux Media Mailing List <linux-media@...r.kernel.org>,
        IDE-ML <linux-ide@...r.kernel.org>,
        "linux-fbdev@...r.kernel.org" <linux-fbdev@...r.kernel.org>,
        Network Development <netdev@...r.kernel.org>
Subject: Re: Lots of new warnings with gcc-7.1.1

On Tue, Jul 11, 2017 at 8:10 PM, Guenter Roeck <linux@...ck-us.net> wrote:
>
> The hwmon warnings are all about supporting no more than 9,999 sensors
> (applesmc) to 999,999,999 sensors (scpi) of a given type.

Yeah, I think that's enough.

> Easy "fix" would be to replace snprintf() with scnprintf(), presumably
> because gcc doesn't know about scnprintf().

If that's the case, I'd prefer just turning off the format-truncation
(but not overflow) warning with '-Wno-format-trunction".

But maybe we can at least start it on a subsystem-by-subsystem basis
after people have verified their own subsusystem?

                  Linus