From: Linus Torvalds <torvalds@linux-foundation.org>
To: Matthias Kaehlcke <mka@chromium.org>
Cc: Arnd Bergmann <arnd@arndb.de>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Ingo Molnar <mingo@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Christoph Hellwig <hch@lst.de>, Jens Axboe <axboe@kernel.dk>,
Steven Rostedt <rostedt@goodmis.org>,
David Rientjes <rientjes@google.com>,
Douglas Anderson <dianders@chromium.org>,
Guenter Roeck <linux@roeck-us.net>,
Mark Brown <broonie@kernel.org>,
David Miller <davem@davemloft.net>
Subject: Re: [RFC] clang: 'unused-function' warning on static inline functions
Date: Tue, 6 Jun 2017 14:28:03 -0700 [thread overview]
Message-ID: <CA+55aFzzcz9p7c_VS2JDd-1735Yfb8Mgu6YJTYnFAY2KSiW5gA@mail.gmail.com> (raw)
In-Reply-To: <20170606212354.GZ141096@google.com>
On Tue, Jun 6, 2017 at 2:23 PM, Matthias Kaehlcke <mka@chromium.org> wrote:
>
> I tend to disagree, the warning is useful to detect truly unused
> static inline functions, which should be removed, rather than be
> carried around/maintained for often long periods of time.
That may be true in other projects, but we really do have a lot of
code that is conditionally used. The warning is just not useful.
I agree that we could use "__maybe_unused", but at the same time, I
don't really see the point. There's no way in hell we'd ever do that
for inlines that are in header files (*of course* they may be unused),
why would we then haev a magical rule like "let's do it for inlines in
C files".
I applied the patch from David Rientjes to just make "inline"
automatically mean "maybe unused" for clang.
Linus
next prev parent reply other threads:[~2017-06-06 21:28 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-30 18:13 [RFC] clang: 'unused-function' warning on static inline functions Matthias Kaehlcke
2017-05-31 23:55 ` Matthias Kaehlcke
2017-06-06 11:16 ` Arnd Bergmann
2017-06-06 16:32 ` Linus Torvalds
2017-06-06 21:23 ` Matthias Kaehlcke
2017-06-06 21:28 ` Linus Torvalds [this message]
2017-06-07 0:28 ` Matthias Kaehlcke
2017-06-07 5:59 ` David Rientjes
2017-06-07 19:43 ` Arnd Bergmann
2017-06-07 20:36 ` Linus Torvalds
2017-06-07 21:24 ` Steven Rostedt
2017-06-08 8:59 ` Arnd Bergmann
2017-06-06 21:29 ` Jens Axboe
2017-06-07 8:17 ` Arnd Bergmann
2017-06-07 12:58 ` Steven Rostedt
2017-06-07 13:12 ` Arnd Bergmann
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