linux-kernel - Re: [PATCH] drm/selftests: reduce stack usage

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Message-ID: <20190701075129.wu5q5j2cl6fkkzxp@flea>
Date:   Mon, 1 Jul 2019 09:51:29 +0200
From:   Maxime Ripard <maxime.ripard@...tlin.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Noralf Trønnes <noralf@...nnes.org>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/selftests: reduce stack usage

On Fri, Jun 28, 2019 at 02:16:45PM +0200, Arnd Bergmann wrote:
> Putting a large drm_connector object on the stack can lead to warnings
> in some configuration, such as:
>
> drivers/gpu/drm/selftests/test-drm_cmdline_parser.c:18:12: error: stack frame size of 1040 bytes in function 'drm_cmdline_test_res' [-Werror,-Wframe-larger-than=]
> static int drm_cmdline_test_res(void *ignored)
>
> Since the object is never modified, just declare it as 'static const'
> and allow this to be passed down.
>
> Fixes: b7ced38916a9 ("drm/selftests: Add command line parser selftests")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

Applied, thanks!
Maxime

--
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

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