From: SF Markus Elfring <elfring@users.sourceforge.net>
To: Paul Walmsley <paul@pwsan.com>
Cc: "Benoît Cousson" <bcousson@baylibre.com>,
"Russell King" <linux@arm.linux.org.uk>,
"Tony Lindgren" <tony@atomide.com>,
linux-arm-kernel@lists.infradead.org, linux-omap@vger.kernel.org,
LKML <linux-kernel@vger.kernel.org>,
kernel-janitors@vger.kernel.org,
"Julia Lawall" <julia.lawall@lip6.fr>
Subject: Re: ARM: OMAP2: Delete unnecessary checks before three function calls
Date: Thu, 16 Jul 2015 08:40:30 +0200 [thread overview]
Message-ID: <55A751DE.5080301@users.sourceforge.net> (raw)
In-Reply-To: <alpine.DEB.2.02.1507160548040.32764@utopia.booyaka.com>
> I have to say, I am a bit leery about applying the omap_device.c and
> omap_hwmod.c changes, since the called functions -- omap_device_delete()
> and clk_disable() -- don't explicitly document that NULLs are allowed
> to be passed in.
How are the chances to improve documentation around such implementation details?
> So there's no explicit contract that callers can rely upon, to (at least
> in theory) prevent those internal NULL pointer checks from being removed.
Are there any additional variations to consider for source files from different
processor architectures?
> So I would suggest that those two functions' kerneldoc be patched first to
> explicitly state that passing in a NULL pointer is allowed.
Should my static source code analysis approach help you any more to clarify
further open issues?
> So I'll apply that change now for v4.3, touching up the commit message accordingly.
Thanks for your constructive feedback.
>> arch/arm/mach-omap2/omap_device.c | 3 +--
>> arch/arm/mach-omap2/omap_hwmod.c | 5 +----
>> arch/arm/mach-omap2/timer.c | 3 +--
Did Tony Lindgren pick a similar update suggestion up, too?
https://lkml.org/lkml/2015/7/15/112
Regards,
Markus
next prev parent reply other threads:[~2015-07-16 6:40 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
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2014-11-17 13:15 ` ASoC: omap-mcbsp: Deletion of an unnecessary check before the function call "kfree" SF Markus Elfring
2014-11-17 19:11 ` Jarkko Nikula
2014-11-18 9:40 ` Mark Brown
2014-11-22 10:00 ` [PATCH 1/1] ARM: OMAP2: Deletion of unnecessary checks before three function calls SF Markus Elfring
2015-06-30 12:10 ` [PATCH] ARM: OMAP2: Delete " SF Markus Elfring
2015-07-16 5:55 ` Paul Walmsley
2015-07-16 6:23 ` Tony Lindgren
2015-07-16 14:06 ` Paul Walmsley
2015-07-16 16:28 ` Tony Lindgren
2015-07-16 6:40 ` SF Markus Elfring [this message]
2014-11-23 13:14 ` [PATCH 1/1] video: fbdev-OMAP2: Deletion of unnecessary checks before the function call "i2c_put_adapter" SF Markus Elfring
2015-02-03 10:21 ` [PATCH] ti-soc-thermal: Delete an unnecessary check before the function call "cpufreq_cooling_unregister" SF Markus Elfring
2015-06-25 11:33 ` [PATCH 0/2] ARM-OMAP2+: Deletion of unnecessary checks before two function calls SF Markus Elfring
2015-06-25 11:38 ` [PATCH 1/2] ARM-OMAP2+: Delete an unnecessary check before the function call "omap_device_delete" SF Markus Elfring
2015-06-25 11:40 ` [PATCH 2/2] ARM-OMAP2+: Delete an unnecessary check before the function call "of_node_put" SF Markus Elfring
2015-07-15 6:41 ` [PATCH 0/2] ARM-OMAP2+: Deletion of unnecessary checks before two function calls Tony Lindgren
2015-06-28 12:36 ` [PATCH] video: fbdev: omap2: displays-new: Delete a check before backlight_device_unregister() SF Markus Elfring
2016-07-23 17:09 ` [PATCH] memory: omap-gpmc: Delete an unnecessary check before the function call "gpiochip_free_own_desc" SF Markus Elfring
2016-08-01 9:32 ` Roger Quadros
2016-07-23 17:37 ` [PATCH] omapfb: panel-dsi-cm: Delete an unnecessary check before backlight_device_unregister() SF Markus Elfring
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