linux-kernel - Re: [PATCH 2.6.19-rc1] radeonfb: check return value of sysfs_create_bin

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Message-Id: <1160611646.4792.24.camel@localhost.localdomain>
Date:	Thu, 12 Oct 2006 10:07:26 +1000
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Luca Tettamanti <kronos.it@...il.com>
Cc:	linux-kernel@...r.kernel.org, Greg KH <greg@...ah.com>
Subject: Re: [PATCH 2.6.19-rc1] radeonfb: check return value of
	sysfs_create_bin_file

On Thu, 2006-10-12 at 01:53 +0200, Luca Tettamanti wrote:
> sysfs_create_bin_file() is marked as warn_unused_result but we don't
> actually check the return value.
> Error is not fatal, the driver can operate fine without the files so
> just print a notice on failure.

I find this whole business of must check return value for sysfs files to
be gratuitous bloat. There are many cases (like this one) where we don't
really care and a printk will just increase the kernel size for no good
reason.

Maybe we can have a macro we can use to silence the warning when we
don't care about the result ? Can gcc do that ?

Ben.


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