linux-kernel - Re: [PATCH 3/3] staging: lustre: Less function calls in class_register

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Message-ID: <5656AFEC.8030709@users.sourceforge.net>
Date:	Thu, 26 Nov 2015 08:08:28 +0100
From:	SF Markus Elfring <elfring@...rs.sourceforge.net>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	Andreas Dilger <andreas.dilger@...el.com>,
	Oleg Drokin <oleg.drokin@...el.com>,
	lustre-devel@...ts.lustre.org, devel@...verdev.osuosl.org,
	Julia Lawall <julia.lawall@...6.fr>,
	kernel-janitors@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/3] staging: lustre: Less function calls in
 class_register_type() after error detection

Am 25.11.2015 um 17:39 schrieb Greg Kroah-Hartman:
> On Thu, Nov 05, 2015 at 01:20:33PM +0100, SF Markus Elfring wrote:
>> From: Markus Elfring <elfring@...rs.sourceforge.net>
>> Date: Thu, 5 Nov 2015 12:48:58 +0100
>>
>> The functions "kfree" and "kobject_put" were called in a few cases by the
>> function "class_register_type" during error handling even if the passed
>> variable contained a null pointer.
>>
>> This implementation detail could be improved by the adjustment of
>> jump targets.
>>
>> Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
>> ---
>>  drivers/staging/lustre/lustre/obdclass/genops.c | 26 +++++++++++++++----------
>>  1 file changed, 16 insertions(+), 10 deletions(-)
> 
> Does not apply to my staging-next branch :(

I get also a result like the following together with the software "Linux next-20151126".   ;-)

elfring@...ne:~/Projekte/Linux/next-patched> LANG=C git apply ~/Projekte/Bau/Linux/scripts/Coccinelle/deletions1/next/20151102/Flicken/0003-staging-lustre-Less-function-calls-in-class_register.patch
error: patch failed: drivers/staging/lustre/lustre/obdclass/genops.c:214
error: drivers/staging/lustre/lustre/obdclass/genops.c: patch does not apply


Do you try this update suggestion out without integrating the corresponding previous
update suggestion "Delete unnecessary checks before two function calls"
where I proposed to remove extra checks before a few calls of the function "kobject_put"
(which seems to matter for the patch hunk in the shown error message)?
https://lkml.org/lkml/2015/11/5/276
https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg1013635.html

Would you like to reject the first update step from this patch series
so that I need to adapt my approach to your software design decision?

Regards,
Markus
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