From: Viresh Kumar <viresh.kumar@linaro.org>
To: Murali Karicheri <m-karicheri2@ti.com>
Cc: akpm@linux-foundation.org, linaro-kernel@lists.linaro.org,
linux-kernel@vger.kernel.org,
open list: TI NETCP ETHERNET DRIVER <netdev@vger.kernel.org>,
Wingman Kwok <w-kwok2@ti.com>, ;
Subject: Re: [PATCH 08/15] drivers: net: Drop unlikely before IS_ERR(_OR_NULL)
Date: Fri, 31 Jul 2015 21:50:18 +0530 [thread overview]
Message-ID: <20150731162018.GD899@linux> (raw)
In-Reply-To: <55BB8E7B.7050307@ti.com>
On 31-07-15, 11:04, Murali Karicheri wrote:
> On 07/31/2015 04:38 AM, Viresh Kumar wrote:
> >IS_ERR(_OR_NULL) already contain an 'unlikely' compiler flag and there
> >is no need to do that again from its callers. Drop it.
> >
>
> IS_ERR_OR_NULL() is defined as
>
> static inline bool __must_check IS_ERR_OR_NULL(__force const void *ptr)
> {
> return !ptr || IS_ERR_VALUE((unsigned long)ptr);
> }
>
> So the unlikely() applies only to second part. Wouldn't that be a
> problem for optimization?
This is what the first patch of the series does:
http://permalink.gmane.org/gmane.linux.kernel/2009151
--
viresh
next prev parent reply other threads:[~2015-07-31 16:20 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <cover.1438331416.git.viresh.kumar@linaro.org>
2015-07-31 8:38 ` [PATCH 08/15] drivers: net: Drop unlikely before IS_ERR(_OR_NULL) Viresh Kumar
2015-07-31 15:04 ` Murali Karicheri
2015-07-31 15:39 ` David Laight
2015-07-31 16:20 ` Viresh Kumar [this message]
2015-08-03 15:52 ` Murali Karicheri
[not found] ` <cover.1438331416.git.viresh.kumar-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2015-07-31 8:38 ` [PATCH 15/15] " Viresh Kumar
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