linux-kernel - Re: [PATCH 08/15] drivers: net: Drop unlikely before IS_ERR(_OR

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Message-ID: <20150731162018.GD899@linux>
Date:	Fri, 31 Jul 2015 21:50:18 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	Murali Karicheri <m-karicheri2@...com>
Cc:	akpm@...ux-foundation.org, linaro-kernel@...ts.linaro.org,
	linux-kernel@...r.kernel.org, open list:
	TI NETCP ETHERNET DRIVER <netdev@...r.kernel.org>,
	Wingman Kwok <w-kwok2@...com>, ;
Subject: Re: [PATCH 08/15] drivers: net: Drop unlikely before IS_ERR(_OR_NULL)

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
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