linux-kernel - Re: [PATCH 2/2] oprofile: Add __exit attibute to oprofile_arch

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Date:	Thu, 17 Mar 2011 12:41:40 +0100
From:	Robert Richter <robert.richter@....com>
To:	Mike Frysinger <vapier.adi@...il.com>
CC:	Ingo Molnar <mingo@...e.hu>, LKML <linux-kernel@...r.kernel.org>,
	oprofile-list <oprofile-list@...ts.sourceforge.net>,
	Heinz Graalfs <graalfs@...ux.vnet.ibm.com>
Subject: Re: [PATCH 2/2] oprofile: Add __exit attibute to
 oprofile_arch_exit() functions

On 16.03.11 16:15:49, Mike Frysinger wrote:
> On Wed, Mar 16, 2011 at 13:58, Robert Richter wrote:
> >  979048e oprofile: don't call arch exit code from init code on failure
> >
> > we may add __exit attibutes to oprofile_arch_exit() functions.
> 
> i dont think this the way to go.  how about updating one place
> (include/linux/oprofile.h:oprofile_arch_exit) and making sure all arch
> files are including that header if they arent already ?  after all, if
> they arent including that header, the arch code could break without
> noticing.

Mike,

do you mean we specify the __exit attribute in the function
declaration of the header file and make sure it is included
everythere? I was looking at current implementations in the kernel and
this is not common. Mostly the attributes are set in the function
definition. So I was not sure if that would work. If so, may we skip
then the __exit attribute in the definition?

GCC doc states: "The keyword __attribute__ allows you to specify
special attributes when making a declaration."

 http://gcc.gnu.org/onlinedocs/gcc-4.5.1/gcc/Function-Attributes.html#Function%20Attributes

but nothing about that happens if it is in the function definition and
this is different from the declaration.

-Robert

-- 
Advanced Micro Devices, Inc.
Operating System Research Center

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