linux-kernel - Re: -mm merge plans for 2.6.21

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Message-ID: <20070112231925.GA7273@slug>
Date:	Fri, 12 Jan 2007 23:19:25 +0000
From:	Frederik Deweerdt <deweerdt@...e.fr>
To:	Robert Hancock <hancockr@...w.ca>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	Arnd Bergmann <arnd@...db.de>, arjan@...radead.org
Subject: Re: -mm merge plans for 2.6.21

On Sat, Feb 10, 2007 at 11:04:48AM -0600, Robert Hancock wrote:
> Frederik Deweerdt wrote:
> >>How about this one instead then:
> >Well, the warning you get is not that obvious:
> >test.c: In function 'main':
> >test.c:11: warning: 'deprecated_irqf' is deprecated
> >And as far as I could test 
... which apparently was not enough :)
> >(gcc 4.1.1 and gcc 3.4.3), Arjan's comment is
> >not true, the "static const int" don't use extra space, they get
> >optimized away by the compiler (see http://lkml.org/lkml/2007/2/9/106).
> 
> gcc 3.2 should be tested as well, that is still supported by the kernel, and versions before 3.4 did not have unit-at-a-time optimizations.
Sorry for the delay. I've setup a 3.2.3 gcc and, indeed, the symbols
make their way in the binary...

$ gcc-3.2.3 -O2 -c dont_use_flag.c
$ nm dont_use_flag.o
00000000 r SA_INTERRUPT
00000000 T main
         U printf

Regards,
Frederik
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