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From: Nikita Danilov <Nikita@Namesys.COM>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Arnd Bergmann <arnd@arndb.de>, linux-kernel@vger.kernel.org
Subject: Re: const versus __attribute__((const))
Date: Mon, 8 Dec 2003 21:27:11 +0300	[thread overview]
Message-ID: <16340.49791.585097.389128@laputa.namesys.com> (raw)
In-Reply-To: <3FD4B9E6.9090902@zytor.com>

H. Peter Anvin writes:
 > Arnd Bergmann wrote:
 > > H. Peter Anvin writes:
 > > 
 > >>I have made a patch against the current tree defining
 > >>__attribute_const__ in <linux/compiler.h> and using it in the above
 > >>cases; does anyone know any reason why I should *NOT* submit this to
 > >>Linus?
 > > 
 > > 
 > > I noticed before that gcc appearantly ignores __attribute__((const))
 > > for inline functions, so both the original and your proposed code
 > > is rather pointless as an optimization, except for extern declarations.
 > > 
 > > I'd rather remove the 'const' completely where it causes warnings for
 > > inline functions.
 > > 
 > 
 > These functions are available to userspace, though, and can be compiled 
 > with -O0; thus not inlined.

And future versions of gcc can be smarter.

 > 
 > 	-hpa

Nikita.


  reply	other threads:[~2003-12-08 18:27 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-12-08 15:46 const versus __attribute__((const)) Arnd Bergmann
2003-12-08 17:50 ` H. Peter Anvin
2003-12-08 18:27   ` Nikita Danilov [this message]
2003-12-08 18:31     ` H. Peter Anvin
2003-12-09  2:59       ` Jamie Lokier
2003-12-09  3:21         ` H. Peter Anvin
2003-12-09  3:49           ` Jamie Lokier
2003-12-09  5:37             ` H. Peter Anvin
2003-12-09  7:26               ` Linus Torvalds
2003-12-09  7:40                 ` H. Peter Anvin
2003-12-09 11:56                   ` Arnd Bergmann
2003-12-09 15:42                     ` H. Peter Anvin
2003-12-09 16:44                       ` Linus Torvalds
2003-12-09 16:51                         ` H. Peter Anvin
2003-12-09 19:15                           ` Jamie Lokier
2003-12-09  7:19             ` Linus Torvalds
  -- strict thread matches above, loose matches on Subject: below --
2003-12-08  1:19 H. Peter Anvin
2003-12-08 12:32 ` Nikita Danilov

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