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Re: huge gcc 4.1.{0,1} __weak problem

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From: Jakub Jelinek <jakub@...>
To: Andrew Morton <akpm@...>
Cc: Venki Pallipadi <venkatesh.pallipadi@...>, <torvalds@...>, <bunk@...>, <davem@...>, <trini@...>, <mingo@...>, <tglx@...>, <hpa@...>, <linux-kernel@...>, <suresh.b.siddha@...>
Subject: Re: huge gcc 4.1.{0,1} __weak problem
Date: Thursday, May 1, 2008 - 6:49 pm

On Thu, May 01, 2008 at 03:42:38PM -0700, Andrew Morton wrote:

for (;;); isn't enough, the function would be still considered const and by
4.1.0 and some 4.1.1 incorrectly optimized out, without regard to weak
attribute.
But e.g.
asm ("");
should be enough.

	Jakub
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Messages in current thread:
[PATCH] /dev/mem gcc weak function workaround, Venki Pallipadi, (Tue Apr 29, 9:31 pm)
Re: [PATCH] /dev/mem gcc weak function workaround, David Miller, (Wed Apr 30, 12:28 am)
RE: [PATCH] /dev/mem gcc weak function workaround, Pallipadi, Venkatesh, (Wed Apr 30, 8:49 am)
huge gcc 4.1.{0,1} __weak problem, Adrian Bunk, (Thu May 1, 5:56 pm)
Re: huge gcc 4.1.{0,1} __weak problem, Jeremy Fitzhardinge, (Fri May 2, 5:09 pm)
Re: huge gcc 4.1.{0,1} __weak problem, Adrian Bunk, (Fri May 2, 5:19 pm)
Re: huge gcc 4.1.{0,1} __weak problem, Andrew Morton, (Thu May 1, 6:20 pm)
Re: huge gcc 4.1.{0,1} __weak problem, Linus Torvalds, (Thu May 1, 6:27 pm)
[2.6.26 patch] #error for gcc 4.1.{0,1}, Adrian Bunk, (Thu Jun 26, 6:37 am)
Re: huge gcc 4.1.{0,1} __weak problem, David Miller, (Thu May 1, 6:51 pm)
Re: huge gcc 4.1.{0,1} __weak problem, Venki Pallipadi, (Thu May 1, 6:35 pm)
Re: huge gcc 4.1.{0,1} __weak problem, Tom Rini, (Thu May 1, 7:23 pm)
Re: huge gcc 4.1.{0,1} __weak problem, Andrew Morton, (Thu May 1, 6:42 pm)
Re: huge gcc 4.1.{0,1} __weak problem, Tom Rini, (Thu May 1, 7:21 pm)
Re: huge gcc 4.1.{0,1} __weak problem, Venki Pallipadi, (Thu May 1, 7:30 pm)
Re: huge gcc 4.1.{0,1} __weak problem, Linus Torvalds, (Thu May 1, 8:34 pm)
Re: huge gcc 4.1.{0,1} __weak problem, Suresh Siddha, (Thu May 1, 8:39 pm)
Re: huge gcc 4.1.{0,1} __weak problem, Jeremy Fitzhardinge, (Fri May 2, 5:11 pm)
Re: huge gcc 4.1.{0,1} __weak problem, David Miller, (Fri May 2, 6:02 pm)
Re: huge gcc 4.1.{0,1} __weak problem, Jakub Jelinek, (Thu May 1, 6:49 pm)
Re: huge gcc 4.1.{0,1} __weak problem, Andrew Morton, (Thu May 1, 6:33 pm)
Re: huge gcc 4.1.{0,1} __weak problem, Tom Rini, (Thu May 1, 7:24 pm)
Re: huge gcc 4.1.{0,1} __weak problem, Andrew Morton, (Thu May 1, 7:59 pm)
Re: huge gcc 4.1.{0,1} __weak problem, Andi Kleen, (Fri May 2, 5:09 am)
Re: huge gcc 4.1.{0,1} __weak problem, Adrian Bunk, (Fri May 2, 4:10 am)
Re: huge gcc 4.1.{0,1} __weak problem, Vegard Nossum, (Fri May 2, 3:18 am)
Re: huge gcc 4.1.{0,1} __weak problem, Theodore Tso, (Fri May 2, 9:43 am)
Re: huge gcc 4.1.{0,1} __weak problem, Justin Mattock, (Thu May 1, 8:21 pm)
Re: [PATCH] /dev/mem gcc weak function workaround, Tom Rini, (Wed Apr 30, 4:15 pm)