linux-kernel - Re: [PATCH] Partially revert patch that encloses asm-offset.h numbers in brackets

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Message-ID: <28707.1288018465@redhat.com>
Date:	Mon, 25 Oct 2010 15:54:25 +0100
From:	David Howells <dhowells@...hat.com>
To:	"Jan Beulich" <JBeulich@...ell.com>
Cc:	dhowells@...hat.com, akpm@...ux-foundation.org, torvalds@...l.org,
	"Ingo Molnar" <mingo@...e.hu>,
	"Alexander van Heukelum" <heukelum@...tmail.fm>,
	"H. Peter Anvin" <hpa@...ux.intel.com>, linux-arch@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Partially revert patch that encloses asm-offset.h numbers in brackets

Jan Beulich <JBeulich@...ell.com> wrote:

> Isn't this a gas bug then? Anywhere you use a plain number you
> should also be permitted to use an expression.

Whoever defined the gas assembly syntax for binutils specified that (N) as an
operand defines an absolute address and N defines an immediate value.

However, prefixing an expression with a unary plus works for me, so adding
this into my patch:

-	s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 \2 /* \3 */:; \
+	s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 +(\2) /* \3 */:; \

Does that work for you?

David
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