linux-kernel - Re: [PATCH v2 0/8] clean up vdso-layout.lds.S

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Date:	Mon, 15 Jun 2009 11:33:28 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Petr Tesarik <ptesarik@...e.cz>
CC:	Sam Ravnborg <sam@...nborg.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Andi Kleen <andi@...stfloor.org>,
	Roland McGrath <roland@...hat.com>
Subject: Re: [PATCH v2 0/8] clean up vdso-layout.lds.S

Petr Tesarik wrote:
>>>
>> *(COMMON) is BSS, not data...
> 
> Very true, but for the vDSO we decided to put both writeable and
> read-only data into one section (called .data for that matter), probably
> to reduce the number of sections and hence also the size of the
> resulting binary.
> 

BSS is neither, but I guess for the vDSO there really isn't any such
thing as uninitialized content.

I have to admit feeling funny about that, and I'm wondering if we
shouldn't compile the vDSO with -fno-common.

	-hpa

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