linux-kernel - Re: [PATCH] x86: fix build with older binutils and consolidate linker script

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Message-Id: <4A92557002000078000113DD@vpn.id2.novell.com>
Date:	Mon, 24 Aug 2009 07:55:12 +0100
From:	"Jan Beulich" <JBeulich@...ell.com>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	<mingo@...e.hu>, <tglx@...utronix.de>, <sam@...nborg.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86: fix build with older binutils and
	 consolidate	 linker script

>>> "H. Peter Anvin" <hpa@...or.com> 21.08.09 22:23 >>>
>On 08/18/2009 08:51 AM, Jan Beulich wrote:
>>  
>>  #define VSYSCALL_ADDR (-10*1024*1024)
>> -#define VSYSCALL_PHYS_ADDR ((LOADADDR(.data.read_mostly) + \
>> -                            SIZEOF(.data.read_mostly) + 4095) & ~(4095))
>> -#define VSYSCALL_VIRT_ADDR ((ADDR(.data.read_mostly) + \
>> -                            SIZEOF(.data.read_mostly) + 4095) & ~(4095))
>> +#define VSYSCALL_PHYS_ADDR ((LOADADDR(.data) + SIZEOF(.data) + \
>> +                            PAGE_SIZE - 1) & ~(PAGE_SIZE - 1))
>> +#define VSYSCALL_VIRT_ADDR ((ADDR(.data) + SIZEOF(.data) + \
>> +                            PAGE_SIZE - 1) & ~(PAGE_SIZE - 1))
>>  
>
>I'm missing something with this chunk... could you please explain?

There are two changes here: One is the adjustment to properly use the
new preceding section's name, and the other is to replace the hard coded
4095 by PAGE_SIZE-1.

Jan

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