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x86: put initial_pg_tables into .bss

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Impact: makes vmlinux section information more useful

Don't use ram after _end blindly for pagetables. aka init pages is before _end
put those pg table into .bss

[Adapted to use brk segment - Jeremy]

v2: keep initial page table up to 512M only.
v4: put initial page tables just before _end

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Yinghai Lu
2009-03-09 01:15:57 -07:00
committed by H. Peter Anvin
parent 796216a57f
commit 2bd2753ff4
2 changed files with 20 additions and 29 deletions
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6
arch/x86/kernel/vmlinux_32.lds.S
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@@ -210,6 +210,12 @@ SECTIONS
DWARF_DEBUG
}
/*
* Build-time check on the image size:
*/
ASSERT((_end - LOAD_OFFSET <= KERNEL_IMAGE_SIZE),
"kernel image bigger than KERNEL_IMAGE_SIZE")
#ifdef CONFIG_KEXEC
/* Link time checks */
#include <asm/kexec.h>