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| author | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2009-02-27 21:27:38 (GMT) |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2009-03-15 00:23:47 (GMT) |
| commit | ccf3fe02e35f4abca2589f99022cc25084bbd8ae (patch) | |
| tree | 3bcf329116b8c689b4da1bb1a0d87bb587d3f3c7 /arch/x86/lguest | |
| parent | 5368a2be34b96fda9c05d79424fa63a73ead04ed (diff) | |
| download | linux-ccf3fe02e35f4abca2589f99022cc25084bbd8ae.tar.xz | |
x86-32: use brk segment for allocating initial kernel pagetable
Impact: use new interface instead of previous ad hoc implementation
Rather than having special purpose init_pg_table_start/end variables
to delimit the kernel pagetable built by head_32.S, just use the brk
mechanism to extend the bss for the new pagetable.
This patch removes init_pg_table_start/end and pg0, defines __brk_base
(which is page-aligned and immediately follows _end), initializes
the brk region to start there, and uses it for the 32-bit pagetable.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86/lguest')
| -rw-r--r-- | arch/x86/lguest/boot.c | 8 |
1 files changed, 0 insertions, 8 deletions
diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c index 9fe4dda..90e44a1 100644 --- a/arch/x86/lguest/boot.c +++ b/arch/x86/lguest/boot.c @@ -1058,14 +1058,6 @@ __init void lguest_init(void) * lguest_init() where the rest of the fairly chaotic boot setup * occurs. */ - /* The native boot code sets up initial page tables immediately after - * the kernel itself, and sets init_pg_tables_end so they're not - * clobbered. The Launcher places our initial pagetables somewhere at - * the top of our physical memory, so we don't need extra space: set - * init_pg_tables_end to the end of the kernel. */ - init_pg_tables_start = __pa(pg0); - init_pg_tables_end = __pa(pg0); - /* As described in head_32.S, we map the first 128M of memory. */ max_pfn_mapped = (128*1024*1024) >> PAGE_SHIFT; |