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authorJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>2009-02-27 21:27:38 (GMT)
committerH. Peter Anvin <hpa@zytor.com>2009-03-15 00:23:47 (GMT)
commitccf3fe02e35f4abca2589f99022cc25084bbd8ae (patch)
tree3bcf329116b8c689b4da1bb1a0d87bb587d3f3c7 /arch/x86/lguest
parent5368a2be34b96fda9c05d79424fa63a73ead04ed (diff)
downloadlinux-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.c8
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;