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x86: reserve highmem pages via reserve_early

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This patch makes early reserved highmem pages become reserved
pages. This can be used for highmem pages allocated by bootloader such
as EFI memory map, linked list of setup_data, etc.

Signed-off-by: Huang Ying <ying.huang@intel.com>
Cc: andi@firstfloor.org
Cc: mingo@redhat.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Huang, Ying
2008-06-02 14:26:18 +08:00
committed by Thomas Gleixner
parent d3fbe5ea95
commit d0ec2c6f2c
3 changed files with 14 additions and 1 deletions
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11
arch/x86/kernel/e820.c
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@@ -612,6 +612,17 @@ void __init free_early(u64 start, u64 end)
early_res[j - 1].end = 0;
}
int __init page_is_reserved_early(unsigned long pagenr)
{
u64 start = (u64)pagenr << PAGE_SHIFT;
int i;
struct early_res *r;
i = find_overlapped_early(start, start + PAGE_SIZE);
r = &early_res[i];
return (i < MAX_EARLY_RES && r->end);
}
void __init early_res_to_bootmem(u64 start, u64 end)
{
int i;