From d0ec2c6f2c2f0478b34ae78b3e65f60a561ac807 Mon Sep 17 00:00:00 2001 From: "Huang, Ying" Date: Mon, 2 Jun 2008 14:26:18 +0800 Subject: x86: reserve highmem pages via reserve_early 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 Cc: andi@firstfloor.org Cc: mingo@redhat.com Signed-off-by: Thomas Gleixner --- arch/x86/kernel/e820.c | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'arch/x86/kernel/e820.c') diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c index ac5e9ebf70ea..a706e9057ba5 100644 --- a/arch/x86/kernel/e820.c +++ b/arch/x86/kernel/e820.c @@ -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; -- cgit v1.2.3