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authorYinghai Lu <yinghai@kernel.org>2012-10-22 16:35:18 -0700
committerH. Peter Anvin <hpa@linux.intel.com>2012-10-24 11:52:36 -0700
commit1f2ff682ac951ed82cc043cf140d2851084512df (patch)
tree179de9631548719d1bc26d530593fc71ec49d0e7 /arch
parent6ede1fd3cb404c0016de6ac529df46d561bd558b (diff)
x86, mm: Use memblock memory loop instead of e820_RAM
We need to handle E820_RAM and E820_RESERVED_KERNEL at the same time. Also memblock has page aligned range for ram, so we could avoid mapping partial pages. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Link: http://lkml.kernel.org/r/CAE9FiQVZirvaBMFYRfXMmWEcHbKSicQEHz4VAwUv0xFCk51ZNw@mail.gmail.com Acked-by: Jacob Shin <jacob.shin@amd.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Cc: <stable@vger.kernel.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kernel/setup.c15
1 files changed, 8 insertions, 7 deletions
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 468e98dfd44e..5d888af8682a 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -921,18 +921,19 @@ void __init setup_arch(char **cmdline_p)
#ifdef CONFIG_X86_64
if (max_pfn > max_low_pfn) {
int i;
- for (i = 0; i < e820.nr_map; i++) {
- struct e820entry *ei = &e820.map[i];
+ unsigned long start, end;
+ unsigned long start_pfn, end_pfn;
- if (ei->addr + ei->size <= 1UL << 32)
- continue;
+ for_each_mem_pfn_range(i, MAX_NUMNODES, &start_pfn, &end_pfn,
+ NULL) {
- if (ei->type == E820_RESERVED)
+ end = PFN_PHYS(end_pfn);
+ if (end <= (1UL<<32))
continue;
+ start = PFN_PHYS(start_pfn);
max_pfn_mapped = init_memory_mapping(
- ei->addr < 1UL << 32 ? 1UL << 32 : ei->addr,
- ei->addr + ei->size);
+ max((1UL<<32), start), end);
}
/* can we preseve max_low_pfn ?*/