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Subject[tip:x86/urgent] x86, mm: Use memblock memory loop instead of e820_RAM
Commit-ID:  1f2ff682ac951ed82cc043cf140d2851084512df
Gitweb: http://git.kernel.org/tip/1f2ff682ac951ed82cc043cf140d2851084512df
Author: Yinghai Lu <yinghai@kernel.org>
AuthorDate: Mon, 22 Oct 2012 16:35:18 -0700
Committer: H. Peter Anvin <hpa@linux.intel.com>
CommitDate: Wed, 24 Oct 2012 11:52:36 -0700

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>
---
arch/x86/kernel/setup.c | 15 ++++++++-------
1 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 468e98d..5d888af 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 ?*/

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