[PATCH part2 v2 5/8] acpi, numa, mem_hotplug: Mark hotpluggable memoryin memblock

[Zhang Yanfei]

From: Tang Chen <tangchen@xxxxxxxxxxxxxx>

When parsing SRAT, we know that which memory area is hotpluggable.
So we invoke function memblock_mark_hotplug() introduced by previous
patch to mark hotpluggable memory in memblock.

Signed-off-by: Tang Chen <tangchen@xxxxxxxxxxxxxx>
Reviewed-by: Zhang Yanfei <zhangyanfei@xxxxxxxxxxxxxx>
---
 arch/x86/mm/numa.c |    2 ++
 arch/x86/mm/srat.c |    5 +++++
 2 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c
index ab69e1d..408c02d 100644
--- a/arch/x86/mm/numa.c
+++ b/arch/x86/mm/numa.c
@@ -569,6 +569,8 @@ static int __init numa_init(int (*init_func)(void))
 	memset(&numa_meminfo, 0, sizeof(numa_meminfo));
 	WARN_ON(memblock_set_node(0, ULLONG_MAX, &memblock.memory,
 				  MAX_NUMNODES));
+	/* In case that parsing SRAT failed. */
+	WARN_ON(memblock_clear_hotplug(0, ULLONG_MAX));
 	numa_reset_distance();
 
 	ret = init_func();
diff --git a/arch/x86/mm/srat.c b/arch/x86/mm/srat.c
index 266ca91..ca7c484 100644
--- a/arch/x86/mm/srat.c
+++ b/arch/x86/mm/srat.c
@@ -181,6 +181,11 @@ acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
 		(unsigned long long) start, (unsigned long long) end - 1,
 		hotpluggable ? " hotplug" : "");
 
+	/* Mark hotplug range in memblock. */
+	if (hotpluggable && memblock_mark_hotplug(start, ma->length))
+		pr_warn("SRAT: Failed to mark hotplug range [mem %#010Lx-%#010Lx] in memblock\n",
+			(unsigned long long) start, (unsigned long long) end - 1);
+
 	return 0;
 out_err_bad_srat:
 	bad_srat();
-- 
1.7.1
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