It can be used to find NODE_DATA for numa.
Need to make sure early_node_map[] is filled before it is called, otherwise
it will fallback to lmb_find_area(), with node range.
Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>
---
include/linux/lmb.h | 1 +
mm/lmb.c | 15 +++++++++++++++
2 files changed, 16 insertions(+), 0 deletions(-)
diff --git a/include/linux/lmb.h b/include/linux/lmb.h
index 5dbc4ef..4078825 100644
--- a/include/linux/lmb.h
+++ b/include/linux/lmb.h
@@ -91,6 +91,7 @@ void lmb_add_memory(u64 start, u64 end);
u64 __lmb_find_area(u64 ei_start, u64 ei_last, u64 start, u64 end,
u64 size, u64 align);
u64 lmb_find_area(u64 start, u64 end, u64 size, u64 align);
+u64 lmb_find_area_node(int nid, u64 start, u64 end, u64 size, u64 align);
void lmb_to_bootmem(u64 start, u64 end);
struct range;
diff --git a/mm/lmb.c b/mm/lmb.c
index cf0f1c9..d3a58fb 100644
--- a/mm/lmb.c
+++ b/mm/lmb.c
@@ -791,6 +791,21 @@ u64 __init __weak lmb_find_area(u64 start, u64 end, u64 size, u64 align)
return -1ULL;
}
/*
+ * Need to call this function after lmb_register_active_regions,
+ * so early_node_map[] is filled already.
+ */
+u64 __init lmb_find_area_node(int nid, u64 start, u64 end, u64 size, u64 align)
+{
+ u64 addr;
+ addr = find_memory_core_early(nid, size, align, start, end);
+ if (addr != -1ULL)
+ return addr;
+
+ /* Fallback, should already have start end within node range */
+ return lmb_find_area(start, end, size, align);
+}
+
+/*
* Finds an active region in the address range from start_pfn to last_pfn and
* returns its range in ei_startpfn and ei_endpfn for the lmb entry.
*/
--
1.6.4.2
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