[PATCH v2 1/3] arm64/numa: export memory_add_physaddr_to_nid as EXPORT_SYMBOL_GPL

Jia He
2020-07-07T05:59:39Z

This exports memory_add_physaddr_to_nid() for module driver to use.

memory_add_physaddr_to_nid() is a fallback option to get the nid in case
NUMA_NO_NID is detected.

Suggested-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Jia He <justin.he@arm.com>
---
arch/arm64/mm/numa.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/mm/numa.c b/arch/arm64/mm/numa.c
index aafcee3e3f7e..7eeb31740248 100644
--- a/arch/arm64/mm/numa.c
+++ b/arch/arm64/mm/numa.c
@@ -464,10 +464,11 @@ void __init arm64_numa_init(void)

/*
* We hope that we will be hotplugging memory on nodes we already know about,
- * such that acpi_get_node() succeeds and we never fall back to this...
+ * such that acpi_get_node() succeeds. But when SRAT is not present, the node
+ * id may be probed as NUMA_NO_NODE by acpi, Here provide a fallback option.
*/
int memory_add_physaddr_to_nid(u64 addr)
{
- pr_warn("Unknown node for memory at 0x%llx, assuming node 0\n", addr);
return 0;
}
+EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid);
--
2.17.1