[PATCH v9 03/14] irqchip/gic-v3-its: Resolve the default NUMA node explicitly

["Aneesh Kumar K.V (Arm)" <aneesh.kumar@kernel.org>]

alloc_pages_node() resolves NUMA_NO_NODE to numa_mem_id() internally. In
preparation for switching ITS allocations to the CoCo shared memory
allocator, resolve the default node explicitly in
its_alloc_pages_node().

The CoCo shared memory allocator interprets NUMA_NO_NODE as a request to
apply the current task's memory policy. Resolving it to numa_mem_id() in
the common ITS allocation helper preserves the existing
nearest-memory-node placement for all callers

This patch does not change the current allocation behavior.

Cc: Marc Zyngier <maz@kernel.org>
Cc: Thomas Gleixner <tglx@kernel.org>
Cc: Radu Rendec <radu@rendec.net>
Signed-off-by: Aneesh Kumar K.V (Arm) <aneesh.kumar@kernel.org>
---
 drivers/irqchip/irq-gic-v3-its.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index 282e4bafb084..a8860aaadf90 100644
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -32,6 +32,7 @@
 #include <linux/set_memory.h>
 #include <linux/slab.h>
 #include <linux/syscore_ops.h>
+#include <linux/topology.h>
 
 #include <linux/irqchip.h>
 #include <linux/irqchip/arm-gic-v3.h>
@@ -218,6 +219,9 @@ static struct page *its_alloc_pages_node(int node, gfp_t gfp,
 	struct page *page;
 	int ret = 0;
 
+	if (node == NUMA_NO_NODE)
+		node = numa_mem_id();
+
 	page = alloc_pages_node(node, gfp | gfp_flags_quirk, order);
 
 	if (!page)
-- 
2.43.0