cpumask: alpha: Introduce cpumask_of_{node,pcibus} to replace {node,pcibus}_to_cpumask

Impact: New APIs

The old node_to_cpumask/node_to_pcibus returned a cpumask_t: these
return a pointer to a struct cpumask.  Part of removing cpumasks from
the stack.

I'm not sure the existing code even compiles, but new version is
straightforward.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: Richard Henderson <rth@twiddle.net>

1 files changed, 17 insertions, 0 deletions

diff --git a/arch/alpha/include/asm/topology.h b/arch/alpha/include/asm/topology.h
index 149532e162c4..b4f284c72ff3 100644
--- a/arch/alpha/include/asm/topology.h
+++ b/arch/alpha/include/asm/topology.h
@@ -39,7 +39,24 @@ static inline cpumask_t node_to_cpumask(int node)
         return node_cpu_mask;
 }
 
+extern struct cpumask node_to_cpumask_map[];
+/* FIXME: This is dumb, recalculating every time.  But simple. */
+static const struct cpumask *cpumask_of_node(int node)
+{
+        int cpu;
+
+        cpumask_clear(&node_to_cpumask_map[node]);
+
+        for_each_online_cpu(cpu) {
+                if (cpu_to_node(cpu) == node)
+                        cpumask_set_cpu(cpu, node_to_cpumask_map[node]);
+        }
+
+        return &node_to_cpumask_map[node];
+}
+
 #define pcibus_to_cpumask(bus)  (cpu_online_map)
+#define cpumask_of_pcibus(bus)  (cpu_online_mask)
 
 #endif /* !CONFIG_NUMA */
 # include <asm-generic/topology.h>