powerpc/smp: Lookup avail once per device tree node

The of_device_is_available() check only needs to be done once per device node, there's no need to repeat it for each thread. Move it out of the loop. Signed-off-by: Michael Ellerman <[email protected]> Link: https://msgid.link/[email protected]
esmil · Feb 14, 2024 · dca7960 · dca7960
1 parent 777f81f
commit dca7960
Showing 1 changed file with 5 additions and 6 deletions.
diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
@@ -468,17 +468,16 @@ void __init smp_setup_cpu_maps(void)
 
 		nthreads = len / sizeof(int);
 
+		bool avail = of_device_is_available(dn);
+		if (!avail)
+			avail = !of_property_match_string(dn,
+					"enable-method", "spin-table");
+
 		for (j = 0; j < nthreads && cpu < nr_cpu_ids; j++) {
-			bool avail;
 
 			DBG("    thread %d -> cpu %d (hard id %d)\n",
 			    j, cpu, be32_to_cpu(intserv[j]));
 
-			avail = of_device_is_available(dn);
-			if (!avail)
-				avail = !of_property_match_string(dn,
-						"enable-method", "spin-table");
-
 			set_cpu_present(cpu, avail);
 			set_cpu_possible(cpu, true);
 			cpu_to_phys_id[cpu] = be32_to_cpu(intserv[j]);