cpumask: Use find_last_bit()

Impact: cleanup

There's one obvious place to use it: to find the highest possible cpu.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

diff --git a/init/main.c b/init/main.c
index 84d3732..546ebd2 100644 (file)
--- a/init/main.c
+++ b/init/main.c
@@ -380,12 +380,7 @@ EXPORT_SYMBOL(nr_cpu_ids);
 /* An arch may set nr_cpu_ids earlier if needed, so this would be redundant */
 static void __init setup_nr_cpu_ids(void)
 {
-       int cpu, highest_cpu = 0;
-
-       for_each_possible_cpu(cpu)
-               highest_cpu = cpu;
-
-       nr_cpu_ids = highest_cpu + 1;
+       nr_cpu_ids = find_last_bit(cpumask_bits(cpu_possible_mask),NR_CPUS) + 1;
 }
 
 #ifndef CONFIG_HAVE_SETUP_PER_CPU_AREA