arch/ia64: replace cpumask_weight with cpumask_empty where appropriate

setup_arch() calls cpumask_weight() to check if any bit of a given cpumask
is set. We can do it more efficiently with cpumask_empty() because
cpumask_empty() stops traversing the cpumask as soon as it finds first set
bit, while cpumask_weight() counts all bits unconditionally.

Signed-off-by: Yury Norov <yury.norov@gmail.com>

diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c
index 5010348..fd6301e 100644 (file)
--- a/arch/ia64/kernel/setup.c
+++ b/arch/ia64/kernel/setup.c
@@ -572,7 +572,7 @@ setup_arch (char **cmdline_p)
 #ifdef CONFIG_ACPI_HOTPLUG_CPU
        prefill_possible_map();
 #endif
-       per_cpu_scan_finalize((cpumask_weight(&early_cpu_possible_map) == 0 ?
+       per_cpu_scan_finalize((cpumask_empty(&early_cpu_possible_map) ?
                32 : cpumask_weight(&early_cpu_possible_map)),
                additional_cpus > 0 ? additional_cpus : 0);
 #endif /* CONFIG_ACPI_NUMA */