arch/alpha: replace cpumask_weight with cpumask_empty where appropriate

common_shutdown_1() 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/alpha/kernel/process.c b/arch/alpha/kernel/process.c
index 5f85270..0d4bc60 100644 (file)
--- a/arch/alpha/kernel/process.c
+++ b/arch/alpha/kernel/process.c
@@ -125,7 +125,7 @@ common_shutdown_1(void *generic_ptr)
        /* Wait for the secondaries to halt. */
        set_cpu_present(boot_cpuid, false);
        set_cpu_possible(boot_cpuid, false);
-       while (cpumask_weight(cpu_present_mask))
+       while (!cpumask_empty(cpu_present_mask))
                barrier();
 #endif