Revert "cpuacct: reduce one NULL check in fast-path"

This reverts commit 7a46c594bf7f1f2eeb1e12d4b857d5f581957a92.

This was applied to the x86 tree mistakenly, it belongs into the
scheduler tree.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/kernel/sched.c b/kernel/sched.c
index 2246591..f4c413b 100644 (file)
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -10001,11 +10001,10 @@ static void cpuacct_charge(struct task_struct *tsk, u64 cputime)
        cpu = task_cpu(tsk);
        ca = task_ca(tsk);
 
-       do {
+       for (; ca; ca = ca->parent) {
                u64 *cpuusage = per_cpu_ptr(ca->cpuusage, cpu);
                *cpuusage += cputime;
-               ca = ca->parent;
-       } while (ca);
+       }
 }
 
 struct cgroup_subsys cpuacct_subsys = {