perf, cgroups: Fix up for new API

Ben changed the cgroup API in commit f780bdb7c1c (cgroups: add
per-thread subsystem callbacks) in an incompatible way, but
forgot to convert the perf cgroup bits.

Avoid compile warnings and runtime splats and convert perf too ;-)

Acked-by: Ben Blum <bblum@andrew.cmu.edu>
Cc: Stephane Eranian <eranian@google.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1306767651.1200.2990.camel@twins
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/kernel/events/core.c b/kernel/events/core.c
index c09767f..8a15944 100644 (file)
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -7394,26 +7394,12 @@ static int __perf_cgroup_move(void *info)
        return 0;
 }
 
-static void perf_cgroup_move(struct task_struct *task)
+static void
+perf_cgroup_attach_task(struct cgroup *cgrp, struct task_struct *task)
 {
        task_function_call(task, __perf_cgroup_move, task);
 }
 
-static void perf_cgroup_attach(struct cgroup_subsys *ss, struct cgroup *cgrp,
-               struct cgroup *old_cgrp, struct task_struct *task,
-               bool threadgroup)
-{
-       perf_cgroup_move(task);
-       if (threadgroup) {
-               struct task_struct *c;
-               rcu_read_lock();
-               list_for_each_entry_rcu(c, &task->thread_group, thread_group) {
-                       perf_cgroup_move(c);
-               }
-               rcu_read_unlock();
-       }
-}
-
 static void perf_cgroup_exit(struct cgroup_subsys *ss, struct cgroup *cgrp,
                struct cgroup *old_cgrp, struct task_struct *task)
 {
@@ -7425,7 +7411,7 @@ static void perf_cgroup_exit(struct cgroup_subsys *ss, struct cgroup *cgrp,
        if (!(task->flags & PF_EXITING))
                return;
 
-       perf_cgroup_move(task);
+       perf_cgroup_attach_task(cgrp, task);
 }
 
 struct cgroup_subsys perf_subsys = {
@@ -7434,6 +7420,6 @@ struct cgroup_subsys perf_subsys = {
        .create         = perf_cgroup_create,
        .destroy        = perf_cgroup_destroy,
        .exit           = perf_cgroup_exit,
-       .attach         = perf_cgroup_attach,
+       .attach_task    = perf_cgroup_attach_task,
 };
 #endif /* CONFIG_CGROUP_PERF */