Task's cpuset pointer was removed by
commit 8793d854edbc ("Task Control Groups: make cpusets a client of cgroups")
Paragraph "The task_lock() exception ...." was removed by
commit 2df167a300d7 ("cgroups: update comments in cpuset.c")
Remove stale text:
We also require taking task_lock() when dereferencing a
task's cpuset pointer. See "The task_lock() exception", at the end of this
comment.
Accessing a task's cpuset should be done in accordance with the
guidelines for accessing subsystem state in kernel/cgroup.c
and reformat.
Co-developed-by: Michal Koutný <mkoutny@xxxxxxxx>
Co-developed-by: Waiman Long <longman@xxxxxxxxxx>
Signed-off-by: Costa Shulyupin <costa.shul@xxxxxxxxxx>
---
v2: Address comments
---
kernel/cgroup/cpuset.c | 9 ++-------
1 file changed, 2 insertions(+), 7 deletions(-)
diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c
index d5d2b4036314..ee62207fee9f 100644
--- a/kernel/cgroup/cpuset.c
+++ b/kernel/cgroup/cpuset.c
@@ -207,10 +207,8 @@ static struct cpuset top_cpuset = {
/*
* There are two global locks guarding cpuset structures - cpuset_mutex and
- * callback_lock. We also require taking task_lock() when dereferencing a
- * task's cpuset pointer. See "The task_lock() exception", at the end of this
- * comment. The cpuset code uses only cpuset_mutex. Other kernel subsystems
- * can use cpuset_lock()/cpuset_unlock() to prevent change to cpuset
+ * callback_lock. The cpuset code uses only cpuset_mutex. Other kernel
+ * subsystems can use cpuset_lock()/cpuset_unlock() to prevent change to cpuset
* structures. Note that cpuset_mutex needs to be a mutex as it is used in
* paths that rely on priority inheritance (e.g. scheduler - on RT) for
* correctness.
@@ -239,9 +237,6 @@ static struct cpuset top_cpuset = {
* The cpuset_common_seq_show() handlers only hold callback_lock across
* small pieces of code, such as when reading out possibly multi-word
* cpumasks and nodemasks.
- *
- * Accessing a task's cpuset should be done in accordance with the
- * guidelines for accessing subsystem state in kernel/cgroup.c
*/
static DEFINE_MUTEX(cpuset_mutex);
--
2.47.0
