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From: Paul E. McKenney on 14 Jul 2010 16:20
From: Arnd Bergmann <arnd(a)arndb.de>

Signed-off-by: Arnd Bergmann <arnd(a)arndb.de>
Signed-off-by: Paul E. McKenney <paulmck(a)linux.vnet.ibm.com>
Acked-by: Paul Menage <menage(a)google.com>
Cc: Li Zefan <lizf(a)cn.fujitsu.com>
---
include/linux/cgroup.h | 4 ++--
include/linux/sched.h | 2 +-
kernel/cgroup.c | 2 +-
3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index e3d00fd..1e7ce60 100644
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -75,7 +75,7 @@ struct cgroup_subsys_state {

unsigned long flags;
/* ID for this css, if possible */
- struct css_id *id;
+ struct css_id __rcu *id;
};

/* bits in struct cgroup_subsys_state flags field */
@@ -205,7 +205,7 @@ struct cgroup {
struct list_head children; /* my children */

struct cgroup *parent; /* my parent */
- struct dentry *dentry; /* cgroup fs entry, RCU protected */
+ struct dentry __rcu *dentry; /* cgroup fs entry, RCU protected */

/* Private pointers for each registered subsystem */
struct cgroup_subsys_state *subsys[CGROUP_SUBSYS_COUNT];
diff --git a/include/linux/sched.h b/include/linux/sched.h
index f118809..97fc7ee 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1427,7 +1427,7 @@ struct task_struct {
#endif
#ifdef CONFIG_CGROUPS
/* Control Group info protected by css_set_lock */
- struct css_set *cgroups;
+ struct css_set __rcu *cgroups;
/* cg_list protected by css_set_lock and tsk->alloc_lock */
struct list_head cg_list;
#endif
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 3ac6f5b..30c459b 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -138,7 +138,7 @@ struct css_id {
* is called after synchronize_rcu(). But for safe use, css_is_removed()
* css_tryget() should be used for avoiding race.
*/
- struct cgroup_subsys_state *css;
+ struct cgroup_subsys_state __rcu *css;
/*
* ID of this css.
*/
--
1.7.0.6

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Prev: [PATCH RFC tip/core/rcu 24/30] rcu: add shiny new debug assists to Documentation/RCU/checklist.txt
Next: [PATCH RFC tip/core/rcu 09/30] perf_event: __rcu annotations