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authorMichal Hocko <mhocko@suse.cz>2011-07-08 14:39:41 +0200
committerJiri Kosina <jkosina@suse.cz>2011-07-08 22:21:58 +0200
commitd8bf4ca9ca9576548628344c9725edd3786e90b1 (patch)
treedf338f50a5af6bc3651bd863b79fa91e6b1e9e20 /include/linux
parenteb032b9837a958e21ca000358a5bde5e17192ddb (diff)
rcu: treewide: Do not use rcu_read_lock_held when calling rcu_dereference_check
Since ca5ecddf (rcu: define __rcu address space modifier for sparse) rcu_dereference_check use rcu_read_lock_held as a part of condition automatically so callers do not have to do that as well. Signed-off-by: Michal Hocko <mhocko@suse.cz> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/cgroup.h1
-rw-r--r--include/linux/cred.h1
-rw-r--r--include/linux/fdtable.h1
-rw-r--r--include/linux/rtnetlink.h3
4 files changed, 1 insertions, 5 deletions
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index ab4ac0ccb85..da7e4bc34e8 100644
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -539,7 +539,6 @@ static inline struct cgroup_subsys_state *cgroup_subsys_state(
*/
#define task_subsys_state_check(task, subsys_id, __c) \
rcu_dereference_check(task->cgroups->subsys[subsys_id], \
- rcu_read_lock_held() || \
lockdep_is_held(&task->alloc_lock) || \
cgroup_lock_is_held() || (__c))
diff --git a/include/linux/cred.h b/include/linux/cred.h
index 82607992f30..f240f2fa019 100644
--- a/include/linux/cred.h
+++ b/include/linux/cred.h
@@ -284,7 +284,6 @@ static inline void put_cred(const struct cred *_cred)
({ \
const struct task_struct *__t = (task); \
rcu_dereference_check(__t->real_cred, \
- rcu_read_lock_held() || \
task_is_dead(__t)); \
})
diff --git a/include/linux/fdtable.h b/include/linux/fdtable.h
index 133c0ba25e3..df7e3cf82e9 100644
--- a/include/linux/fdtable.h
+++ b/include/linux/fdtable.h
@@ -60,7 +60,6 @@ struct files_struct {
#define rcu_dereference_check_fdtable(files, fdtfd) \
(rcu_dereference_check((fdtfd), \
- rcu_read_lock_held() || \
lockdep_is_held(&(files)->file_lock) || \
atomic_read(&(files)->count) == 1 || \
rcu_my_thread_group_empty()))
diff --git a/include/linux/rtnetlink.h b/include/linux/rtnetlink.h
index bbad657a372..27576aa05e8 100644
--- a/include/linux/rtnetlink.h
+++ b/include/linux/rtnetlink.h
@@ -758,8 +758,7 @@ extern int lockdep_rtnl_is_held(void);
* or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference()
*/
#define rcu_dereference_rtnl(p) \
- rcu_dereference_check(p, rcu_read_lock_held() || \
- lockdep_rtnl_is_held())
+ rcu_dereference_check(p, lockdep_rtnl_is_held())
/**
* rtnl_dereference - fetch RCU pointer when updates are prevented by RTNL