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authorJoel Fernandes (Google) <joel@joelfernandes.org>2019-07-16 18:12:22 -0400
committerPaul E. McKenney <paulmck@linux.ibm.com>2019-08-09 11:00:35 -0700
commit28875945ba98d1b47a8a706812b6494d165bb0a0 (patch)
treea167811c3e2dfe5de312c187085ed53f21faf831 /include/linux/rcupdate.h
parent9147089bee3a6b504821dd8462e2be229e6dbfae (diff)
rcu: Add support for consolidated-RCU reader checking
This commit adds RCU-reader checks to list_for_each_entry_rcu() and hlist_for_each_entry_rcu(). These checks are optional, and are indicated by a lockdep expression passed to a new optional argument to these two macros. If this optional lockdep expression is omitted, these two macros act as before, checking for an RCU read-side critical section. Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org> [ paulmck: Update to eliminate return within macro and update comment. ] Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>
Diffstat (limited to 'include/linux/rcupdate.h')
-rw-r--r--include/linux/rcupdate.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index bfcafbc1e301..80d6056f5855 100644
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -221,6 +221,7 @@ int debug_lockdep_rcu_enabled(void);
int rcu_read_lock_held(void);
int rcu_read_lock_bh_held(void);
int rcu_read_lock_sched_held(void);
+int rcu_read_lock_any_held(void);
#else /* #ifdef CONFIG_DEBUG_LOCK_ALLOC */
@@ -241,6 +242,12 @@ static inline int rcu_read_lock_sched_held(void)
{
return !preemptible();
}
+
+static inline int rcu_read_lock_any_held(void)
+{
+ return !preemptible();
+}
+
#endif /* #else #ifdef CONFIG_DEBUG_LOCK_ALLOC */
#ifdef CONFIG_PROVE_RCU