summaryrefslogtreecommitdiff
path: root/Documentation/RCU/lockdep.rst
diff options
context:
space:
mode:
authorPaul E. McKenney <paulmck@kernel.org>2022-10-18 18:33:59 +0300
committerPaul E. McKenney <paulmck@kernel.org>2022-10-20 21:57:46 +0300
commit2c3cdf5a8e06723b6ec76f04534fe1a33dd1a6d8 (patch)
treee03f65de020d93af24a68e7f497917683df44a95 /Documentation/RCU/lockdep.rst
parent06e6d1d6fdc0a7ae48e24f586632ee950249a935 (diff)
downloadlinux-2c3cdf5a8e06723b6ec76f04534fe1a33dd1a6d8.tar.xz
doc: Update RCU's lockdep.rst
This commit adds a couple of new functions to the documentation. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'Documentation/RCU/lockdep.rst')
-rw-r--r--Documentation/RCU/lockdep.rst4
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/RCU/lockdep.rst b/Documentation/RCU/lockdep.rst
index a94f55991a71..9308f1bdba05 100644
--- a/Documentation/RCU/lockdep.rst
+++ b/Documentation/RCU/lockdep.rst
@@ -17,7 +17,9 @@ state::
rcu_read_lock_held() for normal RCU.
rcu_read_lock_bh_held() for RCU-bh.
rcu_read_lock_sched_held() for RCU-sched.
+ rcu_read_lock_any_held() for any of normal RCU, RCU-bh, and RCU-sched.
srcu_read_lock_held() for SRCU.
+ rcu_read_lock_trace_held() for RCU Tasks Trace.
These functions are conservative, and will therefore return 1 if they
aren't certain (for example, if CONFIG_DEBUG_LOCK_ALLOC is not set).
@@ -53,6 +55,8 @@ checking of rcu_dereference() primitives:
is invoked by both SRCU readers and updaters.
rcu_dereference_raw(p):
Don't check. (Use sparingly, if at all.)
+ rcu_dereference_raw_check(p):
+ Don't do lockdep at all. (Use sparingly, if at all.)
rcu_dereference_protected(p, c):
Use explicit check expression "c", and omit all barriers
and compiler constraints. This is useful when the data