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| author |   Zhouyi Zhou <zhouzhouyi@gmail.com> | 2021-08-11 10:59:20 +0800 |
|---|---|---|
| committer |   Peter Zijlstra <peterz@infradead.org> | 2021-09-17 15:08:45 +0200 |
| commit | a2e05ddda11b0bd529f443df9089ab498b2c2642 (patch) | |
| tree | 1d18744704caec3368ffa700a8fe2fd9b87df599 /kernel/rcu | |
| parent | lockdep: Let lock_is_held_type() detect recursive read as read (diff) | |
| download | linux-dev-a2e05ddda11b0bd529f443df9089ab498b2c2642.tar.xz linux-dev-a2e05ddda11b0bd529f443df9089ab498b2c2642.zip | |
lockdep: Improve comments in wait-type checks
Comments in wait-type checks be improved by mentioning the
PREEPT_RT kernel configure option.
Signed-off-by: Zhouyi Zhou <zhouzhouyi@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Paul E. McKenney <paulmck@kernel.org>
Link: https://lkml.kernel.org/r/20210811025920.20751-1-zhouzhouyi@gmail.com
Diffstat (limited to 'kernel/rcu')
| -rw-r--r-- | kernel/rcu/update.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/rcu/update.c b/kernel/rcu/update.c index c21b38cc25e9..690b0cec7459 100644 --- a/kernel/rcu/update.c +++ b/kernel/rcu/update.c @@ -247,7 +247,7 @@ struct lockdep_map rcu_lock_map = { .name = "rcu_read_lock", .key = &rcu_lock_key, .wait_type_outer = LD_WAIT_FREE, - .wait_type_inner = LD_WAIT_CONFIG, /* XXX PREEMPT_RCU ? */ + .wait_type_inner = LD_WAIT_CONFIG, /* PREEMPT_RT implies PREEMPT_RCU */ }; EXPORT_SYMBOL_GPL(rcu_lock_map); @@ -256,7 +256,7 @@ struct lockdep_map rcu_bh_lock_map = { .name = "rcu_read_lock_bh", .key = &rcu_bh_lock_key, .wait_type_outer = LD_WAIT_FREE, - .wait_type_inner = LD_WAIT_CONFIG, /* PREEMPT_LOCK also makes BH preemptible */ + .wait_type_inner = LD_WAIT_CONFIG, /* PREEMPT_RT makes BH preemptible. */ }; EXPORT_SYMBOL_GPL(rcu_bh_lock_map); |