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| author | Frederic Weisbecker <frederic@kernel.org> | 2020-11-13 13:13:23 +0100 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2021-01-07 01:24:59 +0100 |
| commit | 69cdea873cde261586a2cae2440178df1a313bbe (patch) | |
| tree | 2d8d8b7c06c6654eee14de2aa0e72de3aaee6aaa /kernel/rcu/tree.h | |
| parent | rcu/nocb: Re-offload support (diff) | |
| download | linux-69cdea873cde261586a2cae2440178df1a313bbe.tar.xz linux-69cdea873cde261586a2cae2440178df1a313bbe.zip | |
rcu/nocb: Shutdown nocb timer on de-offloading
This commit ensures that the nocb timer is shut down before reaching the
final de-offloaded state. The key goal is to prevent the timer handler
from manipulating the callbacks without the protection of the nocb locks.
Cc: Josh Triplett <josh@joshtriplett.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Lai Jiangshan <jiangshanlai@gmail.com>
Cc: Joel Fernandes <joel@joelfernandes.org>
Cc: Neeraj Upadhyay <neeraju@codeaurora.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Inspired-by: Paul E. McKenney <paulmck@kernel.org>
Tested-by: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'kernel/rcu/tree.h')
| -rw-r--r-- | kernel/rcu/tree.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h index e0deb4829847..5d359b9f9fec 100644 --- a/kernel/rcu/tree.h +++ b/kernel/rcu/tree.h @@ -257,6 +257,7 @@ struct rcu_data { }; /* Values for nocb_defer_wakeup field in struct rcu_data. */ +#define RCU_NOCB_WAKE_OFF -1 #define RCU_NOCB_WAKE_NOT 0 #define RCU_NOCB_WAKE 1 #define RCU_NOCB_WAKE_FORCE 2 |