diff options
| author | Paul E. McKenney <paulmck@kernel.org> | 2025-11-05 12:32:04 -0800 |
|---|---|---|
| committer | Frederic Weisbecker <frederic@kernel.org> | 2025-11-05 23:58:20 +0100 |
| commit | ee90848499b169070dbf85a4276a45ccbb7ff7d3 (patch) | |
| tree | bcc2d628c080e85e4634eb080b01d418c98a7134 /include/linux/notifier.h | |
| parent | 950063c6e89736c3f5a5072f9e1ef98646a46a3a (diff) | |
srcu: Create a DEFINE_SRCU_FAST()
This commit creates DEFINE_SRCU_FAST() and DEFINE_STATIC_SRCU_FAST()
macros that are similar to DEFINE_SRCU() and DEFINE_STATIC_SRCU(),
but which create srcu_struct structures that are usable only by readers
initiated by srcu_read_lock_fast() and friends.
This commit does make DEFINE_SRCU_FAST() available to modules, in which
case the per-CPU srcu_data structures are not created at compile time, but
rather at module-load time. This means that the >srcu_reader_flavor field
of the srcu_data structure is not available. Therefore,
this commit instead creates an ->srcu_reader_flavor field in the
srcu_struct structure, adds arguments to the DEFINE_SRCU()-related
macros to initialize this new field, and extends the checks in the
__srcu_check_read_flavor() function to include this new field.
This commit also allows dynamically allocated srcu_struct structure
to be marked for SRCU-fast readers. It does so by defining a new
init_srcu_struct_fast() function that marks the specified srcu_struct
structure for use by srcu_read_lock_fast() and friends.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: <bpf@vger.kernel.org>
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Diffstat (limited to 'include/linux/notifier.h')
| -rw-r--r-- | include/linux/notifier.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/notifier.h b/include/linux/notifier.h index b42e64734968..01b6c9d9956f 100644 --- a/include/linux/notifier.h +++ b/include/linux/notifier.h @@ -109,7 +109,7 @@ extern void srcu_init_notifier_head(struct srcu_notifier_head *nh); .mutex = __MUTEX_INITIALIZER(name.mutex), \ .head = NULL, \ .srcuu = __SRCU_USAGE_INIT(name.srcuu), \ - .srcu = __SRCU_STRUCT_INIT(name.srcu, name.srcuu, pcpu), \ + .srcu = __SRCU_STRUCT_INIT(name.srcu, name.srcuu, pcpu, 0), \ } #define ATOMIC_NOTIFIER_HEAD(name) \ |