On 27 September 2026 11:03:59 BST, Kunwu Chan <[email protected]> wrote: >Add support for scaling atomic SRCU grace periods using >srcu_read_lock_atomic()/srcu_read_unlock_atomic() and >synchronize_srcu_atomic(). >
Ummm. Ok then! Reviewed-by: Bradley Morgan <[email protected]> >Signed-off-by: Kunwu Chan <[email protected]> >--- > kernel/rcu/rcuscale.c | 47 ++++++++++++++++++++++++++++++++++++++++++- > 1 file changed, 46 insertions(+), 1 deletion(-) > >diff --git a/kernel/rcu/rcuscale.c b/kernel/rcu/rcuscale.c >index 5aca31c3c01d..86f1a912ebee 100644 >--- a/kernel/rcu/rcuscale.c >+++ b/kernel/rcu/rcuscale.c >@@ -264,6 +264,51 @@ static struct rcu_scale_ops srcu_ops = { > .name = "srcu" > }; > >+static struct srcu_struct srcu_atomic_ctlp; >+ >+static int srcu_scale_atomic_read_lock(void) >+{ >+ return srcu_read_lock_atomic(&srcu_atomic_ctlp); >+} >+ >+static void srcu_scale_atomic_read_unlock(int idx) >+{ >+ srcu_read_unlock_atomic(&srcu_atomic_ctlp, idx); >+} >+ >+static void srcu_scale_atomic_synchronize(void) >+{ >+ synchronize_srcu_atomic(&srcu_atomic_ctlp); >+} >+ >+static void srcu_atomic_scale_init(void) >+{ >+ init_srcu_struct_atomic(&srcu_atomic_ctlp); >+} >+ >+static void srcu_atomic_scale_cleanup(void) >+{ >+ cleanup_srcu_struct(&srcu_atomic_ctlp); >+} >+ >+static unsigned long srcu_atomic_scale_completed(void) >+{ >+ return srcu_batches_completed(&srcu_atomic_ctlp); >+} >+ >+static struct rcu_scale_ops srcu_atomic_ops = { >+ .ptype = SRCU_FLAVOR, >+ .init = srcu_atomic_scale_init, >+ .cleanup = srcu_atomic_scale_cleanup, >+ .readlock = srcu_scale_atomic_read_lock, >+ .readunlock = srcu_scale_atomic_read_unlock, >+ .get_gp_seq = srcu_atomic_scale_completed, >+ .gp_diff = rcu_seq_diff, >+ .exp_completed = srcu_atomic_scale_completed, >+ .sync = srcu_scale_atomic_synchronize, >+ .name = "srcu_atomic" >+}; >+ > static struct srcu_struct srcud; > > static void srcu_sync_scale_init(void) >@@ -1176,7 +1221,7 @@ rcu_scale_init(void) > long i; > long j; > static struct rcu_scale_ops *scale_ops[] = { >- &rcu_ops, &srcu_ops, &srcud_ops, >+ &rcu_ops, &srcu_ops, &srcu_atomic_ops, &srcud_ops, > TASKS_OPS TASKS_RUDE_OPS TASKS_TRACING_OPS > HAZPTR_SCALE_OPS > }; > --- Thanks! "I'm not a very positive person" - Linus torvalds
