The following commit has been merged into the perf/core branch of tip:
Commit-ID: fa8a2d55139fb2e0b09e68c34b730adac92d18d6
Gitweb: https://git.kernel.org/tip/fa8a2d55139fb2e0b09e68c34b730adac92d18d6
Author: Puranjay Mohan <puranjay@kernel.org>
AuthorDate: Mon, 06 Jul 2026 10:27:41 -07:00
Committer: Peter Zijlstra <peterz@infradead.org>
CommitterDate: Mon, 03 Aug 2026 10:09:08 +02:00
srcu: Add lock guard for srcu_fast_updown flavor
Add a guard(srcu_fast_updown) definition for scoped
SRCU-fast-updown read-side critical sections, following the
existing pattern of guard(srcu) and guard(srcu_fast).
Signed-off-by: Puranjay Mohan <puranjay@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Paul E. McKenney <paulmck@kernel.org>
Reviewed-by: Oleg Nesterov <oleg@redhat.com>
Link: https://patch.msgid.link/20260706172744.3920417-2-puranjay@kernel.org
---
include/linux/srcu.h | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/include/linux/srcu.h b/include/linux/srcu.h
index a54ce9e..72c86d3 100644
--- a/include/linux/srcu.h
+++ b/include/linux/srcu.h
@@ -638,4 +638,11 @@ DEFINE_LOCK_GUARD_1(srcu_fast_notrace, struct srcu_struct,
DECLARE_LOCK_GUARD_1_ATTRS(srcu_fast_notrace, __acquires_shared(_T), __releases_shared(*(struct srcu_struct **)_T))
#define class_srcu_fast_notrace_constructor(_T) WITH_LOCK_GUARD_1_ATTRS(srcu_fast_notrace, _T)
+DEFINE_LOCK_GUARD_1(srcu_fast_updown, struct srcu_struct,
+ _T->scp = srcu_read_lock_fast_updown(_T->lock),
+ srcu_read_unlock_fast_updown(_T->lock, _T->scp),
+ struct srcu_ctr __percpu *scp)
+DECLARE_LOCK_GUARD_1_ATTRS(srcu_fast_updown, __acquires_shared(_T), __releases_shared(*(struct srcu_struct **)_T))
+#define class_srcu_fast_updown_constructor(_T) WITH_LOCK_GUARD_1_ATTRS(srcu_fast_updown, _T)
+
#endif