linux-kernel - [PATCH 1/4] rcu: Provide a static initializer for hlist_nulls

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Message-ID: <20250203150525.456525-2-bigeasy@linutronix.de>
Date: Mon,  3 Feb 2025 16:05:22 +0100
From: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To: linux-kernel@...r.kernel.org,
	rcu@...r.kernel.org
Cc: Andrew Morton <akpm@...ux-foundation.org>,
	MengEn Sun <mengensun@...cent.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	YueHong Wu <yuehongwu@...cent.com>,
	"Paul E. McKenney" <paulmck@...nel.org>,
	Joel Fernandes <joel@...lfernandes.org>,
	Josh Triplett <josh@...htriplett.org>,
	Boqun Feng <boqun.feng@...il.com>,
	Uladzislau Rezki <urezki@...il.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Lai Jiangshan <jiangshanlai@...il.com>,
	Zqiang <qiang.zhang1211@...il.com>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Subject: [PATCH 1/4] rcu: Provide a static initializer for hlist_nulls_head.

Provide a static initializer for hlist_nulls_head so that it can be used
in statically defined data structures.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
---
 include/linux/list_nulls.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/linux/list_nulls.h b/include/linux/list_nulls.h
index fa6e8471bd227..248db9b77ee24 100644
--- a/include/linux/list_nulls.h
+++ b/include/linux/list_nulls.h
@@ -28,6 +28,7 @@ struct hlist_nulls_node {
 #define NULLS_MARKER(value) (1UL | (((long)value) << 1))
 #define INIT_HLIST_NULLS_HEAD(ptr, nulls) \
 	((ptr)->first = (struct hlist_nulls_node *) NULLS_MARKER(nulls))
+#define HLIST_NULLS_HEAD_INIT(nulls) {.first = (struct hlist_nulls_node *)NULLS_MARKER(nulls)}
 
 #define hlist_nulls_entry(ptr, type, member) container_of(ptr,type,member)
 
-- 
2.47.2