Thread (596 messages) 596 messages, 13 authors, 2022-07-31
STALE1428d

[PATCH 5.10 174/575] locking/lockdep: Avoid RCU-induced noinstr fail

From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2021-11-15 19:27:39
Also in: lkml
Subsystem: locking primitives, the rest · Maintainers: Peter Zijlstra, Ingo Molnar, Will Deacon, Boqun Feng, Linus Torvalds

From: Peter Zijlstra <peterz@infradead.org>

[ Upstream commit ce0b9c805dd66d5e49fd53ec5415ae398f4c56e6 ]

vmlinux.o: warning: objtool: look_up_lock_class()+0xc7: call to rcu_read_lock_any_held() leaves .noinstr.text section

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210624095148.311980536@infradead.org (local)
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 kernel/locking/lockdep.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index 5184f68968158..2823329143503 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -887,7 +887,7 @@ look_up_lock_class(const struct lockdep_map *lock, unsigned int subclass)
 	if (DEBUG_LOCKS_WARN_ON(!irqs_disabled()))
 		return NULL;
 
-	hlist_for_each_entry_rcu(class, hash_head, hash_entry) {
+	hlist_for_each_entry_rcu_notrace(class, hash_head, hash_entry) {
 		if (class->key == key) {
 			/*
 			 * Huh! same key, different name? Did someone trample
-- 
2.33.0


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