linux-kernel - [tip: objtool/core] locking/lockdep: Avoid RCU-induced noinstr fail

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Message-ID: <163172096674.25758.986050044326739617.tip-bot2@tip-bot2>
Date:   Wed, 15 Sep 2021 15:49:26 -0000
From:   "tip-bot2 for Peter Zijlstra" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     "Peter Zijlstra (Intel)" <peterz@...radead.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: objtool/core] locking/lockdep: Avoid RCU-induced noinstr fail

The following commit has been merged into the objtool/core branch of tip:

Commit-ID:     ce0b9c805dd66d5e49fd53ec5415ae398f4c56e6
Gitweb:        https://git.kernel.org/tip/ce0b9c805dd66d5e49fd53ec5415ae398f4c56e6
Author:        Peter Zijlstra <peterz@...radead.org>
AuthorDate:    Thu, 24 Jun 2021 11:41:10 +02:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Wed, 15 Sep 2021 15:51:47 +02:00

locking/lockdep: Avoid RCU-induced noinstr fail

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@...radead.org>
Link: https://lore.kernel.org/r/20210624095148.311980536@infradead.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 bf1c00c..8a50967 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -888,7 +888,7 @@ 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