linux-kernel - [GIT PULL] locking fixes

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Date:   Sun, 11 Apr 2021 14:14:53 +0200
From:   Ingo Molnar <mingo@...nel.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Will Deacon <will@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: [GIT PULL] locking fixes

Linus,

Please pull the latest locking/urgent git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git locking-urgent-2021-04-11

   # HEAD: 6d48b7912cc72275dc7c59ff961c8bac7ef66a92 lockdep: Address clang -Wformat warning printing for %hd

Two minor fixes: one for a Clang warning, the other improves an
ambiguous/confusing kernel log message.

 Thanks,

	Ingo

------------------>
Arnd Bergmann (1):
      lockdep: Address clang -Wformat warning printing for %hd

Tetsuo Handa (1):
      lockdep: Add a missing initialization hint to the "INFO: Trying to register non-static key" message


 kernel/locking/lockdep.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index c6d0c1dc6253..f160f1c97ca1 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -705,7 +705,7 @@ static void print_lock_name(struct lock_class *class)
 
 	printk(KERN_CONT " (");
 	__print_lock_name(class);
-	printk(KERN_CONT "){%s}-{%hd:%hd}", usage,
+	printk(KERN_CONT "){%s}-{%d:%d}", usage,
 			class->wait_type_outer ?: class->wait_type_inner,
 			class->wait_type_inner);
 }
@@ -930,7 +930,8 @@ static bool assign_lock_key(struct lockdep_map *lock)
 		/* Debug-check: all keys must be persistent! */
 		debug_locks_off();
 		pr_err("INFO: trying to register non-static key.\n");
-		pr_err("the code is fine but needs lockdep annotation.\n");
+		pr_err("The code is fine but needs lockdep annotation, or maybe\n");
+		pr_err("you didn't initialize this object before use?\n");
 		pr_err("turning off the locking correctness validator.\n");
 		dump_stack();
 		return false;