The following commit has been merged into the perf/urgent branch of tip:
Commit-ID: 3a85969e9d912d5dd85362ee37b5f81266e00e77
Gitweb: https://git.kernel.org/tip/3a85969e9d912d5dd85362ee37b5f81266e00e77
Author: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>
AuthorDate: Sun, 21 Mar 2021 15:49:13 +09:00
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitterDate: Sun, 21 Mar 2021 11:59:57 +01:00
lockdep: Add a missing initialization hint to the "INFO: Trying to register non-static key" message
Since this message is printed when dynamically allocated spinlocks (e.g.
kzalloc()) are used without initialization (e.g. spin_lock_init()),
suggest to developers to check whether initialization functions for objects
were called, before making developers wonder what annotation is missing.
[ mingo: Minor tweaks to the message. ]
Signed-off-by: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20210321064913.4619-1-penguin-kernel@xxxxxxxxxxxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
kernel/locking/lockdep.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index c6d0c1d..c30eb88 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -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;
|