Messages in this thread Patch in this message | | | From | Sasha Levin <> | Subject | [PATCH AUTOSEL 6.1 14/29] misc: open-dice: Fix spurious lockdep warning | Date | Wed, 7 Feb 2024 16:24:39 -0500 |
| |
From: Will Deacon <will@kernel.org>
[ Upstream commit ac9762a74c7ca7cbfcb4c65f5871373653a046ac ]
When probing the open-dice driver with PROVE_LOCKING=y, lockdep complains that the mutex in 'drvdata->lock' has a non-static key:
| INFO: trying to register non-static key. | The code is fine but needs lockdep annotation, or maybe | you didn't initialize this object before use? | turning off the locking correctness validator.
Fix the problem by initialising the mutex memory with mutex_init() instead of __MUTEX_INITIALIZER().
Cc: Arnd Bergmann <arnd@arndb.de> Cc: David Brazdil <dbrazdil@google.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Will Deacon <will@kernel.org> Link: https://lore.kernel.org/r/20240126152410.10148-1-will@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/misc/open-dice.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/misc/open-dice.c b/drivers/misc/open-dice.c index c61be3404c6f..504b836a7abf 100644 --- a/drivers/misc/open-dice.c +++ b/drivers/misc/open-dice.c @@ -142,7 +142,6 @@ static int __init open_dice_probe(struct platform_device *pdev) return -ENOMEM; *drvdata = (struct open_dice_drvdata){ - .lock = __MUTEX_INITIALIZER(drvdata->lock), .rmem = rmem, .misc = (struct miscdevice){ .parent = dev, @@ -152,6 +151,7 @@ static int __init open_dice_probe(struct platform_device *pdev) .mode = 0600, }, }; + mutex_init(&drvdata->lock); /* Index overflow check not needed, misc_register() will fail. */ snprintf(drvdata->name, sizeof(drvdata->name), DRIVER_NAME"%u", dev_idx++); -- 2.43.0
| |