Subject: Re: [PATCH 1/1] coresight: Fix DEBUG_LOCKS_WARN_ON for uninitialized attribute

From: Greg KH <[email-masked]>
Date: Thu, 1 Aug 2019 20:50:45 +0200

On Thu, Aug 01, 2019 at 11:23:23AM -0600, Mathieu Poirier wrote:
> From: Suzuki K Poulose <[email-masked]>
> 
> While running the linux-next with CONFIG_DEBUG_LOCKS_ALLOC enabled,
> I get the following splat.
> 
>  BUG: key ffffcb5636929298 has not been registered!
>  ------------[ cut here ]------------
>  DEBUG_LOCKS_WARN_ON(1)
>  WARNING: CPU: 1 PID: 53 at kernel/locking/lockdep.c:3669 lockdep_init_map+0x164/0x1f0
>  CPU: 1 PID: 53 Comm: kworker/1:1 Tainted: G        W         5.2.0-next-20190712-00015-g00ad4634222e-dirty #603
>  Workqueue: events amba_deferred_retry_func
>  pstate: 60c00005 (nZCv daif +PAN +UAO)
>  pc : lockdep_init_map+0x164/0x1f0
>  lr : lockdep_init_map+0x164/0x1f0
> 
>  [ trimmed ]
> 
>  Call trace:
>   lockdep_init_map+0x164/0x1f0
>   __kernfs_create_file+0x9c/0x158
>   sysfs_add_file_mode_ns+0xa8/0x1d0
>   sysfs_add_file_to_group+0x88/0xd8
>   etm_perf_add_symlink_sink+0xcc/0x138
>   coresight_register+0x110/0x280
>   tmc_probe+0x160/0x420
> 
>  [ trimmed ]
> 
>  ---[ end trace ab4cc669615ba1b0 ]---
> 
> Fix this by initialising the dynamically allocated attribute properly.
> 
> Cc: Mathieu Poirier <[email-masked]>
> Fixes: bb8e370bdc141ddf ("coresight: perf: Add "sinks" group to PMU directory")

That should be:
Fixes: bb8e370bdc14 ("coresight: perf: Add "sinks" group to PMU directory")

I can go fix it up...

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