On Thu, Jan 14, 2016 at 05:14:47PM -0800, Stefan Agner wrote:
> On a slightly other topic, I question whether REGCACHE_RBTREE is the
> right cache type for the DCU DRM driver. The driver has uses a regmap
> area of 1144 32-bit registers, the most space is used by the layer
> configuration register
On Fri, Jan 15, 2016 at 10:45:41AM +0100, Peter Zijlstra wrote:
> So _regmap_write() does: map->lock(map->lock_arg)
> Which isn't very enlightening, since that can be a mutex or a spinlock,
> the above strongly suggests spinlock though.
> Looking at __regmap_init(), this seems to depend on:
>
On 2016-01-15 08:28, Mark Brown wrote:
> On Thu, Jan 14, 2016 at 05:14:47PM -0800, Stefan Agner wrote:
>
>> On a slightly other topic, I question whether REGCACHE_RBTREE is the
>> right cache type for the DCU DRM driver. The driver has uses a regmap
>> area of 1144 32-bit registers, the most space
On Thu, Jan 14, 2016 at 02:30:50PM -0800, Stefan Agner wrote:
> Hi Mark,
>
> I currently work on the DCU DRM driver (drivers/gpu/drm/fsl-dcu/) on a
> Linux 4.4 kernel. With CONFIG_LOCKDEP enabled I get the following
> warning on startup:
>
> [1.327284] [ cut here ]
> [
On Thu, Jan 14, 2016 at 02:30:50PM -0800, Stefan Agner wrote:
> I currently work on the DCU DRM driver (drivers/gpu/drm/fsl-dcu/) on a
> Linux 4.4 kernel. With CONFIG_LOCKDEP enabled I get the following
> warning on startup:
Please don't paste entire stack dumps into e-mail, they're completely
un
On 2016-01-14 16:01, Mark Brown wrote:
> On Thu, Jan 14, 2016 at 02:30:50PM -0800, Stefan Agner wrote:
>
>> I currently work on the DCU DRM driver (drivers/gpu/drm/fsl-dcu/) on a
>> Linux 4.4 kernel. With CONFIG_LOCKDEP enabled I get the following
>> warning on startup:
>
> Please don't paste ent
Hi Mark,
I currently work on the DCU DRM driver (drivers/gpu/drm/fsl-dcu/) on a
Linux 4.4 kernel. With CONFIG_LOCKDEP enabled I get the following
warning on startup:
[1.327284] [ cut here ]
[1.332010] WARNING: CPU: 0 PID: 1 at kernel/locking/lockdep.c:2755
lockdep_
