Re: [PATCH] drm/i915/gvt: remove local storage of debugfs file

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On Wed, May 19, 2021 at 04:21:23PM +0800, Zhenyu Wang wrote:
> On 2021.05.19 10:31:18 +0200, Greg Kroah-Hartman wrote:
> > On Wed, May 19, 2021 at 04:03:13PM +0800, Zhenyu Wang wrote:
> > > On 2021.05.18 18:28:53 +0200, Greg Kroah-Hartman wrote:
> > > > On Tue, May 18, 2021 at 06:17:05PM +0200, Greg Kroah-Hartman wrote:
> > > > > There is no need to keep the dentry around for the debugfs kvmgt cache
> > > > > file, as we can just look it up when we want to remove it later on.
> > > > > Simplify the structure by removing the dentry and relying on debugfs
> > > > > to find the dentry to remove when we want to.
> > > > > 
> > > > > By doing this change, we remove the last in-kernel user that was storing
> > > > > the result of debugfs_create_long(), so that api can be cleaned up.
> > > > > 
> > > > > Cc: Zhenyu Wang <zhenyuw@xxxxxxxxxxxxxxx>
> > > > > Cc: Zhi Wang <zhi.a.wang@xxxxxxxxx>
> > > > > Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
> > > > > Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
> > > > > Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
> > > > > Cc: David Airlie <airlied@xxxxxxxx>
> > > > > Cc: Daniel Vetter <daniel@xxxxxxxx>
> > > > > Cc: intel-gvt-dev@xxxxxxxxxxxxxxxxxxxxx
> > > > > Cc: intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> > > > > Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
> > > > > Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> > > > > ---
> > > > >  drivers/gpu/drm/i915/gvt/kvmgt.c | 11 +++++------
> > > > >  1 file changed, 5 insertions(+), 6 deletions(-)
> > > > 
> > > > Note, I can take this through my debugfs tree if wanted, that way I can
> > > > clean up the debugfs_create_long() api at the same time.  Otherwise it's
> > > > fine, I can wait until next -rc1 for that to happen.
> > > > 
> > > 
> > > It's fine with me to go through debugfs tree. Just double check that recent
> > > kvmgt change would not cause conflict with this as well.
> > 
> > How can I check that?  I'll be glad to take this through my tree, we can
> > handle the merge issues later for 5.14-rc1 :)
> > 
> 
> Current kvmgt change in merge queue is just https://patchwork.freedesktop.org/patch/433536/?series=89995&rev=2
> It applies fine with debugfs change.

Thanks, I'll go take this through my tree now.

greg k-h



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