On Wed, Feb 15, 2023 at 06:14:23PM +0100, Christian König wrote:
Am 15.02.23 um 17:34 schrieb Sasha Levin:
This is a note to let you know that I've just added the patch titled
dma-buf: Add unlocked variant of vmapping functions
to the 6.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
dma-buf-add-unlocked-variant-of-vmapping-functions.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit a5b01b5f0c0e769850cb21d1a94f53e63a837b22
Author: Dmitry Osipenko <dmitry.osipenko@xxxxxxxxxxxxx>
Date: Mon Oct 17 20:22:09 2022 +0300
dma-buf: Add unlocked variant of vmapping functions
[ Upstream commit 56e5abba8c3ec5c6098007693f9cefafaa2aa010 ]
Add unlocked variant of dma_buf_vmap/vunmap() that will be utilized
by drivers that don't take the reservation lock explicitly.
Acked-by: Sumit Semwal <sumit.semwal@xxxxxxxxxx>
Acked-by: Christian König <christian.koenig@xxxxxxx>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@xxxxxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20221017172229.42269-2-dmitry.osipenko@xxxxxxxxxxxxx
Stable-dep-of: 85e26dd5100a ("drm/client: fix circular reference counting issue")
Do I get it right that this was just done as prerequisite for the
circular reference counting issues?
Yup.
If yes that's a pretty bad idea. This here is a new feature and
shouldn't be backported to older kernels and most likely doesn't work
correctly standalone.
Instead the 85e26dd5100a ("drm/client: fix circular reference counting
issue") patch should be adjusted to match the older kernels
interfaces.
I'm going to provide a proper backport if I can find time for it.
Ack, I'll drop this patch and the circular dependency fix, thanks!
--
Thanks,
Sasha
