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| author | Chris Wilson <[email protected]> | 2019-08-15 20:57:08 +0000 |
|---|---|---|
| committer | Chris Wilson <[email protected]> | 2019-08-15 22:21:13 +0000 |
| commit | ccb23d2dcc300d3fa176de654610ea82f635915d (patch) | |
| tree | c77c3f9c88b5960c5961ecd379d9f9682be2ad6a /drivers/gpu/drm/i915/display/intel_frontbuffer.c | |
| parent | drm/i915/gt: Convert timeline tracking to spinlock (diff) | |
| download | kernel-ccb23d2dcc300d3fa176de654610ea82f635915d.tar.gz kernel-ccb23d2dcc300d3fa176de654610ea82f635915d.zip | |
drm/i915/gt: Guard timeline pinning without relying on struct_mutex
In preparation for removing struct_mutex from around context retirement,
we need to make timeline pinning and unpinning safe. Since multiple
engines/contexts can share a single timeline, we cannot rely on
borrowing the context mutex (otherwise we could state that the timeline
is only pinned/unpinned inside the context pin/unpin and so guarded by
it). However, we only perform a sequence of atomic operations inside the
timeline pin/unpin and the sequence of those operations is safe for a
concurrent unpin / pin, so we can relax the struct_mutex requirement.
Signed-off-by: Chris Wilson <[email protected]>
Reviewed-by: Matthew Auld <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_frontbuffer.c')
0 files changed, 0 insertions, 0 deletions