drm/i915: Removing polling for struct_mutex from vmap shrinker
The wait-for-idle used from within the shrinker_lock_uninterruptible depends on the struct_mutex locking state being known and declared to i915_request_wait(). As it is conceivable that we reach the vmap notifier from underneath struct_mutex (and so keep on relying on the mutex_trylock_recursive), we should not blindly call i915_request_wait. In the process we can remove the dubious polling to acquire struct_mutex, and simply act, or not, on a successful trylock. Signed-off-by:Chris Wilson <chris@chris-wilson.co.uk> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Reviewed-by:
Tvrtko Ursulin <tvrtko.ursulin@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190109164204.23935-2-chris@chris-wilson.co.uk
parent
3824e419
Please register or sign in to comment