vkr: refactor queue sync thread
This change does:
- ensure list is initialized before queue thread start
- signal cond with mutex locked for better sched
- use list_first_entry instead of poking next
Signed-off-by: Yiwei Zhang zzyiwei@chromium.org
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This change does:
Signed-off-by: Yiwei Zhang zzyiwei@chromium.org