so the lower half driver don't need include the specific board.h
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
Change-Id: I2ff5c30049a5c5e8ee90baea56e9f4cb1a8a4f87
* Simplify EINTR/ECANCEL error handling
1. Add semaphore uninterruptible wait function
2 .Replace semaphore wait loop with a single uninterruptible wait
3. Replace all sem_xxx to nxsem_xxx
* Unify the void cast usage
1. Remove void cast for function because many place ignore the returned value witout cast
2. Replace void cast for variable with UNUSED macro
