sched/sem_rw: convert read-lock to write-lock when self already holds write-lock #13797

… a write-lock If the write lock is already held by oneself and sine the write lock can be recursively held, so, this operation can be converted to a write lock to avoid deadlock. Signed-off-by: dongjiuzhu1 <[email protected]>

inode_find don't need to modify inode tree Signed-off-by: dongjiuzhu1 <[email protected]>