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For example, task is blocked by nxsem_wait(sem1), use nxsem_wait(sem2) in signal handler, and take sem2 successfully, after exit from signal handler to task, nxsem_wait(sem1) returns OK, but the correct result should be -EINTR. Signed-off-by: Zeng Zhaoxiu <zhaoxiu.zeng@gmail.com>