if(down_interruptible(&dev->sem)) return -ERESTARTSYS; dev->sem is a semaphore used to implement mutual exclusion. What do these two lines of code mean? Because down_interruptible normally returns 0,
Error[e104]: Failed to fit all segments into specified ranges. Problem discovered in segment CODE. Unable to place 77 block(s) (0x1cec byte(s) total) in 0x754 byte(s) ofmemory. The problem occurred wh