There are lots of functions in the Linux kernel that are declared as unsigned long, but the return value is negative integer while error occurred. An example of these functions is do_mmap_pgoff in mm/mmap.c, which is defined as:
unsigned long do_mmap_pgoff(....) In this function, it returns -ENODEV, -EPERM, -ENOMEM, -EINVAL, -EAGAIN, -EACCESS depends on the error type. My question is how should the caller perform error check based on the return value? Please CC reply to me at [EMAIL PROTECTED] Thanks, Dongliang Chen Staff Engineer EMS Technologies, Inc - Defense and Space Systems 660 Engineering Dr Norcross, GA 30092 Tel: 770-263-9200 x 4379 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
