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    SubjectRe: [PATCH 2/9] PM: suspend_block: Add driver to access suspend blockers from user-space
    On Fri, Apr 23, 2010 at 10:43:49AM +0200, Pavel Machek wrote:
    > > +To create a suspend_blocker from user-space, open the suspend_blocker device:
    > > + fd = open("/dev/suspend_blocker", O_RDWR | O_CLOEXEC);
    > > +then call:
    > > + ioctl(fd, SUSPEND_BLOCKER_IOCTL_INIT(strlen(name)), name);
    >
    >
    > This seems like very wrong idea -- it uses different ioctl number for
    > each length AFAICT.

    Yep, and there's nothing wrong with that IMHO. It's a clever use of
    the _IOC encoding scheme.

    - Ted


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