lkml.org 
[lkml]   [2006]   [Jan]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [linux-pm] [RFC/RFT][PATCH -mm 2/5] swsusp: userland interface (rev. 2)
    Hi!

    > > +static int __init snapshot_dev_init(void)
    > > +{
    > > + int error;
    > > +
    > > + error = alloc_chrdev_region(&interface.devno, 0, 1, interface.name);
    > > + if (error)
    > > + return error;
    > > + cdev_init(&interface.cdev, &snapshot_fops);
    > > + interface.cdev.ops = &snapshot_fops;
    > > + error = cdev_add(&interface.cdev, interface.devno, 1);
    > > + if (error)
    > > + goto Unregister;
    > > + error = sysfs_create_file(&power_subsys.kset.kobj, &snapshot_attr.attr);
    >
    > Heh, that's a neat hack, register a sysfs file that contains the
    > major:minor (there is a function that will print that the correct way,
    > if you really want to do that), in sysfs. It's better to just register
    > a misc character device with the name "snapshot", and then udev will
    > create your userspace node with the proper major:minor all automatically
    > for you.
    >
    > Unless you want to turn these into syscalls :)

    Well, I think we simply want to get static major/minor allocated for
    this device. It really uses read/write, IIRC, so no, I do not think we
    want to make it a syscall.
    Pavel

    --
    Thanks, Sharp!
    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2006-01-05 01:23    [W:0.020 / U:2.356 seconds]
    ©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site