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    SubjectRe: sparc/staging compile error
    On Thu, Nov 6, 2008 at 12:32 PM, Christoph Hellwig <hch@infradead.org> wrote:
    > On Thu, Nov 06, 2008 at 09:06:36AM -0500, J.R. Mauro wrote:
    >> static int poch_ioctl(struct inode *inode, struct file *filp,
    >> unsigned int cmd, unsigned long arg)
    >> {
    >> /* ---snip---*/
    >> case POCH_IOC_SYNC_GROUP_FOR_USER:
    >> case POCH_IOC_SYNC_GROUP_FOR_DEVICE:
    >> vms = find_vma(current->mm, arg);
    >> if (!vms)
    >> /* Address not mapped. */
    >> return -EINVAL;
    >> if (vms->vm_file != filp)
    >> /* Address mapped from different device/file. */
    >> return -EINVAL;
    >>
    >> flush_cache_range(vms, arg, arg + channel->group_size);
    >
    > This doesn't look like something a driver should ever do. Could someone
    > explain what it's trying to do from a high level point of view?
    >
    >

    CC'd driver maintainers mentioned in the README


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