Re: sparc/staging compile error

[J.R. Mauro]

On Thu, Nov 6, 2008 at 12:32 PM, Christoph Hellwig <hch@xxxxxxxxxxxxx> 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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/