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SubjectRe: 2.6: how do I this in sysfs?
On Mon, Aug 29, 2005 at 12:24:18PM -0500, Miller, Mike (OS Dev) wrote:
>
> > This is after my minimal sas transport class, please also
> > read the thread about it on linux-scsi
> >
> In the referenced code for using sysfs, there only appear to be methods
> for reading attributes. How about if we want to cause a command to
> get written out to the hardware? Do we do something like this?
>
> /* get a semaphore keep everyone else out while we're working,
> and hope like hell that all the other processes are playing
> nice and using the semaphore too, or else we're hosed. */
>
> get_some_kind_of_semaphore();

try flock() on the /sys/blah/blah/ directory. That should keep userspace happy.
I think it only takes a small sysfs patch to make this work (or it might work
today, don't remember, sorry...)

Or look into using configfs instead.

thanks,

greg k-h
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