On 5/22/07, Pierre Ossman <[email protected]> wrote:
Kay Sievers wrote:
> We could change the driver-core to suppress the creation of an attribute
> if the attribute's show() or store() method returns something like
> -ENOENT at registration time?
> The driver would pass _all_ possible attributes of the device at
> registration time, but the core would only create the attributes which
> are implemented for this particular device? Would that work for you?
>
Not sure. Not in an obvious way at least.
It also doesn't feel like "the kernel way". Generally you can
create/allocate an object, assign attributes to it, then activate it.
Couldn't it be done so that I can add sysfs stuff to a device after I
just initialized it? (but before I add it).
I agree here - if it was just possible to do this between create and
add, this discussion would be moot.
> You can assign any number of attribute groups to the device. If they
> don't have a group name, they will all be created directly at the device
> level. Would that work for you?
I've had a look at sysfs groups and the biggest beef I have with those
is that they're too low level. In order to use them I first need to
create device attributes, then create an array of pointers to each attr
member. It would be nice if I could just feed an array of device
attributes (i.e. I want wrappers).
I did a little helper struct for the firewire subsystem that might be
useful on a more general level. It's struct fw_attribute_group in
drivers/firewire/fw-device.h and the implementation is
init_fw_attribute_group in drivers/firewire/fw-device.c. But I agree,
attribute groups require a fair bit of boiler plate code.
cheers,
Kristian
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]