[openib-general] Re: [PATCH 8 of 20] ipath - sysfs support for core driver

[Bryan O'Sullivan]

On Thu, 2006-03-09 at 15:18 -0800, Roland Dreier wrote:
>  > +static ssize_t show_version(struct device_driver *dev, char *buf)
>  > +{
>  > +	return scnprintf(buf, PAGE_SIZE, "%s", ipath_core_version);
>  > +}
> 
> Any reason you left a "\n" off of this attribute?

Nope, just a bogon.

>  > +static ssize_t show_atomic_stats(struct device_driver *dev, char *buf)
>  > +{
>  > +	memcpy(buf, &ipath_stats, sizeof(ipath_stats));
>  > +
>  > +	return sizeof(ipath_stats);
>  > +}
> 
> I think putting a whole binary struct in a sysfs attribute is
> considered a no-no.

Grumble.  it's a fairly small struct, much less than a page in length,
and userspace needs an atomic view of it, instead of reading each of the
umpteen broken-out files that we also provide for humean-readable access
to each counter.

I didn't see any point to implementing the sysfs binary file interface
in order to do exactly what this 6-line function does.  Still don't, in
fact :-)

> Another missing "\n"

Thanks.

	<b