On Fri, Apr 12, 2013 at 05:16:27PM -0400, Don Zickus wrote: > On Wed, Apr 10, 2013 at 08:10:41AM -0700, Guenter Roeck wrote: > > > have no idea how to even find out if multiple watchdogs are open on the > > > system. Is there a list I could walk? And with regard to 'watchdog is > > > > /* the dev_t structure to store the dynamically allocated watchdog devices */ > > static dev_t watchdog_devt; > > > > One way to look up the allocated watchdogs might be to loop through all kobj > > instances for the major device using kobj_lookup. Don't know if there is a > > better way. > > Hmm, I got around to poking at this today and I am not sure kobj_lookup > will work. Besides being surrounded with another mutex, I don't have > access to the character device domain to pass to kobj_lookup. > > Perhaps I am not reading the code right, but I can't find a good way > forward. > > The only other hack I can think of, is to embed a list object in the > watchdog structure and list_add each new register'd watchdog. Then it > would be trivial to walk the watchdog list. > After looking into it again, I agree. Maybe you can give it a try. At least other options look even more complicated (eg creating a watchdog class ?). Guenter
