[lkml]   [2007]   [Mar]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [RFD driver-core] Lifetime problems of the current driver model
Cornelia Huck wrote:
> On Sat, 31 Mar 2007 12:12:48 +0900,
> Tejun Heo <> wrote:
>>> Hm, but as long as dk0 is registered, it can be looked up and someone
>>> could get a reference on it.
>> Yeah, exactly. That's why any getting any kobject reference backed by a
>> module must be accompanied by try_module_get().
>> int mydrv_get_dk(struct dk *dk)
>> {
>> rc = try_module_get(mydrv);
>> if (rc)
>> return rc;
>> kobject_get(&dk->kobj);
>> return 0;
>> }
> This works if the caller always knows which module to grab (I was
> thinking about some tree-walking code).

Yeah, that's why we have so many ->owner's and getting it wrong results
in jumping to non-existent address.

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2007-03-31 18:17    [W:0.031 / U:6.140 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site