Documentation/credentials.txt

["Serge E. Hallyn" <serue@us.ibm.com>]

Hi,

In the section 'ACCESSING ANOTHER TASK'S CREDENTIALS', the file
Documentation/credentials.txt says:

> A function need not get RCU read lock to use __task_cred() if it is holding a
> spinlock at the time as this implicitly holds the RCU read lock.

AIUI, that is not actually right any more, is it?  A spinlock does not
suffice as it does not necessarily imply an RCU read-side critical section
(anymore).  Of course the spinlock specifically protecting updates would
suffice, but that's not what this is saying.

Am I way off base?

thanks,
-serge