[PATCH] Document Linux's memory barriers [try #4]

Eric W. Biederman ebiederm at xmission.com
Mon Mar 13 04:15:20 EST 2006

A small nit.  You are not documenting the most subtle memory barrier:
smp_read_barrier_depends();  Which is a deep requirement of the RCU

As I understand it.  On some architectures (alpha) without at least
this a load from a pointer can load from the an old pointer value.

At one point it was suggested this be called: 

Simply calling: rcu_dereference is what all users should call but
the semantics should be documented at least so that people porting
Linux can have a chance of getting it right.


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