On Thu, Dec 13, 2012 at 11:07:32AM +0100, Richard Braun wrote: > > Signed-off-by: Richard Braun <rbraun@xxxxxxxxx> Queued for 3.9, thank you! Thanx, Paul > --- > Documentation/atomic_ops.txt | 2 ++ > Documentation/memory-barriers.txt | 1 + > 2 files changed, 3 insertions(+), 0 deletions(-) > > diff --git a/Documentation/atomic_ops.txt b/Documentation/atomic_ops.txt > index 27f2b21..d9ca5be 100644 > --- a/Documentation/atomic_ops.txt > +++ b/Documentation/atomic_ops.txt > @@ -253,6 +253,8 @@ This performs an atomic exchange operation on the atomic variable v, setting > the given new value. It returns the old value that the atomic variable v had > just before the operation. > > +atomic_xchg requires explicit memory barriers around the operation. > + > int atomic_cmpxchg(atomic_t *v, int old, int new); > > This performs an atomic compare exchange operation on the atomic value v, > diff --git a/Documentation/memory-barriers.txt b/Documentation/memory-barriers.txt > index 2759f7c..3ed5454 100644 > --- a/Documentation/memory-barriers.txt > +++ b/Documentation/memory-barriers.txt > @@ -1684,6 +1684,7 @@ explicit lock operations, described later). These include: > > xchg(); > cmpxchg(); > + atomic_xchg(); > atomic_cmpxchg(); > atomic_inc_return(); > atomic_dec_return(); > -- > 1.7.2.5 > -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
