tree 247b6d9fb61598e196d230dc85462030ad857355
parent 672c5761e6763a76b414a8deaebb787696100ea1
author Alan Stern <stern@rowland.harvard.edu> 1555694505 -0400
committer Paul E. McKenney <paulmck@linux.ibm.com> 1555697729 -0700

Documentation: atomic_t.txt: Explain ordering provided by smp_mb__{before,after}_atomic()

The description of smp_mb__before_atomic() and smp_mb__after_atomic()
in Documentation/atomic_t.txt is slightly terse and misleading.  It
does not clearly state that these barriers only affect the ordering of
other instructions with respect to the atomic operation.

This improves the text to make the actual ordering implications clear,
and also to explain how these barriers differ from a RELEASE or
ACQUIRE ordering.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>