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Subject[PATCH memory-barriers.txt 7/7] Documentation,barriers: Mention smp_cond_acquire()
Date
From: Davidlohr Bueso <dave@stgolabs.net>

... do this next to smp_load_acquire when first mentioning
ACQUIRE. While this call is briefly explained and ctrl
dependencies are mentioned later, it does not hurt the reader.

Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
---
Documentation/memory-barriers.txt | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/Documentation/memory-barriers.txt b/Documentation/memory-barriers.txt
index 7133626a61d0..a9454b1c73bd 100644
--- a/Documentation/memory-barriers.txt
+++ b/Documentation/memory-barriers.txt
@@ -431,8 +431,9 @@ And a couple of implicit varieties:
This acts as a one-way permeable barrier. It guarantees that all memory
operations after the ACQUIRE operation will appear to happen after the
ACQUIRE operation with respect to the other components of the system.
- ACQUIRE operations include LOCK operations and smp_load_acquire()
- operations.
+ ACQUIRE operations include LOCK operations and both smp_load_acquire()
+ and smp_cond_acquire() operations. The later builds the necessary ACQUIRE
+ semantics from relying on a control dependency and smp_rmb().

Memory operations that occur before an ACQUIRE operation may appear to
happen after it completes.
--
2.5.2
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