Commit-ID: 65f95ff2e41a32dd190cf28e3abb029625eef968
Gitweb: http://git.kernel.org/tip/65f95ff2e41a32dd190cf28e3abb029625eef968
Author: SeongJae Park <sj38.park@xxxxxxxxx>
AuthorDate: Mon, 22 Feb 2016 08:28:29 -0800
Committer: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
CommitDate: Mon, 14 Mar 2016 15:52:19 -0700
documentation: Clarify compiler store-fusion example
The compiler store-fusion example in memory-barriers.txt uses a C
comment to represent arbitrary code that does not update a given
variable. Unfortunately, someone could reasonably interpret the
comment as instead referring to the following line of code. This
commit therefore replaces the comment with a string that more
clearly represents the arbitrary code.
Signed-off-by: SeongJae Park <sj38.park@xxxxxxxxx>
Acked-by: David Howells <dhowells@xxxxxxxxxx>
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
---
Documentation/memory-barriers.txt | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/Documentation/memory-barriers.txt b/Documentation/memory-barriers.txt
index 8367d39..3729cbe 100644
--- a/Documentation/memory-barriers.txt
+++ b/Documentation/memory-barriers.txt
@@ -1550,7 +1550,7 @@ of optimizations:
the following:
a = 0;
- /* Code that does not store to variable a. */
+ ... Code that does not store to variable a ...
a = 0;
The compiler sees that the value of variable 'a' is already zero, so
@@ -1562,7 +1562,7 @@ of optimizations:
wrong guess:
WRITE_ONCE(a, 0);
- /* Code that does not store to variable a. */
+ ... Code that does not store to variable a ...
WRITE_ONCE(a, 0);
(*) The compiler is within its rights to reorder memory accesses unless
--
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