documentation: explain memory barriers

We want all uses of memory barriers to be explained in the source code.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Randy Dunlap 2008-10-15 22:01:59 -07:00 коммит произвёл Linus Torvalds
Родитель 7968b3d9a6
Коммит 8033fe65a6
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@ -85,3 +85,6 @@ kernel patches.
23: Tested after it has been merged into the -mm patchset to make sure
that it still works with all of the other queued patches and various
changes in the VM, VFS, and other subsystems.
24: All memory barriers {e.g., barrier(), rmb(), wmb()} need a comment in the
source code that explains the logic of what they are doing and why.