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>
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@ -85,3 +85,6 @@ kernel patches.
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23: Tested after it has been merged into the -mm patchset to make sure
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that it still works with all of the other queued patches and various
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changes in the VM, VFS, and other subsystems.
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24: All memory barriers {e.g., barrier(), rmb(), wmb()} need a comment in the
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source code that explains the logic of what they are doing and why.
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