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ce9119ad90
In the PTREGSCALL1 and 2 macros, we can trivially avoid an unnecessary pipeline serialization, so do so. In PTREGSCALLS3 this is much less clear-cut since we have to push a new value to the stack. Leave it alone for now assuming it is as good as it is going to be; may want to check on Atom or another in-order x86 to see if we can do better. Signed-off-by: H. Peter Anvin <hpa@zytor.com> Cc: Brian Gerst <brgerst@gmail.com> LKML-Reference: <1260403316-5679-2-git-send-email-brgerst@gmail.com>