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Rasmus Villemoes authored
Adding an include guard frees the preprocessor from reparsing over 2600 #defines in the cases where pci_ids.h is somehow included more than once. This gives a tiny-but-measurable performance improvement when compiling such files. Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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