PCI: Add include guard to include/linux/pci_ids.h
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>
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index 7fa3173..6ed0bb7 100644
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -6,6 +6,8 @@
* Do not add new entries to this file unless the definitions
* are shared between multiple drivers.
*/
+#ifndef _LINUX_PCI_IDS_H
+#define _LINUX_PCI_IDS_H
/* Device classes and subclasses */
@@ -2968,3 +2970,5 @@
#define PCI_DEVICE_ID_XEN_PLATFORM 0x0001
#define PCI_VENDOR_ID_OCZ 0x1b85
+
+#endif /* _LINUX_PCI_IDS_H */