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authorRasmus Villemoes <linux@rasmusvillemoes.dk>2014-07-10 14:05:11 +0200
committerBjorn Helgaas <bhelgaas@google.com>2014-07-10 16:49:15 -0600
commit8e2614bbf619e210674c3eae7f087db7c55ff89b (patch)
treeb077643ce3e160719532e67871295a07020a61ae /include/linux/pci_ids.h
parent20cde694027e7477cc532833e38ab9fcaa83fb64 (diff)
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>
Diffstat (limited to 'include/linux/pci_ids.h')
-rw-r--r--include/linux/pci_ids.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index 7fa31731c85..6ed0bb73a86 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 */