lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Date:	Thu, 10 Jul 2014 14:05:11 +0200
From:	Rasmus Villemoes <>
To:	Bjorn Helgaas <>
	Rasmus Villemoes <>
Subject: [PATCH] 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 <>
 include/linux/pci_ids.h | 4 ++++
 1 file changed, 4 insertions(+)

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_VENDOR_ID_OCZ		0x1b85
+#endif /* _LINUX_PCI_IDS_H */

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

Powered by blists - more mailing lists