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Message-ID: <20140710220233.GA21053@google.com> Date: Thu, 10 Jul 2014 16:02:33 -0600 From: Bjorn Helgaas <bhelgaas@...gle.com> To: Rasmus Villemoes <linux@...musvillemoes.dk> Cc: linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH] pci: Add include guard to include/linux/pci_ids.h On Thu, Jul 10, 2014 at 02:05:11PM +0200, Rasmus Villemoes wrote: > 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@...musvillemoes.dk> Applied to pci/misc for v3.17, thanks! > --- > 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_DEVICE_ID_XEN_PLATFORM 0x0001 > > #define PCI_VENDOR_ID_OCZ 0x1b85 > + > +#endif /* _LINUX_PCI_IDS_H */ > -- > 1.9.2 > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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