PCI: Clean up build for CONFIG_PCI_QUIRKS unset

Currently, drivers/pci/quirks.c is built unconditionally, but if
CONFIG_PCI_QUIRKS is unset, the only things actually built in this
file are definitions of global variables and empty functions (due to
the #ifdef CONFIG_PCI_QUIRKS embracing all of the code inside the
file).  This is not particularly nice and if someone overlooks
the #ifdef CONFIG_PCI_QUIRKS, build errors are introduced.

To clean that up, move the definitions of the global variables in
quirks.c that are always built to pci.c, move the definitions of
the empty functions (compiled when CONFIG_PCI_QUIRKS is unset) to
headers (additionally make these functions static inline) and modify
drivers/pci/Makefile so that quirks.c is only built if
CONFIG_PCI_QUIRKS is set.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

4 files changed, 18 insertions, 14 deletions

diff --git a/drivers/pci/Makefile b/drivers/pci/Makefile
index 4df48d5..adb7425 100644
--- a/drivers/pci/Makefile
+++ b/drivers/pci/Makefile
@@ -2,12 +2,14 @@
 # Makefile for the PCI bus specific drivers.
 #
 
-obj-y		+= access.o bus.o probe.o remove.o pci.o quirks.o \
+obj-y		+= access.o bus.o probe.o remove.o pci.o \
 			pci-driver.o search.o pci-sysfs.o rom.o setup-res.o \
 			irq.o
 obj-$(CONFIG_PROC_FS) += proc.o
 obj-$(CONFIG_SYSFS) += slot.o
 
+obj-$(CONFIG_PCI_QUIRKS) += quirks.o
+
 obj-$(CONFIG_PCI_LEGACY) += legacy.o
 CFLAGS_legacy.o += -Wno-deprecated-declarations
 
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 315fea4..1f9be53 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -19,7 +19,6 @@
 #include <linux/pci-aspm.h>
 #include <linux/pm_wakeup.h>
 #include <linux/interrupt.h>
-#include <asm/dma.h>	/* isa_dma_bridge_buggy */
 #include <linux/device.h>
 #include <asm/setup.h>
 #include "pci.h"
@@ -29,6 +28,12 @@ const char *pci_power_names[] = {
 };
 EXPORT_SYMBOL_GPL(pci_power_names);
 
+int isa_dma_bridge_buggy;
+EXPORT_SYMBOL(isa_dma_bridge_buggy);
+
+int pci_pci_problems;
+EXPORT_SYMBOL(pci_pci_problems);
+
 unsigned int pci_pm_d3_delay;
 
 static void pci_dev_d3_sleep(struct pci_dev *dev)
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index fbd0e3a..5d169bc 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -319,6 +319,13 @@ struct pci_dev_reset_methods {
 	int (*reset)(struct pci_dev *dev, int probe);
 };
 
+#ifdef CONFIG_PCI_QUIRKS
 extern int pci_dev_specific_reset(struct pci_dev *dev, int probe);
+#else
+static inline int pci_dev_specific_reset(struct pci_dev *dev, int probe)
+{
+	return -ENOTTY;
+}
+#endif
 
 #endif /* DRIVERS_PCI_H */
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index d58b940..790eb69 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -25,14 +25,9 @@
 #include <linux/dmi.h>
 #include <linux/pci-aspm.h>
 #include <linux/ioport.h>
+#include <asm/dma.h>	/* isa_dma_bridge_buggy */
 #include "pci.h"
 
-int isa_dma_bridge_buggy;
-EXPORT_SYMBOL(isa_dma_bridge_buggy);
-int pci_pci_problems;
-EXPORT_SYMBOL(pci_pci_problems);
-
-#ifdef CONFIG_PCI_QUIRKS
 /*
  * This quirk function disables memory decoding and releases memory resources
  * of the device specified by kernel's boot parameter 'pci=resource_alignment='.
@@ -2612,6 +2607,7 @@ void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev)
 	}
 	pci_do_fixups(dev, start, end);
 }
+EXPORT_SYMBOL(pci_fixup_device);
 
 static int __init pci_apply_final_quirks(void)
 {
@@ -2723,9 +2719,3 @@ int pci_dev_specific_reset(struct pci_dev *dev, int probe)
 
 	return -ENOTTY;
 }
-
-#else
-void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev) {}
-int pci_dev_specific_reset(struct pci_dev *dev, int probe) { return -ENOTTY; }
-#endif
-EXPORT_SYMBOL(pci_fixup_device);