[patch RFC 17/38] x86/pci: Reducde #ifdeffery in PCI init code

[Thomas Gleixner <tglx@xxxxxxxxxxxxx>]

Adding a function call before the first #ifdef in arch_pci_init() triggers
a 'mixed declarations and code' warning if PCI_DIRECT is enabled.

Use stub functions and move the #ifdeffery to the header file where it is
not in the way.

Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: linux-pci@xxxxxxxxxxxxxxx
---
 arch/x86/include/asm/pci_x86.h |   11 +++++++++++
 arch/x86/pci/init.c            |   10 +++-------
 2 files changed, 14 insertions(+), 7 deletions(-)

--- a/arch/x86/include/asm/pci_x86.h
+++ b/arch/x86/include/asm/pci_x86.h
@@ -114,9 +114,20 @@ extern const struct pci_raw_ops pci_dire
 extern bool port_cf9_safe;
 
 /* arch_initcall level */
+#ifdef CONFIG_PCI_DIRECT
 extern int pci_direct_probe(void);
 extern void pci_direct_init(int type);
+#else
+static inline int pci_direct_probe(void) { return -1; }
+static inline  void pci_direct_init(int type) { }
+#endif
+
+#ifdef CONFIG_PCI_BIOS
 extern void pci_pcbios_init(void);
+#else
+static inline void pci_pcbios_init(void) { }
+#endif
+
 extern void __init dmi_check_pciprobe(void);
 extern void __init dmi_check_skip_isa_align(void);
 
--- a/arch/x86/pci/init.c
+++ b/arch/x86/pci/init.c
@@ -8,11 +8,9 @@
    in the right sequence from here. */
 static __init int pci_arch_init(void)
 {
-#ifdef CONFIG_PCI_DIRECT
-       int type = 0;
+       int type;
 
        type = pci_direct_probe();
-#endif
 
        if (!(pci_probe & PCI_PROBE_NOEARLY))
                pci_mmcfg_early_init();
@@ -20,18 +18,16 @@ static __init int pci_arch_init(void)
        if (x86_init.pci.arch_init && !x86_init.pci.arch_init())
                return 0;
 
-#ifdef CONFIG_PCI_BIOS
        pci_pcbios_init();
-#endif
+
        /*
         * don't check for raw_pci_ops here because we want pcbios as last
         * fallback, yet it's needed to run first to set pcibios_last_bus
         * in case legacy PCI probing is used. otherwise detecting peer busses
         * fails.
         */
-#ifdef CONFIG_PCI_DIRECT
        pci_direct_init(type);
-#endif
+
        if (!raw_pci_ops && !raw_pci_ext_ops)
                printk(KERN_ERR
                "PCI: Fatal: No config space access function found\n");