powerpc: Introduce ppc_pci_flags accessors

Currently there are a number of platforms that open code access to
the ppc_pci_flags global variable.  However, that variable is not
present if CONFIG_PCI is not set, which can lead to a build break.

This introduces a number of accessor functions that are defined
to be empty in the case of CONFIG_PCI being disabled.  The
various platform files in the kernel are updated to use these.

Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

14 files changed, 42 insertions, 18 deletions

diff --git a/arch/powerpc/include/asm/pci-bridge.h b/arch/powerpc/include/asm/pci-bridge.h
index fa8b3b72443..84007afabdb 100644
--- a/arch/powerpc/include/asm/pci-bridge.h
+++ b/arch/powerpc/include/asm/pci-bridge.h
@@ -13,7 +13,6 @@
 
 struct device_node;
 
-extern unsigned int ppc_pci_flags;
 enum {
         /* Force re-assigning all resources (ignore firmware
          * setup completely)
@@ -36,6 +35,31 @@ enum {
         /* ... except for domain 0 */
         PPC_PCI_COMPAT_DOMAIN_0         = 0x00000020,
 };
+#ifdef CONFIG_PCI
+extern unsigned int ppc_pci_flags;
+
+static inline void ppc_pci_set_flags(int flags)
+{
+        ppc_pci_flags = flags;
+}
+
+static inline void ppc_pci_add_flags(int flags)
+{
+        ppc_pci_flags |= flags;
+}
+
+static inline int ppc_pci_has_flag(int flag)
+{
+        return (ppc_pci_flags & flag);
+}
+#else
+static inline void ppc_pci_set_flags(int flags) { }
+static inline void ppc_pci_add_flags(int flags) { }
+static inline int ppc_pci_has_flag(int flag)
+{
+        return 0;
+}
+#endif
 
 
 /*
diff --git a/arch/powerpc/include/asm/pci.h b/arch/powerpc/include/asm/pci.h
index 1c721a632d8..3548159a1be 100644
--- a/arch/powerpc/include/asm/pci.h
+++ b/arch/powerpc/include/asm/pci.h
@@ -38,8 +38,8 @@ struct pci_dev;
  * Set this to 1 if you want the kernel to re-assign all PCI
  * bus numbers (don't do that on ppc64 yet !)
  */
-#define pcibios_assign_all_busses()     (ppc_pci_flags & \
-                                         PPC_PCI_REASSIGN_ALL_BUS)
+#define pcibios_assign_all_busses() \
+        (ppc_pci_has_flag(PPC_PCI_REASSIGN_ALL_BUS))
 #define pcibios_scan_all_fns(a, b)      0
 
 static inline void pcibios_set_master(struct pci_dev *dev)
diff --git a/arch/powerpc/platforms/40x/ep405.c b/arch/powerpc/platforms/40x/ep405.c
index ae2e7f67c18..4058fd1e7fc 100644
--- a/arch/powerpc/platforms/40x/ep405.c
+++ b/arch/powerpc/platforms/40x/ep405.c
@@ -100,7 +100,7 @@ static void __init ep405_setup_arch(void)
         /* Find & init the BCSR CPLD */
         ep405_init_bcsr();
 
-        ppc_pci_flags = PPC_PCI_REASSIGN_ALL_RSRC;
+        ppc_pci_set_flags(PPC_PCI_REASSIGN_ALL_RSRC);
 }
 
 static int __init ep405_probe(void)
diff --git a/arch/powerpc/platforms/40x/kilauea.c b/arch/powerpc/platforms/40x/kilauea.c
index 1dd24ffc0dc..fd7d934dac8 100644
--- a/arch/powerpc/platforms/40x/kilauea.c
+++ b/arch/powerpc/platforms/40x/kilauea.c
@@ -44,7 +44,7 @@ static int __init kilauea_probe(void)
         if (!of_flat_dt_is_compatible(root, "amcc,kilauea"))
                 return 0;
 
-        ppc_pci_flags = PPC_PCI_REASSIGN_ALL_RSRC;
+        ppc_pci_set_flags(PPC_PCI_REASSIGN_ALL_RSRC);
 
         return 1;
 }
diff --git a/arch/powerpc/platforms/40x/ppc40x_simple.c b/arch/powerpc/platforms/40x/ppc40x_simple.c
index 4498a86b46c..f40ac9b8f99 100644
--- a/arch/powerpc/platforms/40x/ppc40x_simple.c
+++ b/arch/powerpc/platforms/40x/ppc40x_simple.c
@@ -61,7 +61,7 @@ static int __init ppc40x_probe(void)
 
         for (i = 0; i < ARRAY_SIZE(board); i++) {
                 if (of_flat_dt_is_compatible(root, board[i])) {
-                        ppc_pci_flags = PPC_PCI_REASSIGN_ALL_RSRC;
+                        ppc_pci_set_flags(PPC_PCI_REASSIGN_ALL_RSRC);
                         return 1;
                 }
         }
diff --git a/arch/powerpc/platforms/44x/ebony.c b/arch/powerpc/platforms/44x/ebony.c
index a0e8fe4662f..88b9117fa69 100644
--- a/arch/powerpc/platforms/44x/ebony.c
+++ b/arch/powerpc/platforms/44x/ebony.c
@@ -54,7 +54,7 @@ static int __init ebony_probe(void)
         if (!of_flat_dt_is_compatible(root, "ibm,ebony"))
                 return 0;
 
-        ppc_pci_flags = PPC_PCI_REASSIGN_ALL_RSRC;
+        ppc_pci_set_flags(PPC_PCI_REASSIGN_ALL_RSRC);
 
         return 1;
 }
diff --git a/arch/powerpc/platforms/44x/ppc44x_simple.c b/arch/powerpc/platforms/44x/ppc44x_simple.c
index 29671262801..76fdc51dac8 100644
--- a/arch/powerpc/platforms/44x/ppc44x_simple.c
+++ b/arch/powerpc/platforms/44x/ppc44x_simple.c
@@ -69,7 +69,7 @@ static int __init ppc44x_probe(void)
 
         for (i = 0; i < ARRAY_SIZE(board); i++) {
                 if (of_flat_dt_is_compatible(root, board[i])) {
-                        ppc_pci_flags = PPC_PCI_REASSIGN_ALL_RSRC;
+                        ppc_pci_set_flags(PPC_PCI_REASSIGN_ALL_RSRC);
                         return 1;
                 }
         }
diff --git a/arch/powerpc/platforms/44x/sam440ep.c b/arch/powerpc/platforms/44x/sam440ep.c
index 47f10e64773..a78e8eb6da4 100644
--- a/arch/powerpc/platforms/44x/sam440ep.c
+++ b/arch/powerpc/platforms/44x/sam440ep.c
@@ -51,7 +51,7 @@ static int __init sam440ep_probe(void)
         if (!of_flat_dt_is_compatible(root, "acube,sam440ep"))
                 return 0;
 
-        ppc_pci_flags = PPC_PCI_REASSIGN_ALL_RSRC;
+        ppc_pci_set_flags(PPC_PCI_REASSIGN_ALL_RSRC);
 
         return 1;
 }
diff --git a/arch/powerpc/platforms/52xx/mpc52xx_pci.c b/arch/powerpc/platforms/52xx/mpc52xx_pci.c
index b49a1852766..c3f2c21024e 100644
--- a/arch/powerpc/platforms/52xx/mpc52xx_pci.c
+++ b/arch/powerpc/platforms/52xx/mpc52xx_pci.c
@@ -375,7 +375,7 @@ mpc52xx_add_bridge(struct device_node *node)
 
         pr_debug("Adding MPC52xx PCI host bridge %s\n", node->full_name);
 
-        ppc_pci_flags |= PPC_PCI_REASSIGN_ALL_BUS;
+        ppc_pci_add_flags(PPC_PCI_REASSIGN_ALL_BUS);
 
         if (of_address_to_resource(node, 0, &rsrc) != 0) {
                 printk(KERN_ERR "Can't get %s resources\n", node->full_name);
diff --git a/arch/powerpc/platforms/82xx/pq2.c b/arch/powerpc/platforms/82xx/pq2.c
index 1b75902fad6..9761a59f175 100644
--- a/arch/powerpc/platforms/82xx/pq2.c
+++ b/arch/powerpc/platforms/82xx/pq2.c
@@ -53,7 +53,7 @@ static void __init pq2_pci_add_bridge(struct device_node *np)
         if (of_address_to_resource(np, 0, &r) || r.end - r.start < 0x10b)
                 goto err;
 
-        ppc_pci_flags |= PPC_PCI_REASSIGN_ALL_BUS;
+        ppc_pci_add_flags(PPC_PCI_REASSIGN_ALL_BUS);
 
         hose = pcibios_alloc_controller(np);
         if (!hose)
diff --git a/arch/powerpc/platforms/chrp/pci.c b/arch/powerpc/platforms/chrp/pci.c
index 5a72ee5767e..f6b0c519d5a 100644
--- a/arch/powerpc/platforms/chrp/pci.c
+++ b/arch/powerpc/platforms/chrp/pci.c
@@ -199,7 +199,7 @@ static void __init setup_peg2(struct pci_controller *hose, struct device_node *d
                 printk ("RTAS supporting Pegasos OF not found, please upgrade"
                         " your firmware\n");
         }
-        ppc_pci_flags |= PPC_PCI_REASSIGN_ALL_BUS;
+        ppc_pci_add_flags(PPC_PCI_REASSIGN_ALL_BUS);
         /* keep the reference to the root node */
 }
 
diff --git a/arch/powerpc/platforms/powermac/pci.c b/arch/powerpc/platforms/powermac/pci.c
index bcf50d7056e..54b7b76ed4f 100644
--- a/arch/powerpc/platforms/powermac/pci.c
+++ b/arch/powerpc/platforms/powermac/pci.c
@@ -729,7 +729,7 @@ static void __init setup_bandit(struct pci_controller *hose,
 static int __init setup_uninorth(struct pci_controller *hose,
                                  struct resource *addr)
 {
-        ppc_pci_flags |= PPC_PCI_REASSIGN_ALL_BUS;
+        ppc_pci_add_flags(PPC_PCI_REASSIGN_ALL_BUS);
         has_uninorth = 1;
         hose->ops = &macrisc_pci_ops;
         hose->cfg_addr = ioremap(addr->start + 0x800000, 0x1000);
@@ -996,7 +996,7 @@ void __init pmac_pci_init(void)
         struct device_node *np, *root;
         struct device_node *ht = NULL;
 
-        ppc_pci_flags = PPC_PCI_CAN_SKIP_ISA_ALIGN;
+        ppc_pci_set_flags(PPC_PCI_CAN_SKIP_ISA_ALIGN);
 
         root = of_find_node_by_path("/");
         if (root == NULL) {
@@ -1055,7 +1055,7 @@ void __init pmac_pci_init(void)
          * some offset between bus number and domains for now when we
          * assign all busses should help for now
          */
-        if (ppc_pci_flags & PPC_PCI_REASSIGN_ALL_BUS)
+        if (ppc_pci_has_flag(PPC_PCI_REASSIGN_ALL_BUS))
                 pcibios_assign_bus_offset = 0x10;
 #endif
 }
diff --git a/arch/powerpc/sysdev/fsl_pci.c b/arch/powerpc/sysdev/fsl_pci.c
index 5b264eb4b1f..d5f9ae0f1b7 100644
--- a/arch/powerpc/sysdev/fsl_pci.c
+++ b/arch/powerpc/sysdev/fsl_pci.c
@@ -187,7 +187,7 @@ int __init fsl_add_bridge(struct device_node *dev, int is_primary)
                 printk(KERN_WARNING "Can't get bus-range for %s, assume"
                         " bus 0\n", dev->full_name);
 
-        ppc_pci_flags |= PPC_PCI_REASSIGN_ALL_BUS;
+        ppc_pci_add_flags(PPC_PCI_REASSIGN_ALL_BUS);
         hose = pcibios_alloc_controller(dev);
         if (!hose)
                 return -ENOMEM;
@@ -300,7 +300,7 @@ int __init mpc83xx_add_bridge(struct device_node *dev)
                        " bus 0\n", dev->full_name);
         }
 
-        ppc_pci_flags |= PPC_PCI_REASSIGN_ALL_BUS;
+        ppc_pci_add_flags(PPC_PCI_REASSIGN_ALL_BUS);
         hose = pcibios_alloc_controller(dev);
         if (!hose)
                 return -ENOMEM;
diff --git a/arch/powerpc/sysdev/grackle.c b/arch/powerpc/sysdev/grackle.c
index d502927644c..5da37c2f22e 100644
--- a/arch/powerpc/sysdev/grackle.c
+++ b/arch/powerpc/sysdev/grackle.c
@@ -57,7 +57,7 @@ void __init setup_grackle(struct pci_controller *hose)
 {
         setup_indirect_pci(hose, 0xfec00000, 0xfee00000, 0);
         if (machine_is_compatible("PowerMac1,1"))
-                ppc_pci_flags |= PPC_PCI_REASSIGN_ALL_BUS;
+                ppc_pci_add_flags(PPC_PCI_REASSIGN_ALL_BUS);
         if (machine_is_compatible("AAPL,PowerBook1998"))
                 grackle_set_loop_snoop(hose, 1);
 #if 0   /* Disabled for now, HW problems ??? */