[POWERPC] Only export __mtdcr/__mfdcr if CONFIG_PPC_DCR is set

On 85xx we don't build in dcr support because the core doesn't implement the
instructions.  This caused problems when building an 85xx kernel.  Additionally
made it so we only build __mtdcr/__mfdcr if we are CONFIG_PPC_DCR_NATIVE.

The 85xx build issue wasPointed out by Dai Haruki.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

5 files changed, 42 insertions, 38 deletions

diff --git a/arch/powerpc/kernel/ppc_ksyms.c b/arch/powerpc/kernel/ppc_ksyms.c
index 9179f0739ea..95776b6af4e 100644
--- a/arch/powerpc/kernel/ppc_ksyms.c
+++ b/arch/powerpc/kernel/ppc_ksyms.c
@@ -208,7 +208,7 @@ EXPORT_SYMBOL(mmu_hash_lock); /* For MOL */
 extern long *intercept_table;
 EXPORT_SYMBOL(intercept_table);
 #endif /* CONFIG_PPC_STD_MMU_32 */
-#if defined(CONFIG_40x) || defined(CONFIG_BOOKE)
+#ifdef CONFIG_PPC_DCR_NATIVE
 EXPORT_SYMBOL(__mtdcr);
 EXPORT_SYMBOL(__mfdcr);
 #endif
diff --git a/arch/powerpc/sysdev/Makefile b/arch/powerpc/sysdev/Makefile
index 6cc34597a62..04d4917eb30 100644
--- a/arch/powerpc/sysdev/Makefile
+++ b/arch/powerpc/sysdev/Makefile
@@ -5,7 +5,8 @@ endif
 obj-$(CONFIG_MPIC)		+= mpic.o
 obj-$(CONFIG_PPC_INDIRECT_PCI)	+= indirect_pci.o
 obj-$(CONFIG_PPC_MPC106)	+= grackle.o
-obj-$(CONFIG_PPC_DCR)		+= dcr.o dcr-low.o
+obj-$(CONFIG_PPC_DCR)		+= dcr.o
+obj-$(CONFIG_PPC_DCR_NATIVE)	+= dcr-low.o
 obj-$(CONFIG_U3_DART)		+= dart_iommu.o
 obj-$(CONFIG_MMIO_NVRAM)	+= mmio_nvram.o
 obj-$(CONFIG_FSL_SOC)		+= fsl_soc.o
diff --git a/include/asm-powerpc/dcr-native.h b/include/asm-powerpc/dcr-native.h
index fd4a5f5e33d..d7a1bc1551c 100644
--- a/include/asm-powerpc/dcr-native.h
+++ b/include/asm-powerpc/dcr-native.h
@@ -20,8 +20,7 @@
 #ifndef _ASM_POWERPC_DCR_NATIVE_H
 #define _ASM_POWERPC_DCR_NATIVE_H
 #ifdef __KERNEL__
-
-#include <asm/reg.h>
+#ifndef __ASSEMBLY__
 
 typedef struct {} dcr_host_t;
 
@@ -32,7 +31,41 @@ typedef struct {} dcr_host_t;
 #define dcr_read(host, dcr_n)		mfdcr(dcr_n)
 #define dcr_write(host, dcr_n, value)	mtdcr(dcr_n, value)
 
+/* Device Control Registers */
+void __mtdcr(int reg, unsigned int val);
+unsigned int __mfdcr(int reg);
+#define mfdcr(rn)						\
+	({unsigned int rval;					\
+	if (__builtin_constant_p(rn))				\
+		asm volatile("mfdcr %0," __stringify(rn)	\
+		              : "=r" (rval));			\
+	else							\
+		rval = __mfdcr(rn);				\
+	rval;})
+
+#define mtdcr(rn, v)						\
+do {								\
+	if (__builtin_constant_p(rn))				\
+		asm volatile("mtdcr " __stringify(rn) ",%0"	\
+			      : : "r" (v)); 			\
+	else							\
+		__mtdcr(rn, v);					\
+} while (0)
+
+/* R/W of indirect DCRs make use of standard naming conventions for DCRs */
+#define mfdcri(base, reg)			\
+({						\
+	mtdcr(base ## _CFGADDR, base ## _ ## reg);	\
+	mfdcr(base ## _CFGDATA);			\
+})
+
+#define mtdcri(base, reg, data)			\
+do {						\
+	mtdcr(base ## _CFGADDR, base ## _ ## reg);	\
+	mtdcr(base ## _CFGDATA, data);		\
+} while (0)
 
+#endif /* __ASSEMBLY__ */
 #endif /* __KERNEL__ */
 #endif /* _ASM_POWERPC_DCR_NATIVE_H */
 
diff --git a/include/asm-powerpc/dcr.h b/include/asm-powerpc/dcr.h
index 473f2c7fd89..b66c5e6941f 100644
--- a/include/asm-powerpc/dcr.h
+++ b/include/asm-powerpc/dcr.h
@@ -20,6 +20,7 @@
 #ifndef _ASM_POWERPC_DCR_H
 #define _ASM_POWERPC_DCR_H
 #ifdef __KERNEL__
+#ifdef CONFIG_PPC_DCR
 
 #ifdef CONFIG_PPC_DCR_NATIVE
 #include <asm/dcr-native.h>
@@ -38,5 +39,6 @@ extern unsigned int dcr_resource_len(struct device_node *np,
 				     unsigned int index);
 #endif /* CONFIG_PPC_MERGE */
 
+#endif /* CONFIG_PPC_DCR */
 #endif /* __KERNEL__ */
 #endif /* _ASM_POWERPC_DCR_H */
diff --git a/include/asm-ppc/reg_booke.h b/include/asm-ppc/reg_booke.h
index 602fbadeaf4..a263fc1e65c 100644
--- a/include/asm-ppc/reg_booke.h
+++ b/include/asm-ppc/reg_booke.h
@@ -9,41 +9,9 @@
 #ifndef __ASM_PPC_REG_BOOKE_H__
 #define __ASM_PPC_REG_BOOKE_H__
 
-#ifndef __ASSEMBLY__
-/* Device Control Registers */
-void __mtdcr(int reg, unsigned int val);
-unsigned int __mfdcr(int reg);
-#define mfdcr(rn)						\
-	({unsigned int rval;					\
-	if (__builtin_constant_p(rn))				\
-		asm volatile("mfdcr %0," __stringify(rn)	\
-		              : "=r" (rval));			\
-	else							\
-		rval = __mfdcr(rn);				\
-	rval;})
-
-#define mtdcr(rn, v)						\
-do {								\
-	if (__builtin_constant_p(rn))				\
-		asm volatile("mtdcr " __stringify(rn) ",%0"	\
-			      : : "r" (v)); 			\
-	else							\
-		__mtdcr(rn, v);					\
-} while (0)
-
-/* R/W of indirect DCRs make use of standard naming conventions for DCRs */
-#define mfdcri(base, reg)			\
-({						\
-	mtdcr(base ## _CFGADDR, base ## _ ## reg);	\
-	mfdcr(base ## _CFGDATA);			\
-})
-
-#define mtdcri(base, reg, data)			\
-do {						\
-	mtdcr(base ## _CFGADDR, base ## _ ## reg);	\
-	mtdcr(base ## _CFGDATA, data);		\
-} while (0)
+#include <asm/dcr.h>
 
+#ifndef __ASSEMBLY__
 /* Performance Monitor Registers */
 #define mfpmr(rn)	({unsigned int rval; \
 			asm volatile("mfpmr %0," __stringify(rn) \