powerpc: Factor do_feature_fixup calls

32 and 64-bit do a similar set of calls early on, we move it all to
a single common function to make the boot code more readable.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/include/asm/feature-fixups.h

@@ -184,4 +184,8 @@ label##3:					       	\
 	FTR_ENTRY_OFFSET label##1b-label##3b;		\
 	.popsection;
 
+#ifndef __ASSEMBLY__
+void apply_feature_fixups(void);
+#endif
+
 #endif /* __ASM_POWERPC_FEATURE_FIXUPS_H */

arch/powerpc/include/asm/synch.h

@@ -13,7 +13,6 @@
 extern unsigned int __start___lwsync_fixup, __stop___lwsync_fixup;
 extern void do_lwsync_fixups(unsigned long value, void *fixup_start,
 			     void *fixup_end);
-extern void do_final_fixups(void);
 
 static inline void eieio(void)
 {

arch/powerpc/kernel/setup_32.c

@@ -70,7 +70,6 @@ int ucache_bsize;
 notrace unsigned long __init early_init(unsigned long dt_ptr)
 {
 	unsigned long offset = reloc_offset();
-	struct cpu_spec *spec;
 
 	/* First zero the BSS -- use memset_io, some platforms don't have
 	 * caches on yet */
@@ -81,21 +80,9 @@ notrace unsigned long __init early_init(unsigned long dt_ptr)
 	 * Identify the CPU type and fix up code sections
 	 * that depend on which cpu we have.
 	 */
-	spec = identify_cpu(offset, mfspr(SPRN_PVR));
+	identify_cpu(offset, mfspr(SPRN_PVR));
 
-	do_feature_fixups(spec->cpu_features,
+	apply_feature_fixups();
-			  PTRRELOC(&__start___ftr_fixup),
-			  PTRRELOC(&__stop___ftr_fixup));
-
-	do_feature_fixups(spec->mmu_features,
-			  PTRRELOC(&__start___mmu_ftr_fixup),
-			  PTRRELOC(&__stop___mmu_ftr_fixup));
-
-	do_lwsync_fixups(spec->cpu_features,
-			 PTRRELOC(&__start___lwsync_fixup),
-			 PTRRELOC(&__stop___lwsync_fixup));
-
-	do_final_fixups();
 
 	return KERNELBASE + offset;
 }

arch/powerpc/kernel/setup_64.c

@@ -467,18 +467,7 @@ void __init setup_system(void)
 {
 	DBG(" -> setup_system()\n");
 
-	/* Apply the CPUs-specific and firmware specific fixups to kernel
+	apply_feature_fixups();
-	 * text (nop out sections not relevant to this CPU or this firmware)
-	 */
-	do_feature_fixups(cur_cpu_spec->cpu_features,
-			  &__start___ftr_fixup, &__stop___ftr_fixup);
-	do_feature_fixups(cur_cpu_spec->mmu_features,
-			  &__start___mmu_ftr_fixup, &__stop___mmu_ftr_fixup);
-	do_feature_fixups(powerpc_firmware_features,
-			  &__start___fw_ftr_fixup, &__stop___fw_ftr_fixup);
-	do_lwsync_fixups(cur_cpu_spec->cpu_features,
-			 &__start___lwsync_fixup, &__stop___lwsync_fixup);
-	do_final_fixups();
 
 	/*
 	 * Unflatten the device-tree passed by prom_init or kexec

arch/powerpc/lib/feature-fixups.c

@@ -20,7 +20,8 @@
 #include <asm/code-patching.h>
 #include <asm/page.h>
 #include <asm/sections.h>
-
+#include <asm/setup.h>
+#include <asm/firmware.h>
 
 struct fixup_entry {
 	unsigned long	mask;
@@ -130,7 +131,7 @@ void do_lwsync_fixups(unsigned long value, void *fixup_start, void *fixup_end)
 	}
 }
 
-void do_final_fixups(void)
+static void do_final_fixups(void)
 {
 #if defined(CONFIG_PPC64) && defined(CONFIG_RELOCATABLE)
 	int *src, *dest;
@@ -151,6 +152,33 @@ void do_final_fixups(void)
 #endif
 }
 
+void apply_feature_fixups(void)
+{
+	struct cpu_spec *spec = *PTRRELOC(&cur_cpu_spec);
+
+	/*
+	 * Apply the CPU-specific and firmware specific fixups to kernel text
+	 * (nop out sections not relevant to this CPU or this firmware).
+	 */
+	do_feature_fixups(spec->cpu_features,
+			  PTRRELOC(&__start___ftr_fixup),
+			  PTRRELOC(&__stop___ftr_fixup));
+
+	do_feature_fixups(spec->mmu_features,
+			  PTRRELOC(&__start___mmu_ftr_fixup),
+			  PTRRELOC(&__stop___mmu_ftr_fixup));
+
+	do_lwsync_fixups(spec->cpu_features,
+			 PTRRELOC(&__start___lwsync_fixup),
+			 PTRRELOC(&__stop___lwsync_fixup));
+
+#ifdef CONFIG_PPC64
+	do_feature_fixups(powerpc_firmware_features,
+			  &__start___fw_ftr_fixup, &__stop___fw_ftr_fixup);
+#endif
+	do_final_fixups();
+}
+
 #ifdef CONFIG_FTR_FIXUP_SELFTEST
 
 #define check(x)	\