1 files changed, 19 insertions, 1 deletions

diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index e514c76043b4..10fce616e995 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -29,6 +29,8 @@
 #include <linux/fs.h>
 #include <linux/proc_fs.h>
 #include <linux/memblock.h>
+#include <linux/bug.h>
+#include <linux/compiler.h>
 
 #include <asm/unified.h>
 #include <asm/cpu.h>
@@ -42,6 +44,7 @@
 #include <asm/cacheflush.h>
 #include <asm/cachetype.h>
 #include <asm/tlbflush.h>
+#include <asm/system.h>
 
 #include <asm/prom.h>
 #include <asm/mach/arch.h>
@@ -115,6 +118,13 @@ struct outer_cache_fns outer_cache __read_mostly;
 EXPORT_SYMBOL(outer_cache);
 #endif
 
+/*
+ * Cached cpu_architecture() result for use by assembler code.
+ * C code should use the cpu_architecture() function instead of accessing this
+ * variable directly.
+ */
+int __cpu_architecture __read_mostly = CPU_ARCH_UNKNOWN;
+
 struct stack {
         u32 irq[3];
         u32 abt[3];
@@ -210,7 +220,7 @@ static const char *proc_arch[] = {
         "?(17)",
 };
 
-int cpu_architecture(void)
+static int __get_cpu_architecture(void)
 {
         int cpu_arch;
 
@@ -243,6 +253,13 @@ int cpu_architecture(void)
         return cpu_arch;
 }
 
+int __pure cpu_architecture(void)
+{
+        BUG_ON(__cpu_architecture == CPU_ARCH_UNKNOWN);
+
+        return __cpu_architecture;
+}
+
 static int cpu_has_aliasing_icache(unsigned int arch)
 {
         int aliasing_icache;
@@ -414,6 +431,7 @@ static void __init setup_processor(void)
         }
 
         cpu_name = list->cpu_name;
+        __cpu_architecture = __get_cpu_architecture();
 
 #ifdef MULTI_CPU
         processor = *list->proc;