ARM: 6429/1: Check for is_smp for tlb_ops and cache_ops broadcast

Broadcast should not be needed when running SMP kernel on UP systems.

Also, this fixes an undefined instruction for SMP_ON_UP on earlier ARM
cores without the extended CPUID_EXT_MMFR3 register.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 17 insertions, 11 deletions

diff --git a/arch/arm/include/asm/smp_plat.h b/arch/arm/include/asm/smp_plat.h
index 7de5aa56c18b..7f4e6633f753 100644
--- a/arch/arm/include/asm/smp_plat.h
+++ b/arch/arm/include/asm/smp_plat.h
@@ -7,17 +7,6 @@
 
 #include <asm/cputype.h>
 
-/* all SMP configurations have the extended CPUID registers */
-static inline int tlb_ops_need_broadcast(void)
-{
-        return ((read_cpuid_ext(CPUID_EXT_MMFR3) >> 12) & 0xf) < 2;
-}
-
-static inline int cache_ops_need_broadcast(void)
-{
-        return ((read_cpuid_ext(CPUID_EXT_MMFR3) >> 12) & 0xf) < 1;
-}
-
 /*
  * Return true if we are running on a SMP platform
  */
@@ -33,4 +22,21 @@ static inline bool is_smp(void)
 #endif
 }
 
+/* all SMP configurations have the extended CPUID registers */
+static inline int tlb_ops_need_broadcast(void)
+{
+        if (!is_smp())
+                return 0;
+
+        return ((read_cpuid_ext(CPUID_EXT_MMFR3) >> 12) & 0xf) < 2;
+}
+
+static inline int cache_ops_need_broadcast(void)
+{
+        if (!is_smp())
+                return 0;
+
+        return ((read_cpuid_ext(CPUID_EXT_MMFR3) >> 12) & 0xf) < 1;
+}
+
 #endif