[PATCH] parisc: Replace sync instruction by nop on UP kernel

[Helge Deller <deller@xxxxxx>]

Signed-off-by: Helge Deller <deller@xxxxxx>

diff --git a/arch/parisc/include/asm/barrier.h b/arch/parisc/include/asm/barrier.h
index dbaaca84f27f..43bcdccc56b8 100644
--- a/arch/parisc/include/asm/barrier.h
+++ b/arch/parisc/include/asm/barrier.h
@@ -6,7 +6,8 @@
 
 /* The synchronize caches instruction executes as a nop on systems in
    which all memory references are performed in order. */
-#define synchronize_caches() __asm__ __volatile__ ("sync" : : : "memory")
+#define synchronize_caches() asm volatile \
+	("sync" ALTERNATIVE(ALT_COND_NO_SMP, INSN_NOP) : : : "memory")
 
 #if defined(CONFIG_SMP)
 #define mb()		do { synchronize_caches(); } while (0)