diff --git a/arch/blackfin/Makefile b/arch/blackfin/Makefile
index 3c87291bcdab..f7cac7c51e7e 100644
--- a/arch/blackfin/Makefile
+++ b/arch/blackfin/Makefile
@@ -12,8 +12,8 @@ LDFLAGS_vmlinux  := -X
 OBJCOPYFLAGS     := -O binary -R .note -R .comment -S
 GZFLAGS          := -9
 
-CFLAGS           += $(call cc-option,-mno-fdpic)
-AFLAGS           += $(call cc-option,-mno-fdpic)
+KBUILD_CFLAGS           += $(call cc-option,-mno-fdpic)
+KBUILD_AFLAGS           += $(call cc-option,-mno-fdpic)
 CFLAGS_MODULE    += -mlong-calls
 KALLSYMS         += --symbol-prefix=_
 
diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c
index 0e746449c29b..f1b059e5a06c 100644
--- a/arch/blackfin/kernel/setup.c
+++ b/arch/blackfin/kernel/setup.c
@@ -501,7 +501,7 @@ EXPORT_SYMBOL(sclk_to_usecs);
 
 unsigned long usecs_to_sclk(unsigned long usecs)
 {
-	return get_sclk() / (USEC_PER_SEC * (u64)usecs);
+	return (get_sclk() * (u64)usecs) / USEC_PER_SEC;
 }
 EXPORT_SYMBOL(usecs_to_sclk);
 
@@ -589,7 +589,7 @@ static int show_cpuinfo(struct seq_file *m, void *v)
 #elif defined CONFIG_BFIN_WT
 		"wt"
 #endif
-		, 0);
+		"", 0);
 
 	seq_printf(m, "%s\n", cache);