Blackfin arch: use do_div() for the 64bit division as pointed out by …

…Bernd

If you need a 64 bit divide in the kernel, use asm/div64.h.
Revert the addition of udivdi3.

Cc: Bernd Schmidt <bernd.schmidt@analog.com>
Signed-off-by: Mike Frysinger <michael.frysinger@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>

arch/blackfin/kernel/setup.c

@@ -43,6 +43,7 @@
 #include <asm/cacheflush.h>
 #include <asm/blackfin.h>
 #include <asm/cplbinit.h>
+#include <asm/div64.h>
 #include <asm/fixed_code.h>
 #include <asm/early_printk.h>
 
@@ -504,13 +505,17 @@ EXPORT_SYMBOL(get_sclk);
 
 unsigned long sclk_to_usecs(unsigned long sclk)
 {
-	return (USEC_PER_SEC * (u64)sclk) / get_sclk();
+	u64 tmp = USEC_PER_SEC * (u64)sclk;
+	do_div(tmp, get_sclk());
+	return tmp;
 }
 EXPORT_SYMBOL(sclk_to_usecs);
 
 unsigned long usecs_to_sclk(unsigned long usecs)
 {
-	return (get_sclk() * (u64)usecs) / USEC_PER_SEC;
+	u64 tmp = get_sclk() * (u64)usecs;
+	do_div(tmp, USEC_PER_SEC);
+	return tmp;
 }
 EXPORT_SYMBOL(usecs_to_sclk);
 

arch/blackfin/lib/Makefile

@@ -4,7 +4,7 @@
 
 lib-y := \
 	ashldi3.o ashrdi3.o lshrdi3.o \
-	muldi3.o divsi3.o udivsi3.o udivdi3.o modsi3.o umodsi3.o \
+	muldi3.o divsi3.o udivsi3.o modsi3.o umodsi3.o \
 	checksum.o memcpy.o memset.o memcmp.o memchr.o memmove.o \
 	strcmp.o strcpy.o strncmp.o strncpy.o \
 	umulsi3_highpart.o smulsi3_highpart.o \