alpha: move __udiv_qrnnd library function to arch/alpha/lib/

We already had the implementation for __udiv_qrnnd (unsigned divide for
multi-precision arithmetic) as part of the alpha math emulation code.

But you can disable the math emulation code - even if you shouldn't -
and then the MPI code that actually wants this functionality (and is
needed by various crypto functions) will fail to build.

So move the extended-precision divide code to be a regular library
function, just like all the regular division code is.  That way ie is
available regardless of math-emulation.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/alpha/include/asm/asm-prototypes.h

@@ -16,3 +16,4 @@ extern void __divlu(void);
 extern void __remlu(void);
 extern void __divqu(void);
 extern void __remqu(void);
+extern unsigned long __udiv_qrnnd(unsigned long *, unsigned long, unsigned long , unsigned long);

arch/alpha/lib/Makefile

@@ -14,6 +14,7 @@ ev6-$(CONFIG_ALPHA_EV6) := ev6-
 ev67-$(CONFIG_ALPHA_EV67) := ev67-
 
 lib-y =	__divqu.o __remqu.o __divlu.o __remlu.o \
+	udiv-qrnnd.o \
 	udelay.o \
 	$(ev6-y)memset.o \
 	$(ev6-y)memcpy.o \

arch/alpha/math-emu/qrnnd.S → arch/alpha/lib/udiv-qrnnd.S

@@ -25,6 +25,7 @@
  # along with GCC; see the file COPYING.  If not, write to the 
  # Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  # MA 02111-1307, USA.
+#include <asm/export.h>
 
         .set noreorder
         .set noat
@@ -161,3 +162,4 @@ $Odd:
 	ret	$31,($26),1
 
 	.end	__udiv_qrnnd
+EXPORT_SYMBOL(__udiv_qrnnd)

arch/alpha/math-emu/Makefile

@@ -7,4 +7,4 @@ ccflags-y := -w
 
 obj-$(CONFIG_MATHEMU) += math-emu.o
 
-math-emu-objs := math.o qrnnd.o
+math-emu-objs := math.o

arch/alpha/math-emu/math.c

@@ -403,5 +403,3 @@ alpha_fp_emul_imprecise (struct pt_regs *regs, unsigned long write_mask)
 egress:
 	return si_code;
 }
-
-EXPORT_SYMBOL(__udiv_qrnnd);