Patch "MPI: Fix compilation on MIPS with GCC 4.4 and newer" has been added to the 3.4-stable tree

This is a note to let you know that I've just added the patch titled

MPI: Fix compilation on MIPS with GCC 4.4 and newer

to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
mpi-fix-compilation-on-mips-with-gcc-4.4-and-newer.patch
and it can be found in the queue-3.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From a3cea9894157c20a5b1ec08b7e0b5f2019740c10 Mon Sep 17 00:00:00 2001
From: Manuel Lauss <[email protected]>
Date: Thu, 22 Nov 2012 11:58:22 +0100
Subject: MPI: Fix compilation on MIPS with GCC 4.4 and newer

From: Manuel Lauss <[email protected]>

commit a3cea9894157c20a5b1ec08b7e0b5f2019740c10 upstream.

Since 4.4 GCC on MIPS no longer recognizes the "h" constraint, leading to this build failure:

CC lib/mpi/generic_mpih-mul1.o
lib/mpi/generic_mpih-mul1.c: In function 'mpihelp_mul_1':
lib/mpi/generic_mpih-mul1.c:50:3: error: impossible constraint in 'asm'

This patch updates MPI with the latest umul_ppm implementations for MIPS.

Patchwork: https://patchwork.linux-mips.org/patch/4612/

---
 lib/mpi/longlong.h |   19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

@@ -703,7 +703,14 @@ do { \
 	**************  MIPS  *****************
 	***************************************/
 #if defined(__mips__) && W_TYPE_SIZE == 32
-#if __GNUC__ > 2 || __GNUC_MINOR__ >= 7
+#if __GNUC__ >= 4 && __GNUC_MINOR__ >= 4
+#define umul_ppmm(w1, w0, u, v)			\
+do {						\
+	UDItype __ll = (UDItype)(u) * (v);	\
+	w1 = __ll >> 32;			\
+	w0 = __ll;				\
+} while (0)
+#elif __GNUC__ > 2 || __GNUC_MINOR__ >= 7
 #define umul_ppmm(w1, w0, u, v) \
 	__asm__ ("multu %2,%3" \
 	: "=l" ((USItype)(w0)), \

@@ -728,7 +735,15 @@ do { \
 	**************  MIPS/64  **************
 	***************************************/
 #if (defined(__mips) && __mips >= 3) && W_TYPE_SIZE == 64
-#if __GNUC__ > 2 || __GNUC_MINOR__ >= 7
+#if __GNUC__ >= 4 && __GNUC_MINOR__ >= 4
+#define umul_ppmm(w1, w0, u, v) \
+do {									\
+	typedef unsigned int __ll_UTItype __attribute__((mode(TI)));	\
+	__ll_UTItype __ll = (__ll_UTItype)(u) * (v);			\
+	w1 = __ll >> 64;						\
+	w0 = __ll;							\
+} while (0)
+#elif __GNUC__ > 2 || __GNUC_MINOR__ >= 7
 #define umul_ppmm(w1, w0, u, v) \
 	__asm__ ("dmultu %2,%3" \
 	: "=l" ((UDItype)(w0)), \

Patches currently in stable-queue which might be from [email protected] are

queue-3.4/mpi-fix-compilation-on-mips-with-gcc-4.4-and-newer.patch