lib/mpi/longlong.h: fix building with 32-bit x86

The mpi library contains some rather old inline assembly statements that
produce a lot of warnings for 32-bit x86, such as:

  lib/mpi/mpih-div.c:76:16: error: invalid use of a cast in a inline asm context requiring an l-value: remove the cast or build with -fheinous-gnu-extensions
                                  udiv_qrnnd(qp[i], n1, n1, np[i], d);
                                  ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
  lib/mpi/longlong.h:423:20: note: expanded from macro 'udiv_qrnnd'
          : "=a" ((USItype)(q)), \
                  ~~~~~~~~~~^~

There is no point in doing a type cast for the output of an inline
assembler statement, so just remove the cast here, as we have done for
other architectures in the past.

See also dea632cadd12 ("lib/mpi: fix build with clang").

Link: http://lkml.kernel.org/r/20190712090740.340186-1-arnd@arndb.de
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Cc: Stefan Agner <stefan@agner.ch>
Cc: Dmitry Kasatkin <dmitry.kasatkin@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/lib/mpi/longlong.h b/lib/mpi/longlong.h
index 08c60d10747fddc204788e75f24107805702caf4..3bb6260d8f4276e089e2cc9c1d132a214be3d9a5 100644 (file)
--- a/lib/mpi/longlong.h
+++ b/lib/mpi/longlong.h
@@ -397,8 +397,8 @@ do { \
 #define add_ssaaaa(sh, sl, ah, al, bh, bl) \
        __asm__ ("addl %5,%1\n" \
           "adcl %3,%0" \
-       : "=r" ((USItype)(sh)), \
-            "=&r" ((USItype)(sl)) \
+       : "=r" (sh), \
+            "=&r" (sl) \
        : "%0" ((USItype)(ah)), \
             "g" ((USItype)(bh)), \
             "%1" ((USItype)(al)), \
@@ -406,22 +406,22 @@ do { \
 #define sub_ddmmss(sh, sl, ah, al, bh, bl) \
        __asm__ ("subl %5,%1\n" \
           "sbbl %3,%0" \
-       : "=r" ((USItype)(sh)), \
-            "=&r" ((USItype)(sl)) \
+       : "=r" (sh), \
+            "=&r" (sl) \
        : "0" ((USItype)(ah)), \
             "g" ((USItype)(bh)), \
             "1" ((USItype)(al)), \
             "g" ((USItype)(bl)))
 #define umul_ppmm(w1, w0, u, v) \
        __asm__ ("mull %3" \
-       : "=a" ((USItype)(w0)), \
-            "=d" ((USItype)(w1)) \
+       : "=a" (w0), \
+            "=d" (w1) \
        : "%0" ((USItype)(u)), \
             "rm" ((USItype)(v)))
 #define udiv_qrnnd(q, r, n1, n0, d) \
        __asm__ ("divl %4" \
-       : "=a" ((USItype)(q)), \
-            "=d" ((USItype)(r)) \
+       : "=a" (q), \
+            "=d" (r) \
        : "0" ((USItype)(n0)), \
             "1" ((USItype)(n1)), \
             "rm" ((USItype)(d)))