lib/mpi/generic_mpih-mul1.c:37:13: error: invalid use of a cast in a inline asm context requiring an l-value: remove the cast or build with -fheinous-gnu-extensions

From: kbuild test robot
Date: Thu Apr 23 2020 - 08:03:47 EST

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Hi Dirk,

First bad commit (maybe != root cause):

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: c578ddb39e565139897124e74e5a43e56538cb33
commit: e33a814e772cdc36436c8c188d8c42d019fda639 scripts/dtc: Remove redundant YYLOC global declaration
date: 4 weeks ago
config: powerpc-randconfig-a001-20200423 (attached as .config)
compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project bbf386f02b05db017fda66875cc5edef70779244)
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install powerpc cross compiling tool for clang build
# apt-get install binutils-powerpc-linux-gnu
git checkout e33a814e772cdc36436c8c188d8c42d019fda639
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc

If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <lkp@xxxxxxxxx>

All errors (new ones prefixed by >>):

>> lib/mpi/generic_mpih-mul1.c:37:13: error: invalid use of a cast in a inline asm context requiring an l-value: remove the cast or build with -fheinous-gnu-extensions
umul_ppmm(prod_high, prod_low, s1_ptr[j], s2_limb);
~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
lib/mpi/longlong.h:790:20: note: expanded from macro 'umul_ppmm'
: "=r" ((USItype) ph) \
~~~~~~~~~~^~
1 error generated.
--
>> lib/mpi/generic_mpih-mul2.c:36:13: error: invalid use of a cast in a inline asm context requiring an l-value: remove the cast or build with -fheinous-gnu-extensions
umul_ppmm(prod_high, prod_low, s1_ptr[j], s2_limb);
~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
lib/mpi/longlong.h:790:20: note: expanded from macro 'umul_ppmm'
: "=r" ((USItype) ph) \
~~~~~~~~~~^~
1 error generated.
--
>> lib/mpi/generic_mpih-mul3.c:36:13: error: invalid use of a cast in a inline asm context requiring an l-value: remove the cast or build with -fheinous-gnu-extensions
umul_ppmm(prod_high, prod_low, s1_ptr[j], s2_limb);
~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
lib/mpi/longlong.h:790:20: note: expanded from macro 'umul_ppmm'
: "=r" ((USItype) ph) \
~~~~~~~~~~^~
1 error generated.
--
>> lib/mpi/mpih-div.c:99:16: error: invalid use of a cast in a inline asm context requiring an l-value: remove the cast or build with -fheinous-gnu-extensions
sub_ddmmss(n1, n0, n1, n0, d1, d0);
~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
lib/mpi/longlong.h:750:21: note: expanded from macro 'sub_ddmmss'
: "=r" ((USItype)(sh)), \
~~~~~~~~~~^~~
lib/mpi/mpih-div.c:99:20: error: invalid use of a cast in a inline asm context requiring an l-value: remove the cast or build with -fheinous-gnu-extensions
sub_ddmmss(n1, n0, n1, n0, d1, d0);
~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~
lib/mpi/longlong.h:751:20: note: expanded from macro 'sub_ddmmss'
"=&r" ((USItype)(sl)) \
~~~~~~~~~~^~~
>> lib/mpi/mpih-div.c:99:16: error: invalid use of a cast in a inline asm context requiring an l-value: remove the cast or build with -fheinous-gnu-extensions
sub_ddmmss(n1, n0, n1, n0, d1, d0);
~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
lib/mpi/longlong.h:757:21: note: expanded from macro 'sub_ddmmss'
: "=r" ((USItype)(sh)), \
~~~~~~~~~~^~~
lib/mpi/mpih-div.c:99:20: error: invalid use of a cast in a inline asm context requiring an l-value: remove the cast or build with -fheinous-gnu-extensions
sub_ddmmss(n1, n0, n1, n0, d1, d0);
~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~
lib/mpi/longlong.h:758:20: note: expanded from macro 'sub_ddmmss'
"=&r" ((USItype)(sl)) \
~~~~~~~~~~^~~
>> lib/mpi/mpih-div.c:99:16: error: invalid use of a cast in a inline asm context requiring an l-value: remove the cast or build with -fheinous-gnu-extensions
sub_ddmmss(n1, n0, n1, n0, d1, d0);
~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
lib/mpi/longlong.h:764:21: note: expanded from macro 'sub_ddmmss'
: "=r" ((USItype)(sh)), \
~~~~~~~~~~^~~
lib/mpi/mpih-div.c:99:20: error: invalid use of a cast in a inline asm context requiring an l-value: remove the cast or build with -fheinous-gnu-extensions
sub_ddmmss(n1, n0, n1, n0, d1, d0);
~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~
lib/mpi/longlong.h:765:20: note: expanded from macro 'sub_ddmmss'
"=&r" ((USItype)(sl)) \
~~~~~~~~~~^~~
>> lib/mpi/mpih-div.c:99:16: error: invalid use of a cast in a inline asm context requiring an l-value: remove the cast or build with -fheinous-gnu-extensions
sub_ddmmss(n1, n0, n1, n0, d1, d0);
~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
lib/mpi/longlong.h:771:21: note: expanded from macro 'sub_ddmmss'
: "=r" ((USItype)(sh)), \
~~~~~~~~~~^~~
lib/mpi/mpih-div.c:99:20: error: invalid use of a cast in a inline asm context requiring an l-value: remove the cast or build with -fheinous-gnu-extensions
sub_ddmmss(n1, n0, n1, n0, d1, d0);
~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~
lib/mpi/longlong.h:772:20: note: expanded from macro 'sub_ddmmss'
"=&r" ((USItype)(sl)) \
~~~~~~~~~~^~~
>> lib/mpi/mpih-div.c:99:16: error: invalid use of a cast in a inline asm context requiring an l-value: remove the cast or build with -fheinous-gnu-extensions
sub_ddmmss(n1, n0, n1, n0, d1, d0);
~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
lib/mpi/longlong.h:778:21: note: expanded from macro 'sub_ddmmss'
: "=r" ((USItype)(sh)), \
~~~~~~~~~~^~~
lib/mpi/mpih-div.c:99:20: error: invalid use of a cast in a inline asm context requiring an l-value: remove the cast or build with -fheinous-gnu-extensions
sub_ddmmss(n1, n0, n1, n0, d1, d0);
~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~
lib/mpi/longlong.h:779:20: note: expanded from macro 'sub_ddmmss'
"=&r" ((USItype)(sl)) \
~~~~~~~~~~^~~
lib/mpi/mpih-div.c:120:18: error: invalid use of a cast in a inline asm context requiring an l-value: remove the cast or build with -fheinous-gnu-extensions
add_ssaaaa(n1, n0, r - d0,
~~~~~~~~~~~^~~~~~~~~~~~~~~
lib/mpi/longlong.h:725:21: note: expanded from macro 'add_ssaaaa'
: "=r" ((USItype)(sh)), \
~~~~~~~~~~^~~
lib/mpi/mpih-div.c:120:22: error: invalid use of a cast in a inline asm context requiring an l-value: remove the cast or build with -fheinous-gnu-extensions
add_ssaaaa(n1, n0, r - d0,
~~~~~~~~~~~~~~~^~~~~~~~~~~
lib/mpi/longlong.h:726:20: note: expanded from macro 'add_ssaaaa'
"=&r" ((USItype)(sl)) \
~~~~~~~~~~^~~
lib/mpi/mpih-div.c:120:18: error: invalid use of a cast in a inline asm context requiring an l-value: remove the cast or build with -fheinous-gnu-extensions
add_ssaaaa(n1, n0, r - d0,
~~~~~~~~~~~^~~~~~~~~~~~~~~
lib/mpi/longlong.h:732:21: note: expanded from macro 'add_ssaaaa'
: "=r" ((USItype)(sh)), \
~~~~~~~~~~^~~
lib/mpi/mpih-div.c:120:22: error: invalid use of a cast in a inline asm context requiring an l-value: remove the cast or build with -fheinous-gnu-extensions
add_ssaaaa(n1, n0, r - d0,
~~~~~~~~~~~~~~~^~~~~~~~~~~
lib/mpi/longlong.h:733:20: note: expanded from macro 'add_ssaaaa'
"=&r" ((USItype)(sl)) \
~~~~~~~~~~^~~
lib/mpi/mpih-div.c:120:18: error: invalid use of a cast in a inline asm context requiring an l-value: remove the cast or build with -fheinous-gnu-extensions
add_ssaaaa(n1, n0, r - d0,
~~~~~~~~~~~^~~~~~~~~~~~~~~
lib/mpi/longlong.h:739:21: note: expanded from macro 'add_ssaaaa'
: "=r" ((USItype)(sh)), \
~~~~~~~~~~^~~
lib/mpi/mpih-div.c:120:22: error: invalid use of a cast in a inline asm context requiring an l-value: remove the cast or build with -fheinous-gnu-extensions
add_ssaaaa(n1, n0, r - d0,
~~~~~~~~~~~~~~~^~~~~~~~~~~
lib/mpi/longlong.h:740:20: note: expanded from macro 'add_ssaaaa'
"=&r" ((USItype)(sl)) \
~~~~~~~~~~^~~
lib/mpi/mpih-div.c:129:16: error: invalid use of a cast in a inline asm context requiring an l-value: remove the cast or build with -fheinous-gnu-extensions
umul_ppmm(n1, n0, d0, q);
~~~~~~~~~~^~~~~~~~~~~~~~
lib/mpi/longlong.h:790:20: note: expanded from macro 'umul_ppmm'
: "=r" ((USItype) ph) \
~~~~~~~~~~^~
lib/mpi/mpih-div.c:137:17: error: invalid use of a cast in a inline asm context requiring an l-value: remove the cast or build with -fheinous-gnu-extensions
sub_ddmmss(n1, n0, n1, n0, 0, d0);
~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
lib/mpi/longlong.h:750:21: note: expanded from macro 'sub_ddmmss'
: "=r" ((USItype)(sh)), \
~~~~~~~~~~^~~
lib/mpi/mpih-div.c:137:21: error: invalid use of a cast in a inline asm context requiring an l-value: remove the cast or build with -fheinous-gnu-extensions
sub_ddmmss(n1, n0, n1, n0, 0, d0);
~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~
lib/mpi/longlong.h:751:20: note: expanded from macro 'sub_ddmmss'
"=&r" ((USItype)(sl)) \
~~~~~~~~~~^~~
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.

vim +37 lib/mpi/generic_mpih-mul1.c

cdec9cb5167ab1 Dmitry Kasatkin 2011-08-31 18
cdec9cb5167ab1 Dmitry Kasatkin 2011-08-31 19 mpi_limb_t
cdec9cb5167ab1 Dmitry Kasatkin 2011-08-31 20 mpihelp_mul_1(mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr, mpi_size_t s1_size,
cdec9cb5167ab1 Dmitry Kasatkin 2011-08-31 21 mpi_limb_t s2_limb)
cdec9cb5167ab1 Dmitry Kasatkin 2011-08-31 22 {
cdec9cb5167ab1 Dmitry Kasatkin 2011-08-31 23 mpi_limb_t cy_limb;
cdec9cb5167ab1 Dmitry Kasatkin 2011-08-31 24 mpi_size_t j;
cdec9cb5167ab1 Dmitry Kasatkin 2011-08-31 25 mpi_limb_t prod_high, prod_low;
cdec9cb5167ab1 Dmitry Kasatkin 2011-08-31 26
cdec9cb5167ab1 Dmitry Kasatkin 2011-08-31 27 /* The loop counter and index J goes from -S1_SIZE to -1. This way
cdec9cb5167ab1 Dmitry Kasatkin 2011-08-31 28 * the loop becomes faster. */
cdec9cb5167ab1 Dmitry Kasatkin 2011-08-31 29 j = -s1_size;
cdec9cb5167ab1 Dmitry Kasatkin 2011-08-31 30
cdec9cb5167ab1 Dmitry Kasatkin 2011-08-31 31 /* Offset the base pointers to compensate for the negative indices. */
cdec9cb5167ab1 Dmitry Kasatkin 2011-08-31 32 s1_ptr -= j;
cdec9cb5167ab1 Dmitry Kasatkin 2011-08-31 33 res_ptr -= j;
cdec9cb5167ab1 Dmitry Kasatkin 2011-08-31 34
cdec9cb5167ab1 Dmitry Kasatkin 2011-08-31 35 cy_limb = 0;
cdec9cb5167ab1 Dmitry Kasatkin 2011-08-31 36 do {
cdec9cb5167ab1 Dmitry Kasatkin 2011-08-31 @37 umul_ppmm(prod_high, prod_low, s1_ptr[j], s2_limb);

:::::: The code at line 37 was first introduced by commit
:::::: cdec9cb5167ab1113ba9c58e395f664d9d3f9acb crypto: GnuPG based MPI lib - source files (part 1)

:::::: TO: Dmitry Kasatkin <dmitry.kasatkin@xxxxxxxxx>
:::::: CC: Dmitry Kasatkin <dmitry.kasatkin@xxxxxxxxx>

---
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Next in thread: Nathan Chancellor: "Re: lib/mpi/generic_mpih-mul1.c:37:13: error: invalid use of a cast in a inline asm context requiring an l-value: remove the cast or build with -fheinous-gnu-extensions"
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