Re: arch/riscv/include/asm/pgtable-64.h:210:2: error: invalid input constraint '0' in asm

[Heiko Stübner]

Hi,

Am Sonntag, 5. Juni 2022, 15:20:08 CEST schrieb kernel test robot:
> Hi Heiko,
> 
> FYI, the error/warning still remains.

the pending change [0] fixes that issue, so should hopefully make it into
one of the next -rc kernels.

Heiko


[0] https://lore.kernel.org/all/20220518184529.454008-1-nathan@xxxxxxxxxx/

> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   952923ddc01120190dcf671e7b354364ce1d1362
> commit: a35707c3d850dda0ceefb75b1b3bd191921d5765 riscv: add memory-type errata for T-Head
> date:   3 weeks ago
> config: riscv-randconfig-r015-20220605 (https://download.01.org/0day-ci/archive/20220605/202206052118.lfENADgr-lkp@xxxxxxxxx/config)
> compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 416a5080d89066029f9889dc23f94de47c2fa895)
> reproduce (this is a W=1 build):
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # install riscv cross compiling tool for clang build
>         # apt-get install binutils-riscv64-linux-gnu
>         # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a35707c3d850dda0ceefb75b1b3bd191921d5765
>         git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>         git fetch --no-tags linus master
>         git checkout a35707c3d850dda0ceefb75b1b3bd191921d5765
>         # save the config file
>         mkdir build_dir && cp config build_dir/.config
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv prepare
> 
> If you fix the issue, kindly add following tag where applicable
> Reported-by: kernel test robot <lkp@xxxxxxxxx>
> 
> All errors (new ones prefixed by >>):
> 
>    In file included from arch/riscv/kernel/asm-offsets.c:10:
>    In file included from include/linux/mm.h:29:
>    In file included from include/linux/pgtable.h:6:
>    In file included from arch/riscv/include/asm/pgtable.h:114:
> >> arch/riscv/include/asm/pgtable-64.h:210:2: error: invalid input constraint '0' in asm
>            ALT_THEAD_PMA(prot_val);
>            ^
>    arch/riscv/include/asm/errata_list.h:88:4: note: expanded from macro 'ALT_THEAD_PMA'
>            : "0"(_val),                                                    \
>              ^
>    In file included from arch/riscv/kernel/asm-offsets.c:10:
>    In file included from include/linux/mm.h:700:
>    In file included from include/linux/huge_mm.h:8:
>    In file included from include/linux/fs.h:33:
>    In file included from include/linux/percpu-rwsem.h:7:
>    In file included from include/linux/rcuwait.h:6:
>    In file included from include/linux/sched/signal.h:6:
>    include/linux/signal.h:97:11: warning: array index 3 is past the end of the array (which contains 1 element) [-Warray-bounds]
>                    return (set->sig[3] | set->sig[2] |
>                            ^        ~
>    include/uapi/asm-generic/signal.h:62:2: note: array 'sig' declared here
>            unsigned long sig[_NSIG_WORDS];
>            ^
>    In file included from arch/riscv/kernel/asm-offsets.c:10:
>    In file included from include/linux/mm.h:700:
>    In file included from include/linux/huge_mm.h:8:
>    In file included from include/linux/fs.h:33:
>    In file included from include/linux/percpu-rwsem.h:7:
>    In file included from include/linux/rcuwait.h:6:
>    In file included from include/linux/sched/signal.h:6:
>    include/linux/signal.h:97:25: warning: array index 2 is past the end of the array (which contains 1 element) [-Warray-bounds]
>                    return (set->sig[3] | set->sig[2] |
>                                          ^        ~
>    include/uapi/asm-generic/signal.h:62:2: note: array 'sig' declared here
>            unsigned long sig[_NSIG_WORDS];
>            ^
>    In file included from arch/riscv/kernel/asm-offsets.c:10:
>    In file included from include/linux/mm.h:700:
>    In file included from include/linux/huge_mm.h:8:
>    In file included from include/linux/fs.h:33:
>    In file included from include/linux/percpu-rwsem.h:7:
>    In file included from include/linux/rcuwait.h:6:
>    In file included from include/linux/sched/signal.h:6:
>    include/linux/signal.h:98:4: warning: array index 1 is past the end of the array (which contains 1 element) [-Warray-bounds]
>                            set->sig[1] | set->sig[0]) == 0;
>                            ^        ~
>    include/uapi/asm-generic/signal.h:62:2: note: array 'sig' declared here
>            unsigned long sig[_NSIG_WORDS];
>            ^
>    In file included from arch/riscv/kernel/asm-offsets.c:10:
>    In file included from include/linux/mm.h:700:
>    In file included from include/linux/huge_mm.h:8:
>    In file included from include/linux/fs.h:33:
>    In file included from include/linux/percpu-rwsem.h:7:
>    In file included from include/linux/rcuwait.h:6:
>    In file included from include/linux/sched/signal.h:6:
>    include/linux/signal.h:100:11: warning: array index 1 is past the end of the array (which contains 1 element) [-Warray-bounds]
>                    return (set->sig[1] | set->sig[0]) == 0;
>                            ^        ~
>    include/uapi/asm-generic/signal.h:62:2: note: array 'sig' declared here
>            unsigned long sig[_NSIG_WORDS];
>            ^
>    In file included from arch/riscv/kernel/asm-offsets.c:10:
>    In file included from include/linux/mm.h:700:
>    In file included from include/linux/huge_mm.h:8:
>    In file included from include/linux/fs.h:33:
>    In file included from include/linux/percpu-rwsem.h:7:
>    In file included from include/linux/rcuwait.h:6:
>    In file included from include/linux/sched/signal.h:6:
>    include/linux/signal.h:113:11: warning: array index 3 is past the end of the array (which contains 1 element) [-Warray-bounds]
>                    return  (set1->sig[3] == set2->sig[3]) &&
>                             ^         ~
>    include/uapi/asm-generic/signal.h:62:2: note: array 'sig' declared here
>            unsigned long sig[_NSIG_WORDS];
>            ^
>    In file included from arch/riscv/kernel/asm-offsets.c:10:
>    In file included from include/linux/mm.h:700:
>    In file included from include/linux/huge_mm.h:8:
>    In file included from include/linux/fs.h:33:
>    In file included from include/linux/percpu-rwsem.h:7:
>    In file included from include/linux/rcuwait.h:6:
>    In file included from include/linux/sched/signal.h:6:
>    include/linux/signal.h:113:27: warning: array index 3 is past the end of the array (which contains 1 element) [-Warray-bounds]
>                    return  (set1->sig[3] == set2->sig[3]) &&
>                                             ^         ~
>    include/uapi/asm-generic/signal.h:62:2: note: array 'sig' declared here
>            unsigned long sig[_NSIG_WORDS];
>            ^
>    In file included from arch/riscv/kernel/asm-offsets.c:10:
>    In file included from include/linux/mm.h:700:
>    In file included from include/linux/huge_mm.h:8:
>    In file included from include/linux/fs.h:33:
>    In file included from include/linux/percpu-rwsem.h:7:
>    In file included from include/linux/rcuwait.h:6:
>    In file included from include/linux/sched/signal.h:6:
>    include/linux/signal.h:114:5: warning: array index 2 is past the end of the array (which contains 1 element) [-Warray-bounds]
>                            (set1->sig[2] == set2->sig[2]) &&
>                             ^         ~
>    include/uapi/asm-generic/signal.h:62:2: note: array 'sig' declared here
>            unsigned long sig[_NSIG_WORDS];
>            ^
>    In file included from arch/riscv/kernel/asm-offsets.c:10:
>    In file included from include/linux/mm.h:700:
>    In file included from include/linux/huge_mm.h:8:
>    In file included from include/linux/fs.h:33:
> 
> 
> vim +/0 +210 arch/riscv/include/asm/pgtable-64.h
> 
>    205	
>    206	static inline pmd_t pfn_pmd(unsigned long pfn, pgprot_t prot)
>    207	{
>    208		unsigned long prot_val = pgprot_val(prot);
>    209	
>  > 210		ALT_THEAD_PMA(prot_val);
>    211	
>    212		return __pmd((pfn << _PAGE_PFN_SHIFT) | prot_val);
>    213	}
>    214	
> 
>