[csky-linux:riscv_compat_v6_svpbmt-v6 35/35] arch/riscv/include/asm/pgtable-64.h:105:2: error: expected assembly-time absolute expression

Friday, 11 February 2022

tree:   https://github.com/c-sky/csky-linux riscv_compat_v6_svpbmt-v6
head:   54acb36c958fc990cc59889f79c8ddca7386c295
commit: 54acb36c958fc990cc59889f79c8ddca7386c295 [35/35] riscv: xtpbmt: Fixup T-HEAD CPU
_PAGE_KERNEL quirks
config: riscv-randconfig-c006-20220209
(https://download.01.org/0day-ci/archive/20220211/202202110254.CrnRD2CM-lk...)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project
aa845d7a245d85c441d0bd44fc7b6c3be8f3de8d)
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://github.com/c-sky/csky-linux/commit/54acb36c958fc990cc59889f79c8dd...
        git remote add csky-linux https://github.com/c-sky/csky-linux
        git fetch --no-tags csky-linux riscv_compat_v6_svpbmt-v6
        git checkout 54acb36c958fc990cc59889f79c8ddca7386c295
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir
ARCH=riscv SHELL=/bin/bash arch/riscv/kernel/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com&gt;

All errors (new ones prefixed by >>):

   In file included from arch/riscv/kernel/setup.c:21:
   In file included from include/linux/efi.h:20:
   In file included from include/linux/rtc.h:17:
   In file included from include/linux/interrupt.h:11:
   In file included from include/linux/hardirq.h:11:
   In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
   In file included from include/asm-generic/hardirq.h:17:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:13:
   In file included from arch/riscv/include/asm/io.h:136:
   include/asm-generic/io.h:464:31: warning: performing pointer arithmetic on a null
pointer has undefined behavior [-Wnull-pointer-arithmetic]
           val = __raw_readb(PCI_IOBASE + addr);
                             ~~~~~~~~~~ ^
   include/asm-generic/io.h:477:61: warning: performing pointer arithmetic on a null
pointer has undefined behavior [-Wnull-pointer-arithmetic]
           val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                           ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro
'__le16_to_cpu'
   #define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                     ^
   In file included from arch/riscv/kernel/setup.c:21:
   In file included from include/linux/efi.h:20:
   In file included from include/linux/rtc.h:17:
   In file included from include/linux/interrupt.h:11:
   In file included from include/linux/hardirq.h:11:
   In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
   In file included from include/asm-generic/hardirq.h:17:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:13:
   In file included from arch/riscv/include/asm/io.h:136:
   include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null
pointer has undefined behavior [-Wnull-pointer-arithmetic]
           val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                           ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro
'__le32_to_cpu'
   #define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                     ^
   In file included from arch/riscv/kernel/setup.c:21:
   In file included from include/linux/efi.h:20:
   In file included from include/linux/rtc.h:17:
   In file included from include/linux/interrupt.h:11:
   In file included from include/linux/hardirq.h:11:
   In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
   In file included from include/asm-generic/hardirq.h:17:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:13:
   In file included from arch/riscv/include/asm/io.h:136:
   include/asm-generic/io.h:501:33: warning: performing pointer arithmetic on a null
pointer has undefined behavior [-Wnull-pointer-arithmetic]
           __raw_writeb(value, PCI_IOBASE + addr);
                               ~~~~~~~~~~ ^
   include/asm-generic/io.h:511:59: warning: performing pointer arithmetic on a null
pointer has undefined behavior [-Wnull-pointer-arithmetic]
           __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                         ~~~~~~~~~~ ^
   include/asm-generic/io.h:521:59: warning: performing pointer arithmetic on a null
pointer has undefined behavior [-Wnull-pointer-arithmetic]
           __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                         ~~~~~~~~~~ ^
   include/asm-generic/io.h:1024:55: warning: performing pointer arithmetic on a null
pointer has undefined behavior [-Wnull-pointer-arithmetic]
           return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                     ~~~~~~~~~~ ^
   In file included from arch/riscv/kernel/setup.c:12:
   In file included from include/linux/mm.h:33:
   In file included from include/linux/pgtable.h:6:
   In file included from arch/riscv/include/asm/pgtable.h:111:
...
> arch/riscv/include/asm/pgtable-64.h:105:2: error: expected
assembly-time absolute expression            ALT_SVPBMT(val, _PAGE_NOCACHE);
           ^
   arch/riscv/include/asm/errata_list.h:52:5: note: expanded from macro
'ALT_SVPBMT'
   asm(ALTERNATIVE_2("li %0, 0\t\nnop",                                         
          \
       ^
   arch/riscv/include/asm/alternative-macros.h:147:2: note: expanded from macro
'ALTERNATIVE_2'
           _ALTERNATIVE_CFG_2(old_content, new_content_1, vendor_id_1, errata_id_1,
CONFIG_k_1, \
           ^
   arch/riscv/include/asm/alternative-macros.h:117:2: note: expanded from macro
'_ALTERNATIVE_CFG_2'
           __ALTERNATIVE_CFG_2(old_c, new_c_1, vendor_id_1, errata_id_1,
IS_ENABLED(CONFIG_k_1),   \
           ^
   arch/riscv/include/asm/alternative-macros.h:112:2: note: expanded from macro
'__ALTERNATIVE_CFG_2'
           ALT_NEW_CONTENT(vendor_id_1, errata_id_1, enable_1, new_c_1)    \
           ^
   arch/riscv/include/asm/alternative-macros.h:88:3: note: expanded from macro
'ALT_NEW_CONTENT'
           ".org   . - (887b - 886b) + (889b - 888b)\n"                    \
            ^
   <inline asm>:25:6: note: instantiated into assembly here
   .org    . - (887b - 886b) + (889b - 888b)
           ^
   In file included from arch/riscv/kernel/setup.c:12:
   In file included from include/linux/mm.h:33:
   In file included from include/linux/pgtable.h:6:
   In file included from arch/riscv/include/asm/pgtable.h:111:
...
> arch/riscv/include/asm/pgtable-64.h:105:2: error: expected
assembly-time absolute expression            ALT_SVPBMT(val, _PAGE_NOCACHE);
           ^
   arch/riscv/include/asm/errata_list.h:52:5: note: expanded from macro
'ALT_SVPBMT'
   asm(ALTERNATIVE_2("li %0, 0\t\nnop",                                         
          \
       ^
   arch/riscv/include/asm/alternative-macros.h:147:2: note: expanded from macro
'ALTERNATIVE_2'
           _ALTERNATIVE_CFG_2(old_content, new_content_1, vendor_id_1, errata_id_1,
CONFIG_k_1, \
           ^
   arch/riscv/include/asm/alternative-macros.h:117:2: note: expanded from macro
'_ALTERNATIVE_CFG_2'
           __ALTERNATIVE_CFG_2(old_c, new_c_1, vendor_id_1, errata_id_1,
IS_ENABLED(CONFIG_k_1),   \
           ^
   arch/riscv/include/asm/alternative-macros.h:112:2: note: expanded from macro
'__ALTERNATIVE_CFG_2'
           ALT_NEW_CONTENT(vendor_id_1, errata_id_1, enable_1, new_c_1)    \
           ^
   arch/riscv/include/asm/alternative-macros.h:89:3: note: expanded from macro
'ALT_NEW_CONTENT'
           ".org   . - (889b - 888b) + (887b - 886b)\n"                    \
            ^
   <inline asm>:26:6: note: instantiated into assembly here
   .org    . - (889b - 888b) + (887b - 886b)
           ^
   7 warnings and 2 errors generated.

vim +105 arch/riscv/include/asm/pgtable-64.h

54acb36c958fc9 Guo Ren 2022-02-10  100  
bac41a3372f958 Wei Fu  2021-11-29  101  static inline u64 riscv_page_nocache(void)
bac41a3372f958 Wei Fu  2021-11-29  102  {
bac41a3372f958 Wei Fu  2021-11-29  103  	u64 val;
bac41a3372f958 Wei Fu  2021-11-29  104  
bac41a3372f958 Wei Fu  2021-11-29 @105  	ALT_SVPBMT(val, _PAGE_NOCACHE);
bac41a3372f958 Wei Fu  2021-11-29  106  	return val;
bac41a3372f958 Wei Fu  2021-11-29  107  }
bac41a3372f958 Wei Fu  2021-11-29  108  

:::::: The code at line 105 was first introduced by commit
:::::: bac41a3372f9586652716665df9da6c4059b9309 riscv: add RISC-V Svpbmt extension
support

:::::: TO: Wei Fu <wefu(a)redhat.com&gt;
:::::: CC: Guo Ren <guoren(a)linux.alibaba.com&gt;

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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