Re: [PATCH 02/19] elf: Move arch_setup_additional_pages() to generic elf.h

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Hi Dmitry,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on c34f157421f6905e6b4a79a312e9175dce2bc607]

url:    https://github.com/0day-ci/linux/commits/Dmitry-Safonov/Add-generic-user_landing-tracking/20201109-090354
base:    c34f157421f6905e6b4a79a312e9175dce2bc607
config: riscv-randconfig-r026-20201109 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 09ec07827b1128504457a93dee80b2ceee1af600)
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/0day-ci/linux/commit/c46ac7ddea192a97f9b0b3aa3536566a37389bec
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Dmitry-Safonov/Add-generic-user_landing-tracking/20201109-090354
        git checkout c46ac7ddea192a97f9b0b3aa3536566a37389bec
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv 

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

All warnings (new ones prefixed by >>):

   #ifndef _ASM_RISCV_ELF_H
    ^
   In file included from arch/riscv/kernel/traps_misaligned.c:9:
   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:149:
   include/asm-generic/io.h:556:9: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           return inb(addr);
                  ^~~~~~~~~
   arch/riscv/include/asm/io.h:55:76: note: expanded from macro 'inb'
   #define inb(c)          ({ u8  __v; __io_pbr(); __v = readb_cpu((void*)(PCI_IOBASE + (c))); __io_par(__v); __v; })
                                                                           ~~~~~~~~~~ ^
   arch/riscv/include/asm/mmio.h:87:48: note: expanded from macro 'readb_cpu'
   #define readb_cpu(c)            ({ u8  __r = __raw_readb(c); __r; })
                                                            ^
   In file included from arch/riscv/kernel/traps_misaligned.c:9:
   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:149:
   include/asm-generic/io.h:564:9: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           return inw(addr);
                  ^~~~~~~~~
   arch/riscv/include/asm/io.h:56:76: note: expanded from macro 'inw'
   #define inw(c)          ({ u16 __v; __io_pbr(); __v = readw_cpu((void*)(PCI_IOBASE + (c))); __io_par(__v); __v; })
                                                                           ~~~~~~~~~~ ^
   arch/riscv/include/asm/mmio.h:88:76: note: expanded from macro 'readw_cpu'
   #define readw_cpu(c)            ({ u16 __r = le16_to_cpu((__force __le16)__raw_readw(c)); __r; })
                                                                                        ^
   include/uapi/linux/byteorder/little_endian.h:36:51: note: expanded from macro '__le16_to_cpu'
   #define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                     ^
   In file included from arch/riscv/kernel/traps_misaligned.c:9:
   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:149:
   include/asm-generic/io.h:572:9: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           return inl(addr);
                  ^~~~~~~~~
   arch/riscv/include/asm/io.h:57:76: note: expanded from macro 'inl'
   #define inl(c)          ({ u32 __v; __io_pbr(); __v = readl_cpu((void*)(PCI_IOBASE + (c))); __io_par(__v); __v; })
                                                                           ~~~~~~~~~~ ^
   arch/riscv/include/asm/mmio.h:89:76: note: expanded from macro 'readl_cpu'
   #define readl_cpu(c)            ({ u32 __r = le32_to_cpu((__force __le32)__raw_readl(c)); __r; })
                                                                                        ^
   include/uapi/linux/byteorder/little_endian.h:34:51: note: expanded from macro '__le32_to_cpu'
   #define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                     ^
   In file included from arch/riscv/kernel/traps_misaligned.c:9:
   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:149:
   include/asm-generic/io.h:580:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           outb(value, addr);
           ^~~~~~~~~~~~~~~~~
   arch/riscv/include/asm/io.h:59:68: note: expanded from macro 'outb'
   #define outb(v,c)       ({ __io_pbw(); writeb_cpu((v),(void*)(PCI_IOBASE + (c))); __io_paw(); })
                                                                 ~~~~~~~~~~ ^
   arch/riscv/include/asm/mmio.h:91:52: note: expanded from macro 'writeb_cpu'
   #define writeb_cpu(v, c)        ((void)__raw_writeb((v), (c)))
                                                             ^
   In file included from arch/riscv/kernel/traps_misaligned.c:9:
   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:149:
   include/asm-generic/io.h:588:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           outw(value, addr);
           ^~~~~~~~~~~~~~~~~
   arch/riscv/include/asm/io.h:60:68: note: expanded from macro 'outw'
   #define outw(v,c)       ({ __io_pbw(); writew_cpu((v),(void*)(PCI_IOBASE + (c))); __io_paw(); })
                                                                 ~~~~~~~~~~ ^
   arch/riscv/include/asm/mmio.h:92:76: note: expanded from macro 'writew_cpu'
   #define writew_cpu(v, c)        ((void)__raw_writew((__force u16)cpu_to_le16(v), (c)))
                                                                                     ^
   In file included from arch/riscv/kernel/traps_misaligned.c:9:
   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:149:
   include/asm-generic/io.h:596:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           outl(value, addr);
           ^~~~~~~~~~~~~~~~~
   arch/riscv/include/asm/io.h:61:68: note: expanded from macro 'outl'
   #define outl(v,c)       ({ __io_pbw(); writel_cpu((v),(void*)(PCI_IOBASE + (c))); __io_paw(); })
                                                                 ~~~~~~~~~~ ^
   arch/riscv/include/asm/mmio.h:93:76: note: expanded from macro 'writel_cpu'
   #define writel_cpu(v, c)        ((void)__raw_writel((__force u32)cpu_to_le32(v), (c)))
                                                                                     ^
   In file included from arch/riscv/kernel/traps_misaligned.c:9:
   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:149:
   include/asm-generic/io.h:1005:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                     ~~~~~~~~~~ ^
   arch/riscv/kernel/traps_misaligned.c:240:5: warning: no previous prototype for function 'handle_misaligned_load' [-Wmissing-prototypes]
   int handle_misaligned_load(struct pt_regs *regs)
       ^
   arch/riscv/kernel/traps_misaligned.c:240:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int handle_misaligned_load(struct pt_regs *regs)
   ^
   static 
>> arch/riscv/kernel/traps_misaligned.c:316:2: warning: shift count is negative [-Wshift-count-negative]
           SET_RD(insn, regs, val.data_ulong << shift >> shift);
           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/riscv/kernel/traps_misaligned.c:142:36: note: expanded from macro 'SET_RD'
   #define SET_RD(insn, regs, val)         (*REG_PTR(insn, SH_RD, regs) = (val))
                                             ^~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/riscv/kernel/traps_misaligned.c:132:28: note: expanded from macro 'REG_PTR'
           (ulong *)((ulong)(regs) + REG_OFFSET(insn, pos))
                                     ^~~~~~~~~~~~~~~~~~~~~
   arch/riscv/kernel/traps_misaligned.c:129:3: note: expanded from macro 'REG_OFFSET'
           (SHIFT_RIGHT((insn), (pos) - LOG_REGBYTES) & REG_MASK)
            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/riscv/kernel/traps_misaligned.c:123:18: note: expanded from macro 'SHIFT_RIGHT'
           ((y) < 0 ? ((x) << -(y)) : ((x) >> (y)))
                           ^  ~~~~
   arch/riscv/kernel/traps_misaligned.c:323:5: warning: no previous prototype for function 'handle_misaligned_store' [-Wmissing-prototypes]
   int handle_misaligned_store(struct pt_regs *regs)
       ^
   arch/riscv/kernel/traps_misaligned.c:323:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int handle_misaligned_store(struct pt_regs *regs)
   ^
   static 
   arch/riscv/kernel/traps_misaligned.c:333:19: warning: shift count is negative [-Wshift-count-negative]
           val.data_ulong = GET_RS2(insn, regs);
                            ^~~~~~~~~~~~~~~~~~~
   arch/riscv/kernel/traps_misaligned.c:137:32: note: expanded from macro 'GET_RS2'
   #define GET_RS2(insn, regs)             (*REG_PTR(insn, SH_RS2, regs))
                                             ^~~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/riscv/kernel/traps_misaligned.c:132:28: note: expanded from macro 'REG_PTR'
           (ulong *)((ulong)(regs) + REG_OFFSET(insn, pos))
                                     ^~~~~~~~~~~~~~~~~~~~~
   arch/riscv/kernel/traps_misaligned.c:129:3: note: expanded from macro 'REG_OFFSET'
           (SHIFT_RIGHT((insn), (pos) - LOG_REGBYTES) & REG_MASK)
            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/riscv/kernel/traps_misaligned.c:123:18: note: expanded from macro 'SHIFT_RIGHT'
           ((y) < 0 ? ((x) << -(y)) : ((x) >> (y)))
                           ^  ~~~~
   arch/riscv/kernel/traps_misaligned.c:346:20: warning: shift count is negative [-Wshift-count-negative]
                   val.data_ulong = GET_RS2S(insn, regs);
                                    ^~~~~~~~~~~~~~~~~~~~
   arch/riscv/kernel/traps_misaligned.c:139:33: note: expanded from macro 'GET_RS2S'
   #define GET_RS2S(insn, regs)            (*REG_PTR(RVC_RS2S(insn), 0, regs))
                                             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/riscv/kernel/traps_misaligned.c:132:28: note: expanded from macro 'REG_PTR'
           (ulong *)((ulong)(regs) + REG_OFFSET(insn, pos))
                                     ^~~~~~~~~~~~~~~~~~~~~
   arch/riscv/kernel/traps_misaligned.c:129:3: note: expanded from macro 'REG_OFFSET'
           (SHIFT_RIGHT((insn), (pos) - LOG_REGBYTES) & REG_MASK)
            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/riscv/kernel/traps_misaligned.c:123:34: note: expanded from macro 'SHIFT_RIGHT'
           ((y) < 0 ? ((x) << -(y)) : ((x) >> (y)))
                                           ^  ~~~
   arch/riscv/kernel/traps_misaligned.c:350:20: warning: shift count is negative [-Wshift-count-negative]
                   val.data_ulong = GET_RS2C(insn, regs);
                                    ^~~~~~~~~~~~~~~~~~~~
   arch/riscv/kernel/traps_misaligned.c:140:33: note: expanded from macro 'GET_RS2C'
   #define GET_RS2C(insn, regs)            (*REG_PTR(insn, SH_RS2C, regs))
                                             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/riscv/kernel/traps_misaligned.c:132:28: note: expanded from macro 'REG_PTR'
           (ulong *)((ulong)(regs) + REG_OFFSET(insn, pos))
                                     ^~~~~~~~~~~~~~~~~~~~~
   arch/riscv/kernel/traps_misaligned.c:129:3: note: expanded from macro 'REG_OFFSET'
           (SHIFT_RIGHT((insn), (pos) - LOG_REGBYTES) & REG_MASK)
            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/riscv/kernel/traps_misaligned.c:123:34: note: expanded from macro 'SHIFT_RIGHT'
           ((y) < 0 ? ((x) << -(y)) : ((x) >> (y)))
                                           ^  ~~~
   arch/riscv/kernel/traps_misaligned.c:354:20: warning: shift count is negative [-Wshift-count-negative]
                   val.data_ulong = GET_RS2S(insn, regs);
                                    ^~~~~~~~~~~~~~~~~~~~
   arch/riscv/kernel/traps_misaligned.c:139:33: note: expanded from macro 'GET_RS2S'
   #define GET_RS2S(insn, regs)            (*REG_PTR(RVC_RS2S(insn), 0, regs))
                                             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/riscv/kernel/traps_misaligned.c:132:28: note: expanded from macro 'REG_PTR'
           (ulong *)((ulong)(regs) + REG_OFFSET(insn, pos))
                                     ^~~~~~~~~~~~~~~~~~~~~
   arch/riscv/kernel/traps_misaligned.c:129:3: note: expanded from macro 'REG_OFFSET'
           (SHIFT_RIGHT((insn), (pos) - LOG_REGBYTES) & REG_MASK)
            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/riscv/kernel/traps_misaligned.c:123:34: note: expanded from macro 'SHIFT_RIGHT'
           ((y) < 0 ? ((x) << -(y)) : ((x) >> (y)))
                                           ^  ~~~
   arch/riscv/kernel/traps_misaligned.c:358:20: warning: shift count is negative [-Wshift-count-negative]
                   val.data_ulong = GET_RS2C(insn, regs);
                                    ^~~~~~~~~~~~~~~~~~~~
   arch/riscv/kernel/traps_misaligned.c:140:33: note: expanded from macro 'GET_RS2C'
   #define GET_RS2C(insn, regs)            (*REG_PTR(insn, SH_RS2C, regs))
                                             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/riscv/kernel/traps_misaligned.c:132:28: note: expanded from macro 'REG_PTR'
           (ulong *)((ulong)(regs) + REG_OFFSET(insn, pos))
                                     ^~~~~~~~~~~~~~~~~~~~~
   arch/riscv/kernel/traps_misaligned.c:129:3: note: expanded from macro 'REG_OFFSET'
           (SHIFT_RIGHT((insn), (pos) - LOG_REGBYTES) & REG_MASK)
            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/riscv/kernel/traps_misaligned.c:123:34: note: expanded from macro 'SHIFT_RIGHT'
           ((y) < 0 ? ((x) << -(y)) : ((x) >> (y)))
                                           ^  ~~~
   15 warnings and 1 error generated.
--
   In file included from arch/riscv/include/asm/io.h:149:
   include/asm-generic/io.h:556:9: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           return inb(addr);
                  ^~~~~~~~~
   arch/riscv/include/asm/io.h:55:76: note: expanded from macro 'inb'
   #define inb(c)          ({ u8  __v; __io_pbr(); __v = readb_cpu((void*)(PCI_IOBASE + (c))); __io_par(__v); __v; })
                                                                           ~~~~~~~~~~ ^
   arch/riscv/include/asm/mmio.h:87:48: note: expanded from macro 'readb_cpu'
   #define readb_cpu(c)            ({ u8  __r = __raw_readb(c); __r; })
                                                            ^
   In file included from drivers/gpu/drm/vkms/vkms_drv.c:14:
   In file included from include/linux/dma-mapping.h:10:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/riscv/include/asm/io.h:149:
   include/asm-generic/io.h:564:9: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           return inw(addr);
                  ^~~~~~~~~
   arch/riscv/include/asm/io.h:56:76: note: expanded from macro 'inw'
   #define inw(c)          ({ u16 __v; __io_pbr(); __v = readw_cpu((void*)(PCI_IOBASE + (c))); __io_par(__v); __v; })
                                                                           ~~~~~~~~~~ ^
   arch/riscv/include/asm/mmio.h:88:76: note: expanded from macro 'readw_cpu'
   #define readw_cpu(c)            ({ u16 __r = le16_to_cpu((__force __le16)__raw_readw(c)); __r; })
                                                                                        ^
   include/uapi/linux/byteorder/little_endian.h:36:51: note: expanded from macro '__le16_to_cpu'
   #define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                     ^
   In file included from drivers/gpu/drm/vkms/vkms_drv.c:14:
   In file included from include/linux/dma-mapping.h:10:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/riscv/include/asm/io.h:149:
   include/asm-generic/io.h:572:9: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           return inl(addr);
                  ^~~~~~~~~
   arch/riscv/include/asm/io.h:57:76: note: expanded from macro 'inl'
   #define inl(c)          ({ u32 __v; __io_pbr(); __v = readl_cpu((void*)(PCI_IOBASE + (c))); __io_par(__v); __v; })
                                                                           ~~~~~~~~~~ ^
   arch/riscv/include/asm/mmio.h:89:76: note: expanded from macro 'readl_cpu'
   #define readl_cpu(c)            ({ u32 __r = le32_to_cpu((__force __le32)__raw_readl(c)); __r; })
                                                                                        ^
   include/uapi/linux/byteorder/little_endian.h:34:51: note: expanded from macro '__le32_to_cpu'
   #define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                     ^
   In file included from drivers/gpu/drm/vkms/vkms_drv.c:14:
   In file included from include/linux/dma-mapping.h:10:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/riscv/include/asm/io.h:149:
   include/asm-generic/io.h:580:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           outb(value, addr);
           ^~~~~~~~~~~~~~~~~
   arch/riscv/include/asm/io.h:59:68: note: expanded from macro 'outb'
   #define outb(v,c)       ({ __io_pbw(); writeb_cpu((v),(void*)(PCI_IOBASE + (c))); __io_paw(); })
                                                                 ~~~~~~~~~~ ^
   arch/riscv/include/asm/mmio.h:91:52: note: expanded from macro 'writeb_cpu'
   #define writeb_cpu(v, c)        ((void)__raw_writeb((v), (c)))
                                                             ^
   In file included from drivers/gpu/drm/vkms/vkms_drv.c:14:
   In file included from include/linux/dma-mapping.h:10:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/riscv/include/asm/io.h:149:
   include/asm-generic/io.h:588:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           outw(value, addr);
           ^~~~~~~~~~~~~~~~~
   arch/riscv/include/asm/io.h:60:68: note: expanded from macro 'outw'
   #define outw(v,c)       ({ __io_pbw(); writew_cpu((v),(void*)(PCI_IOBASE + (c))); __io_paw(); })
                                                                 ~~~~~~~~~~ ^
   arch/riscv/include/asm/mmio.h:92:76: note: expanded from macro 'writew_cpu'
   #define writew_cpu(v, c)        ((void)__raw_writew((__force u16)cpu_to_le16(v), (c)))
                                                                                     ^
   In file included from drivers/gpu/drm/vkms/vkms_drv.c:14:
   In file included from include/linux/dma-mapping.h:10:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/riscv/include/asm/io.h:149:
   include/asm-generic/io.h:596:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           outl(value, addr);
           ^~~~~~~~~~~~~~~~~
   arch/riscv/include/asm/io.h:61:68: note: expanded from macro 'outl'
   #define outl(v,c)       ({ __io_pbw(); writel_cpu((v),(void*)(PCI_IOBASE + (c))); __io_paw(); })
                                                                 ~~~~~~~~~~ ^
   arch/riscv/include/asm/mmio.h:93:76: note: expanded from macro 'writel_cpu'
   #define writel_cpu(v, c)        ((void)__raw_writel((__force u32)cpu_to_le32(v), (c)))
                                                                                     ^
   In file included from drivers/gpu/drm/vkms/vkms_drv.c:14:
   In file included from include/linux/dma-mapping.h:10:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/riscv/include/asm/io.h:149:
   include/asm-generic/io.h:1005:55: 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 drivers/gpu/drm/vkms/vkms_drv.c:20:
   In file included from include/drm/drm_fb_helper.h:39:
   In file included from include/linux/vgaarb.h:34:
   include/video/vga.h:215:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           outw(VGA_OUT16VAL (val, reg), port);
           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/riscv/include/asm/io.h:60:68: note: expanded from macro 'outw'
   #define outw(v,c)       ({ __io_pbw(); writew_cpu((v),(void*)(PCI_IOBASE + (c))); __io_paw(); })
                                                                 ~~~~~~~~~~ ^
   arch/riscv/include/asm/mmio.h:92:76: note: expanded from macro 'writew_cpu'
   #define writew_cpu(v, c)        ((void)__raw_writew((__force u16)cpu_to_le16(v), (c)))
                                                                                     ^
>> drivers/gpu/drm/vkms/vkms_drv.c:146:9: warning: shift count >= width of type [-Wshift-count-overflow]
                                              DMA_BIT_MASK(64));
                                              ^~~~~~~~~~~~~~~~
   include/linux/dma-mapping.h:76:54: note: expanded from macro 'DMA_BIT_MASK'
   #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
                                                        ^ ~~~
   9 warnings and 1 error generated.

vim +316 arch/riscv/kernel/traps_misaligned.c

956d705dd279f7 Damien Le Moal 2020-03-16  239  
956d705dd279f7 Damien Le Moal 2020-03-16  240  int handle_misaligned_load(struct pt_regs *regs)
956d705dd279f7 Damien Le Moal 2020-03-16  241  {
956d705dd279f7 Damien Le Moal 2020-03-16  242  	union reg_data val;
956d705dd279f7 Damien Le Moal 2020-03-16  243  	unsigned long epc = regs->epc;
956d705dd279f7 Damien Le Moal 2020-03-16  244  	unsigned long insn = get_insn(epc);
956d705dd279f7 Damien Le Moal 2020-03-16  245  	unsigned long addr = csr_read(mtval);
956d705dd279f7 Damien Le Moal 2020-03-16  246  	int i, fp = 0, shift = 0, len = 0;
956d705dd279f7 Damien Le Moal 2020-03-16  247  
956d705dd279f7 Damien Le Moal 2020-03-16  248  	regs->epc = 0;
956d705dd279f7 Damien Le Moal 2020-03-16  249  
956d705dd279f7 Damien Le Moal 2020-03-16  250  	if ((insn & INSN_MASK_LW) == INSN_MATCH_LW) {
956d705dd279f7 Damien Le Moal 2020-03-16  251  		len = 4;
956d705dd279f7 Damien Le Moal 2020-03-16  252  		shift = 8 * (sizeof(unsigned long) - len);
956d705dd279f7 Damien Le Moal 2020-03-16  253  #if defined(CONFIG_64BIT)
956d705dd279f7 Damien Le Moal 2020-03-16  254  	} else if ((insn & INSN_MASK_LD) == INSN_MATCH_LD) {
956d705dd279f7 Damien Le Moal 2020-03-16  255  		len = 8;
956d705dd279f7 Damien Le Moal 2020-03-16  256  		shift = 8 * (sizeof(unsigned long) - len);
956d705dd279f7 Damien Le Moal 2020-03-16  257  	} else if ((insn & INSN_MASK_LWU) == INSN_MATCH_LWU) {
956d705dd279f7 Damien Le Moal 2020-03-16  258  		len = 4;
956d705dd279f7 Damien Le Moal 2020-03-16  259  #endif
956d705dd279f7 Damien Le Moal 2020-03-16  260  	} else if ((insn & INSN_MASK_FLD) == INSN_MATCH_FLD) {
956d705dd279f7 Damien Le Moal 2020-03-16  261  		fp = 1;
956d705dd279f7 Damien Le Moal 2020-03-16  262  		len = 8;
956d705dd279f7 Damien Le Moal 2020-03-16  263  	} else if ((insn & INSN_MASK_FLW) == INSN_MATCH_FLW) {
956d705dd279f7 Damien Le Moal 2020-03-16  264  		fp = 1;
956d705dd279f7 Damien Le Moal 2020-03-16  265  		len = 4;
956d705dd279f7 Damien Le Moal 2020-03-16  266  	} else if ((insn & INSN_MASK_LH) == INSN_MATCH_LH) {
956d705dd279f7 Damien Le Moal 2020-03-16  267  		len = 2;
956d705dd279f7 Damien Le Moal 2020-03-16  268  		shift = 8 * (sizeof(unsigned long) - len);
956d705dd279f7 Damien Le Moal 2020-03-16  269  	} else if ((insn & INSN_MASK_LHU) == INSN_MATCH_LHU) {
956d705dd279f7 Damien Le Moal 2020-03-16  270  		len = 2;
956d705dd279f7 Damien Le Moal 2020-03-16  271  #if defined(CONFIG_64BIT)
956d705dd279f7 Damien Le Moal 2020-03-16  272  	} else if ((insn & INSN_MASK_C_LD) == INSN_MATCH_C_LD) {
956d705dd279f7 Damien Le Moal 2020-03-16  273  		len = 8;
956d705dd279f7 Damien Le Moal 2020-03-16  274  		shift = 8 * (sizeof(unsigned long) - len);
956d705dd279f7 Damien Le Moal 2020-03-16  275  		insn = RVC_RS2S(insn) << SH_RD;
956d705dd279f7 Damien Le Moal 2020-03-16  276  	} else if ((insn & INSN_MASK_C_LDSP) == INSN_MATCH_C_LDSP &&
956d705dd279f7 Damien Le Moal 2020-03-16  277  		   ((insn >> SH_RD) & 0x1f)) {
956d705dd279f7 Damien Le Moal 2020-03-16  278  		len = 8;
956d705dd279f7 Damien Le Moal 2020-03-16  279  		shift = 8 * (sizeof(unsigned long) - len);
956d705dd279f7 Damien Le Moal 2020-03-16  280  #endif
956d705dd279f7 Damien Le Moal 2020-03-16  281  	} else if ((insn & INSN_MASK_C_LW) == INSN_MATCH_C_LW) {
956d705dd279f7 Damien Le Moal 2020-03-16  282  		len = 4;
956d705dd279f7 Damien Le Moal 2020-03-16  283  		shift = 8 * (sizeof(unsigned long) - len);
956d705dd279f7 Damien Le Moal 2020-03-16  284  		insn = RVC_RS2S(insn) << SH_RD;
956d705dd279f7 Damien Le Moal 2020-03-16  285  	} else if ((insn & INSN_MASK_C_LWSP) == INSN_MATCH_C_LWSP &&
956d705dd279f7 Damien Le Moal 2020-03-16  286  		   ((insn >> SH_RD) & 0x1f)) {
956d705dd279f7 Damien Le Moal 2020-03-16  287  		len = 4;
956d705dd279f7 Damien Le Moal 2020-03-16  288  		shift = 8 * (sizeof(unsigned long) - len);
956d705dd279f7 Damien Le Moal 2020-03-16  289  	} else if ((insn & INSN_MASK_C_FLD) == INSN_MATCH_C_FLD) {
956d705dd279f7 Damien Le Moal 2020-03-16  290  		fp = 1;
956d705dd279f7 Damien Le Moal 2020-03-16  291  		len = 8;
956d705dd279f7 Damien Le Moal 2020-03-16  292  		insn = RVC_RS2S(insn) << SH_RD;
956d705dd279f7 Damien Le Moal 2020-03-16  293  	} else if ((insn & INSN_MASK_C_FLDSP) == INSN_MATCH_C_FLDSP) {
956d705dd279f7 Damien Le Moal 2020-03-16  294  		fp = 1;
956d705dd279f7 Damien Le Moal 2020-03-16  295  		len = 8;
956d705dd279f7 Damien Le Moal 2020-03-16  296  #if defined(CONFIG_32BIT)
956d705dd279f7 Damien Le Moal 2020-03-16  297  	} else if ((insn & INSN_MASK_C_FLW) == INSN_MATCH_C_FLW) {
956d705dd279f7 Damien Le Moal 2020-03-16  298  		fp = 1;
956d705dd279f7 Damien Le Moal 2020-03-16  299  		len = 4;
956d705dd279f7 Damien Le Moal 2020-03-16  300  		insn = RVC_RS2S(insn) << SH_RD;
956d705dd279f7 Damien Le Moal 2020-03-16  301  	} else if ((insn & INSN_MASK_C_FLWSP) == INSN_MATCH_C_FLWSP) {
956d705dd279f7 Damien Le Moal 2020-03-16  302  		fp = 1;
956d705dd279f7 Damien Le Moal 2020-03-16  303  		len = 4;
956d705dd279f7 Damien Le Moal 2020-03-16  304  #endif
956d705dd279f7 Damien Le Moal 2020-03-16  305  	} else {
956d705dd279f7 Damien Le Moal 2020-03-16  306  		regs->epc = epc;
956d705dd279f7 Damien Le Moal 2020-03-16  307  		return -1;
956d705dd279f7 Damien Le Moal 2020-03-16  308  	}
956d705dd279f7 Damien Le Moal 2020-03-16  309  
956d705dd279f7 Damien Le Moal 2020-03-16  310  	val.data_u64 = 0;
956d705dd279f7 Damien Le Moal 2020-03-16  311  	for (i = 0; i < len; i++)
956d705dd279f7 Damien Le Moal 2020-03-16  312  		val.data_bytes[i] = load_u8((void *)(addr + i));
956d705dd279f7 Damien Le Moal 2020-03-16  313  
956d705dd279f7 Damien Le Moal 2020-03-16  314  	if (fp)
956d705dd279f7 Damien Le Moal 2020-03-16  315  		return -1;
956d705dd279f7 Damien Le Moal 2020-03-16 @316  	SET_RD(insn, regs, val.data_ulong << shift >> shift);
956d705dd279f7 Damien Le Moal 2020-03-16  317  
956d705dd279f7 Damien Le Moal 2020-03-16  318  	regs->epc = epc + INSN_LEN(insn);
956d705dd279f7 Damien Le Moal 2020-03-16  319  
956d705dd279f7 Damien Le Moal 2020-03-16  320  	return 0;
956d705dd279f7 Damien Le Moal 2020-03-16  321  }
956d705dd279f7 Damien Le Moal 2020-03-16  322  

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

Attachment: .config.gz
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