Hi Palmer, FYI, the error/warning still remains.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 27bba9c532a8d21050b94224ffd310ad0058c353 commit: d5be89a8d118a8e8d09cd74a921a808f17fbdd09 RISC-V: Resurrect the MMIO timer implementation for M-mode systems date: 9 weeks ago config: riscv-randconfig-r034-20201121 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project bec968cbb367dd03439c89c1d4ef968ef662d7c0) 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=d5be89a8d118a8e8d09cd74a921a808f17fbdd09 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout d5be89a8d118a8e8d09cd74a921a808f17fbdd09 # 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 <l...@intel.com> All errors (new ones prefixed by >>): In file included from drivers/clocksource/timer-riscv.c:10: In file included from include/linux/clocksource.h:21: In file included from arch/riscv/include/asm/io.h:148: 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:54:76: 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/clocksource/timer-riscv.c:10: In file included from include/linux/clocksource.h:21: In file included from arch/riscv/include/asm/io.h:148: 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:55:76: 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/clocksource/timer-riscv.c:10: In file included from include/linux/clocksource.h:21: In file included from arch/riscv/include/asm/io.h:148: 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:56:76: 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/clocksource/timer-riscv.c:10: In file included from include/linux/clocksource.h:21: In file included from arch/riscv/include/asm/io.h:148: 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:58:68: 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/clocksource/timer-riscv.c:10: In file included from include/linux/clocksource.h:21: In file included from arch/riscv/include/asm/io.h:148: 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:59:68: 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/clocksource/timer-riscv.c:10: In file included from include/linux/clocksource.h:21: In file included from arch/riscv/include/asm/io.h:148: 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:60:68: 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/clocksource/timer-riscv.c:10: In file included from include/linux/clocksource.h:21: In file included from arch/riscv/include/asm/io.h:148: include/asm-generic/io.h:1017:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port; ~~~~~~~~~~ ^ >> drivers/clocksource/timer-riscv.c:28:16: error: implicit declaration of >> function 'get_cycles64' [-Werror,-Wimplicit-function-declaration] sbi_set_timer(get_cycles64() + delta); ^ drivers/clocksource/timer-riscv.c:28:16: note: did you mean 'get_cycles'? arch/riscv/include/asm/timex.h:18:24: note: 'get_cycles' declared here static inline cycles_t get_cycles(void) ^ drivers/clocksource/timer-riscv.c:47:9: error: implicit declaration of function 'get_cycles64' [-Werror,-Wimplicit-function-declaration] return get_cycles64(); ^ drivers/clocksource/timer-riscv.c:52:9: error: implicit declaration of function 'get_cycles64' [-Werror,-Wimplicit-function-declaration] return get_cycles64(); ^ 7 warnings and 3 errors generated. vim +/get_cycles64 +28 drivers/clocksource/timer-riscv.c 62b0194368147d drivers/clocksource/riscv_timer.c Palmer Dabbelt 2018-08-04 @10 #include <linux/clocksource.h> 62b0194368147d drivers/clocksource/riscv_timer.c Palmer Dabbelt 2018-08-04 11 #include <linux/clockchips.h> 62b0194368147d drivers/clocksource/riscv_timer.c Palmer Dabbelt 2018-08-04 12 #include <linux/cpu.h> 62b0194368147d drivers/clocksource/riscv_timer.c Palmer Dabbelt 2018-08-04 13 #include <linux/delay.h> 62b0194368147d drivers/clocksource/riscv_timer.c Palmer Dabbelt 2018-08-04 14 #include <linux/irq.h> 033a65de7eced8 drivers/clocksource/timer-riscv.c Anup Patel 2020-06-01 15 #include <linux/irqdomain.h> 92e0d143fdef1f drivers/clocksource/riscv_timer.c Anup Patel 2018-12-04 16 #include <linux/sched_clock.h> 4f9bbcefa14286 drivers/clocksource/timer-riscv.c Christoph Hellwig 2019-10-28 17 #include <linux/io-64-nonatomic-lo-hi.h> 033a65de7eced8 drivers/clocksource/timer-riscv.c Anup Patel 2020-06-01 18 #include <linux/interrupt.h> 033a65de7eced8 drivers/clocksource/timer-riscv.c Anup Patel 2020-06-01 19 #include <linux/of_irq.h> f99fb607fb2bc0 drivers/clocksource/riscv_timer.c Atish Patra 2018-10-02 20 #include <asm/smp.h> 62b0194368147d drivers/clocksource/riscv_timer.c Palmer Dabbelt 2018-08-04 21 #include <asm/sbi.h> 2bc3fc877aa9c4 drivers/clocksource/timer-riscv.c Anup Patel 2020-08-17 22 #include <asm/timex.h> 4f9bbcefa14286 drivers/clocksource/timer-riscv.c Christoph Hellwig 2019-10-28 23 62b0194368147d drivers/clocksource/riscv_timer.c Palmer Dabbelt 2018-08-04 24 static int riscv_clock_next_event(unsigned long delta, 62b0194368147d drivers/clocksource/riscv_timer.c Palmer Dabbelt 2018-08-04 25 struct clock_event_device *ce) 62b0194368147d drivers/clocksource/riscv_timer.c Palmer Dabbelt 2018-08-04 26 { a4c3733d32a72f drivers/clocksource/timer-riscv.c Christoph Hellwig 2019-10-28 27 csr_set(CSR_IE, IE_TIE); 62b0194368147d drivers/clocksource/riscv_timer.c Palmer Dabbelt 2018-08-04 @28 sbi_set_timer(get_cycles64() + delta); 62b0194368147d drivers/clocksource/riscv_timer.c Palmer Dabbelt 2018-08-04 29 return 0; 62b0194368147d drivers/clocksource/riscv_timer.c Palmer Dabbelt 2018-08-04 30 } 62b0194368147d drivers/clocksource/riscv_timer.c Palmer Dabbelt 2018-08-04 31 :::::: The code at line 28 was first introduced by commit :::::: 62b0194368147def8c5a77ce604a125d620fc582 clocksource: new RISC-V SBI timer driver :::::: TO: Palmer Dabbelt <pal...@dabbelt.com> :::::: CC: Palmer Dabbelt <pal...@sifive.com> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-...@lists.01.org
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