tree: https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git untested-uaccess head: e4c5cc79ec8eab6bc3e74d9994b33f368f137223 commit: 16bfbc92cfda8c402fb227be346da801d5517ff0 [39/79] m32r: switch to RAW_COPY_USER config: m32r-m32104ut_defconfig (attached as .config) compiler: m32r-linux-gcc (GCC) 6.2.0 reproduce: wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 16bfbc92cfda8c402fb227be346da801d5517ff0 # save the attached .config to linux build tree make.cross ARCH=m32r All errors (new ones prefixed by >>): In file included from include/linux/uaccess.h:13:0, from include/net/checksum.h:25, from include/linux/skbuff.h:31, from include/linux/icmpv6.h:4, from include/linux/ipv6.h:82, from include/net/ipv6.h:16, from net/ipv6/addrconf_core.c:7: arch/m32r/include/asm/uaccess.h: In function 'raw_copy_from_user': >> arch/m32r/include/asm/uaccess.h:469:2: error: implicit declaration of function 'prefetchw' [-Werror=implicit-function-declaration] prefetchw(to); ^~~~~~~~~ cc1: some warnings being treated as errors -- In file included from include/linux/uaccess.h:13:0, from arch/m32r/kernel/traps.c:25: arch/m32r/include/asm/uaccess.h: In function 'raw_copy_from_user': >> arch/m32r/include/asm/uaccess.h:469:2: error: implicit declaration of function 'prefetchw' [-Werror=implicit-function-declaration] prefetchw(to); ^~~~~~~~~ arch/m32r/kernel/traps.c: In function 'do_trap': arch/m32r/kernel/traps.c:255:8: error: implicit declaration of function 'fixup_exception' [-Werror=implicit-function-declaration] if (!fixup_exception(regs)) ^~~~~~~~~~~~~~~ cc1: some warnings being treated as errors -- In file included from include/linux/uaccess.h:13:0, from arch/m32r/kernel/m32r_ksyms.c:11: arch/m32r/include/asm/uaccess.h: In function 'raw_copy_from_user': >> arch/m32r/include/asm/uaccess.h:469:2: error: implicit declaration of function 'prefetchw' [-Werror=implicit-function-declaration] prefetchw(to); ^~~~~~~~~ In file included from include/linux/linkage.h:6:0, from include/linux/kernel.h:6, from include/linux/list.h:8, from include/linux/module.h:9, from arch/m32r/kernel/m32r_ksyms.c:1: arch/m32r/kernel/m32r_ksyms.c: At top level: >> arch/m32r/kernel/m32r_ksyms.c:29:15: error: '__generic_copy_from_user' undeclared here (not in a function) EXPORT_SYMBOL(__generic_copy_from_user); ^ include/linux/export.h:65:16: note: in definition of macro '___EXPORT_SYMBOL' extern typeof(sym) sym; \ ^~~ arch/m32r/kernel/m32r_ksyms.c:29:1: note: in expansion of macro 'EXPORT_SYMBOL' EXPORT_SYMBOL(__generic_copy_from_user); ^~~~~~~~~~~~~ >> arch/m32r/kernel/m32r_ksyms.c:30:15: error: '__generic_copy_to_user' undeclared here (not in a function) EXPORT_SYMBOL(__generic_copy_to_user); ^ include/linux/export.h:65:16: note: in definition of macro '___EXPORT_SYMBOL' extern typeof(sym) sym; \ ^~~ arch/m32r/kernel/m32r_ksyms.c:30:1: note: in expansion of macro 'EXPORT_SYMBOL' EXPORT_SYMBOL(__generic_copy_to_user); ^~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/prefetchw +469 arch/m32r/include/asm/uaccess.h 463 /* We let the __ versions of copy_from/to_user inline, because they're often 464 * used in fast paths and have only a small space overhead. 465 */ 466 static inline unsigned long 467 raw_copy_from_user(void *to, const void __user *from, unsigned long n) 468 { > 469 prefetchw(to); 470 __copy_user(to, from, n); 471 return n; 472 } --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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