Hi Al, [auto build test WARNING on linus/master] [also build test WARNING on v4.12-rc1 next-20170515] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Al-Viro/move-compat-wait4-and-waitid-next-to-native-variants/20170516-084127 config: arm64-defconfig (attached as .config) compiler: aarch64-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705 reproduce: wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree make.cross ARCH=arm64 All warnings (new ones prefixed by >>): In file included from include/asm-generic/bug.h:4:0, from arch/arm64/include/asm/bug.h:66, from include/linux/bug.h:4, from include/linux/mmdebug.h:4, from include/linux/mm.h:8, from kernel/exit.c:7: kernel/exit.c: In function 'C_SYSC_waitid': kernel/exit.c:1746:38: error: 'infop' undeclared (first use in this function) unsafe_put_user(err ? 0 : SIGCHLD, &infop->si_signo, Efault); ^ include/linux/compiler.h:179:42: note: in definition of macro 'unlikely' # define unlikely(x) __builtin_expect(!!(x), 0) ^ >> arch/arm64/include/asm/uaccess.h:313:2: note: in expansion of macro >> '__put_user_err' __put_user_err((x), (ptr), __pu_err); \ ^~~~~~~~~~~~~~ include/linux/uaccess.h:302:56: note: in expansion of macro '__put_user' #define unsafe_put_user(x, ptr, err) do { if (unlikely(__put_user(x, ptr))) goto err; } while (0) ^~~~~~~~~~ kernel/exit.c:1746:2: note: in expansion of macro 'unsafe_put_user' unsafe_put_user(err ? 0 : SIGCHLD, &infop->si_signo, Efault); ^~~~~~~~~~~~~~~ kernel/exit.c:1746:38: note: each undeclared identifier is reported only once for each function it appears in unsafe_put_user(err ? 0 : SIGCHLD, &infop->si_signo, Efault); ^ include/linux/compiler.h:179:42: note: in definition of macro 'unlikely' # define unlikely(x) __builtin_expect(!!(x), 0) ^ >> arch/arm64/include/asm/uaccess.h:313:2: note: in expansion of macro >> '__put_user_err' __put_user_err((x), (ptr), __pu_err); \ ^~~~~~~~~~~~~~ include/linux/uaccess.h:302:56: note: in expansion of macro '__put_user' #define unsafe_put_user(x, ptr, err) do { if (unlikely(__put_user(x, ptr))) goto err; } while (0) ^~~~~~~~~~ kernel/exit.c:1746:2: note: in expansion of macro 'unsafe_put_user' unsafe_put_user(err ? 0 : SIGCHLD, &infop->si_signo, Efault); ^~~~~~~~~~~~~~~ vim +/__put_user_err +313 arch/arm64/include/asm/uaccess.h 57f4959b James Morse 2016-02-05 297 __put_user_asm("str", "sttr", "%w", __pu_val, (ptr), \ 57f4959b James Morse 2016-02-05 298 (err), ARM64_HAS_UAO); \ 0aea86a2 Catalin Marinas 2012-03-05 299 break; \ 0aea86a2 Catalin Marinas 2012-03-05 300 case 8: \ d135b8b5 Mark Rutland 2017-05-03 301 __put_user_asm("str", "sttr", "%x", __pu_val, (ptr), \ 57f4959b James Morse 2016-02-05 302 (err), ARM64_HAS_UAO); \ 0aea86a2 Catalin Marinas 2012-03-05 303 break; \ 0aea86a2 Catalin Marinas 2012-03-05 304 default: \ 0aea86a2 Catalin Marinas 2012-03-05 305 BUILD_BUG(); \ 0aea86a2 Catalin Marinas 2012-03-05 306 } \ bd38967d Catalin Marinas 2016-07-01 307 uaccess_disable_not_uao(); \ 0aea86a2 Catalin Marinas 2012-03-05 308 } while (0) 0aea86a2 Catalin Marinas 2012-03-05 309 0aea86a2 Catalin Marinas 2012-03-05 310 #define __put_user(x, ptr) \ 0aea86a2 Catalin Marinas 2012-03-05 311 ({ \ 0aea86a2 Catalin Marinas 2012-03-05 312 int __pu_err = 0; \ 0aea86a2 Catalin Marinas 2012-03-05 @313 __put_user_err((x), (ptr), __pu_err); \ 0aea86a2 Catalin Marinas 2012-03-05 314 __pu_err; \ 0aea86a2 Catalin Marinas 2012-03-05 315 }) 0aea86a2 Catalin Marinas 2012-03-05 316 0aea86a2 Catalin Marinas 2012-03-05 317 #define __put_user_error(x, ptr, err) \ 0aea86a2 Catalin Marinas 2012-03-05 318 ({ \ 0aea86a2 Catalin Marinas 2012-03-05 319 __put_user_err((x), (ptr), (err)); \ 0aea86a2 Catalin Marinas 2012-03-05 320 (void)0; \ 0aea86a2 Catalin Marinas 2012-03-05 321 }) :::::: The code at line 313 was first introduced by commit :::::: 0aea86a2176c22647a5b683768f858d880d5e05b arm64: User access library functions :::::: TO: Catalin Marinas <catalin.mari...@arm.com> :::::: CC: Catalin Marinas <catalin.mari...@arm.com> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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