Hi Michal, [auto build test WARNING on next-20160229] [also build test WARNING on v4.5-rc6] [cannot apply to drm/drm-next drm-intel/for-linux-next v4.5-rc6 v4.5-rc5 v4.5-rc4] [if your patch is applied to the wrong git tree, please drop us a note to help improving the system]
url: https://github.com/0day-ci/linux/commits/Michal-Hocko/change-mmap_sem-taken-for-write-killable/20160229-213258 config: i386-randconfig-x003-201609 (attached as .config) reproduce: # save the attached .config to linux build tree make ARCH=i386 All warnings (new ones prefixed by >>): In file included from include/asm-generic/bug.h:4:0, from arch/x86/include/asm/bug.h:35, from include/linux/bug.h:4, from include/linux/mmdebug.h:4, from include/linux/mm.h:8, from mm/util.c:1: mm/util.c: In function 'vm_mmap_pgoff': mm/util.c:331:8: error: implicit declaration of function 'down_write_killable' [-Werror=implicit-function-declaration] if (down_write_killable(&mm->mmap_sem)) ^ include/linux/compiler.h:151:30: note: in definition of macro '__trace_if' if (__builtin_constant_p(!!(cond)) ? !!(cond) : \ ^ >> mm/util.c:331:4: note: in expansion of macro 'if' if (down_write_killable(&mm->mmap_sem)) ^ cc1: some warnings being treated as errors -- In file included from include/uapi/linux/stddef.h:1:0, from include/linux/stddef.h:4, from include/uapi/linux/posix_types.h:4, from include/uapi/linux/types.h:13, from include/linux/types.h:5, from include/uapi/linux/capability.h:16, from include/linux/capability.h:15, from mm/mlock.c:8: mm/mlock.c: In function 'do_mlock': mm/mlock.c:638:6: error: implicit declaration of function 'down_write_killable' [-Werror=implicit-function-declaration] if (down_write_killable(¤t->mm->mmap_sem)) ^ include/linux/compiler.h:151:30: note: in definition of macro '__trace_if' if (__builtin_constant_p(!!(cond)) ? !!(cond) : \ ^ >> mm/mlock.c:638:2: note: in expansion of macro 'if' if (down_write_killable(¤t->mm->mmap_sem)) ^ cc1: some warnings being treated as errors -- In file included from include/linux/linkage.h:4:0, from include/linux/kernel.h:6, from mm/mmap.c:11: mm/mmap.c: In function 'SYSC_brk': mm/mmap.c:185:6: error: implicit declaration of function 'down_write_killable' [-Werror=implicit-function-declaration] if (down_write_killable(&mm->mmap_sem)) ^ include/linux/compiler.h:151:30: note: in definition of macro '__trace_if' if (__builtin_constant_p(!!(cond)) ? !!(cond) : \ ^ >> mm/mmap.c:185:2: note: in expansion of macro 'if' if (down_write_killable(&mm->mmap_sem)) ^ cc1: some warnings being treated as errors -- In file included from include/asm-generic/bug.h:4:0, from arch/x86/include/asm/bug.h:35, from include/linux/bug.h:4, from include/linux/mmdebug.h:4, from include/linux/mm.h:8, from mm/mprotect.c:11: mm/mprotect.c: In function 'SYSC_mprotect': mm/mprotect.c:381:6: error: implicit declaration of function 'down_write_killable' [-Werror=implicit-function-declaration] if (down_write_killable(¤t->mm->mmap_sem)) ^ include/linux/compiler.h:151:30: note: in definition of macro '__trace_if' if (__builtin_constant_p(!!(cond)) ? !!(cond) : \ ^ >> mm/mprotect.c:381:2: note: in expansion of macro 'if' if (down_write_killable(¤t->mm->mmap_sem)) ^ cc1: some warnings being treated as errors -- In file included from include/asm-generic/bug.h:4:0, from arch/x86/include/asm/bug.h:35, from include/linux/bug.h:4, from include/linux/mmdebug.h:4, from include/linux/mm.h:8, from mm/mremap.c:10: mm/mremap.c: In function 'SYSC_mremap': mm/mremap.c:505:6: error: implicit declaration of function 'down_write_killable' [-Werror=implicit-function-declaration] if (down_write_killable(¤t->mm->mmap_sem)) ^ include/linux/compiler.h:151:30: note: in definition of macro '__trace_if' if (__builtin_constant_p(!!(cond)) ? !!(cond) : \ ^ >> mm/mremap.c:505:2: note: in expansion of macro 'if' if (down_write_killable(¤t->mm->mmap_sem)) ^ cc1: some warnings being treated as errors -- In file included from include/asm-generic/bug.h:4:0, from arch/x86/include/asm/bug.h:35, from include/linux/bug.h:4, from include/linux/mmdebug.h:4, from include/linux/mm.h:8, from include/linux/mman.h:4, from mm/madvise.c:8: mm/madvise.c: In function 'SYSC_madvise': mm/madvise.c:768:7: error: implicit declaration of function 'down_write_killable' [-Werror=implicit-function-declaration] if (down_write_killable(¤t->mm->mmap_sem)) ^ include/linux/compiler.h:151:30: note: in definition of macro '__trace_if' if (__builtin_constant_p(!!(cond)) ? !!(cond) : \ ^ >> mm/madvise.c:768:3: note: in expansion of macro 'if' if (down_write_killable(¤t->mm->mmap_sem)) ^ cc1: some warnings being treated as errors vim +/if +331 mm/util.c 315 { 316 return get_user_pages_unlocked(start, nr_pages, write, 0, pages); 317 } 318 EXPORT_SYMBOL_GPL(get_user_pages_fast); 319 320 unsigned long vm_mmap_pgoff(struct file *file, unsigned long addr, 321 unsigned long len, unsigned long prot, 322 unsigned long flag, unsigned long pgoff, bool killable) 323 { 324 unsigned long ret; 325 struct mm_struct *mm = current->mm; 326 unsigned long populate; 327 328 ret = security_mmap_file(file, prot, flag); 329 if (!ret) { 330 if (killable) { > 331 if (down_write_killable(&mm->mmap_sem)) 332 return -EINTR; 333 } else { 334 down_write(&mm->mmap_sem); 335 } 336 ret = do_mmap_pgoff(file, addr, len, prot, flag, pgoff, 337 &populate); 338 up_write(&mm->mmap_sem); 339 if (populate) --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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