Hi Kirill, [auto build test WARNING on mmotm/master] [also build test WARNING on v4.9 next-20161219] [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/Kirill-A-Shutemov/mm-drop-zap_details-ignore_dirty/20161220-092938 base: git://git.cmpxchg.org/linux-mmotm.git master config: x86_64-randconfig-x004-201651 (attached as .config) compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901 reproduce: # save the attached .config to linux build tree make ARCH=x86_64 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 include/linux/mman.h:4, from mm/madvise.c:8: mm/madvise.c: In function 'madvise_dontneed': mm/madvise.c:476:7: error: implicit declaration of function 'can_madv_dontneed_vma' [-Werror=implicit-function-declaration] if (!can_madv_dontneed_vma(vma)) ^ include/linux/compiler.h:149:30: note: in definition of macro '__trace_if' if (__builtin_constant_p(!!(cond)) ? !!(cond) : \ ^~~~ >> mm/madvise.c:476:2: note: in expansion of macro 'if' if (!can_madv_dontneed_vma(vma)) ^~ cc1: some warnings being treated as errors vim +/if +476 mm/madvise.c 460 * 461 * NB: This interface discards data rather than pushes it out to swap, 462 * as some implementations do. This has performance implications for 463 * applications like large transactional databases which want to discard 464 * pages in anonymous maps after committing to backing store the data 465 * that was kept in them. There is no reason to write this data out to 466 * the swap area if the application is discarding it. 467 * 468 * An interface that causes the system to free clean pages and flush 469 * dirty pages is already available as msync(MS_INVALIDATE). 470 */ 471 static long madvise_dontneed(struct vm_area_struct *vma, 472 struct vm_area_struct **prev, 473 unsigned long start, unsigned long end) 474 { 475 *prev = vma; > 476 if (!can_madv_dontneed_vma(vma)) 477 return -EINVAL; 478 479 zap_page_range(vma, start, end - start); 480 return 0; 481 } 482 483 /* 484 * Application wants to free up the pages and associated backing store. --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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