tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 888c8375131656144c1605071eab2eb6ac49abc3 commit: 074b6f53c320a81e975c0b5dd79daa5e78a711ba [1811/2084] mm: fault-inject take over bootstrap kmem_cache check config: i386-randconfig-a0-01271607 (attached as .config) reproduce: git checkout 074b6f53c320a81e975c0b5dd79daa5e78a711ba # save the attached .config to linux build tree make ARCH=i386 All error/warnings (new ones prefixed by >>): In file included from mm/failslab.c:3:0: mm/slab.h: In function 'cache_from_obj': >> mm/slab.h:316:9: error: implicit declaration of function 'virt_to_head_page' [-Werror=implicit-function-declaration] page = virt_to_head_page(x); ^ >> mm/slab.h:316:7: warning: assignment makes pointer from integer without a cast [-Wint-conversion] page = virt_to_head_page(x); ^ cc1: some warnings being treated as errors vim +/virt_to_head_page +316 mm/slab.h b9ce5ef4 Glauber Costa 2012-12-18 310 * to not do even the assignment. In that case, slab_equal_or_root b9ce5ef4 Glauber Costa 2012-12-18 311 * will also be a constant. b9ce5ef4 Glauber Costa 2012-12-18 312 */ b9ce5ef4 Glauber Costa 2012-12-18 313 if (!memcg_kmem_enabled() && !unlikely(s->flags & SLAB_DEBUG_FREE)) b9ce5ef4 Glauber Costa 2012-12-18 314 return s; b9ce5ef4 Glauber Costa 2012-12-18 315 b9ce5ef4 Glauber Costa 2012-12-18 @316 page = virt_to_head_page(x); b9ce5ef4 Glauber Costa 2012-12-18 317 cachep = page->slab_cache; b9ce5ef4 Glauber Costa 2012-12-18 318 if (slab_equal_or_root(cachep, s)) b9ce5ef4 Glauber Costa 2012-12-18 319 return cachep; :::::: The code at line 316 was first introduced by commit :::::: b9ce5ef49f00daf2254c6953c8d31f79aabccd34 sl[au]b: always get the cache from its page in kmem_cache_free() :::::: TO: Glauber Costa <glommer@xxxxxxxxxxxxx> :::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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