Hi Rik, Thank you for the patch! Yet something to improve:
[auto build test ERROR on linus/master] [also build test ERROR on v4.18-rc2 next-20180629] [cannot apply to tip/x86/core] [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/Rik-van-Riel/x86-tlb-mm-make-lazy-TLB-mode-even-lazier/20180629-232822 config: s390-debug_defconfig (attached as .config) compiler: s390x-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree GCC_VERSION=7.2.0 make.cross ARCH=s390 All errors (new ones prefixed by >>): In file included from arch/s390/include/asm/fpu/internal.h:12:0, from arch/s390/include/asm/processor.h:47, from arch/s390/include/asm/thread_info.h:25, from include/linux/thread_info.h:38, from arch/s390/include/asm/preempt.h:6, from include/linux/preempt.h:81, from include/linux/spinlock.h:51, from include/linux/seqlock.h:36, from include/linux/time.h:6, from include/linux/stat.h:19, from include/linux/module.h:10, from init/main.c:16: In function 'memset', inlined from 'start_kernel' at include/linux/bitmap.h:208:3: >> include/linux/string.h:327:3: error: call to '__write_overflow' declared >> with attribute error: detected write beyond size of object passed as 1st >> parameter __write_overflow(); ^~~~~~~~~~~~~~~~~~ vim +/__write_overflow +327 include/linux/string.h 6974f0c4 Daniel Micay 2017-07-12 322 6974f0c4 Daniel Micay 2017-07-12 323 __FORTIFY_INLINE void *memset(void *p, int c, __kernel_size_t size) 6974f0c4 Daniel Micay 2017-07-12 324 { 6974f0c4 Daniel Micay 2017-07-12 325 size_t p_size = __builtin_object_size(p, 0); 6974f0c4 Daniel Micay 2017-07-12 326 if (__builtin_constant_p(size) && p_size < size) 6974f0c4 Daniel Micay 2017-07-12 @327 __write_overflow(); 6974f0c4 Daniel Micay 2017-07-12 328 if (p_size < size) 6974f0c4 Daniel Micay 2017-07-12 329 fortify_panic(__func__); 6974f0c4 Daniel Micay 2017-07-12 330 return __builtin_memset(p, c, size); 6974f0c4 Daniel Micay 2017-07-12 331 } 6974f0c4 Daniel Micay 2017-07-12 332 :::::: The code at line 327 was first introduced by commit :::::: 6974f0c4555e285ab217cee58b6e874f776ff409 include/linux/string.h: add the option of fortified string.h functions :::::: TO: Daniel Micay <[email protected]> :::::: CC: Linus Torvalds <[email protected]> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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