Hi Minchan, I love your patch! Yet something to improve: [auto build test ERROR on block/for-next] [also build test ERROR on linux/master linus/master v5.12-rc1 next-20210303] [cannot apply to hnaz-linux-mm/master] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Minchan-Kim/mm-disable-LRU-pagevec-during-the-migration-temporarily/20210303-191809 base: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next config: s390-randconfig-r034-20210303 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project a7cad6680b4087eff8994f1f99ac40c661a6621f) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install s390 cross compiling tool for clang build # apt-get install binutils-s390x-linux-gnu # https://github.com/0day-ci/linux/commit/6e669beb75caae92c613a012734b1a2dc9485524 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Minchan-Kim/mm-disable-LRU-pagevec-during-the-migration-temporarily/20210303-191809 git checkout 6e669beb75caae92c613a012734b1a2dc9485524 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=s390 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x)) ^ include/uapi/linux/swab.h:119:21: note: expanded from macro '__swab32' ___constant_swab32(x) : \ ^ include/uapi/linux/swab.h:19:12: note: expanded from macro '___constant_swab32' (((__u32)(x) & (__u32)0x000000ffUL) << 24) | \ ^ In file included from arch/s390/kernel/uv.c:14: In file included from include/linux/memblock.h:14: In file included from arch/s390/include/asm/dma.h:5: In file included from arch/s390/include/asm/io.h:80: include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:34:59: note: expanded from macro '__le32_to_cpu' #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x)) ^ include/uapi/linux/swab.h:119:21: note: expanded from macro '__swab32' ___constant_swab32(x) : \ ^ include/uapi/linux/swab.h:20:12: note: expanded from macro '___constant_swab32' (((__u32)(x) & (__u32)0x0000ff00UL) << 8) | \ ^ In file included from arch/s390/kernel/uv.c:14: In file included from include/linux/memblock.h:14: In file included from arch/s390/include/asm/dma.h:5: In file included from arch/s390/include/asm/io.h:80: include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:34:59: note: expanded from macro '__le32_to_cpu' #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x)) ^ include/uapi/linux/swab.h:119:21: note: expanded from macro '__swab32' ___constant_swab32(x) : \ ^ include/uapi/linux/swab.h:21:12: note: expanded from macro '___constant_swab32' (((__u32)(x) & (__u32)0x00ff0000UL) >> 8) | \ ^ In file included from arch/s390/kernel/uv.c:14: In file included from include/linux/memblock.h:14: In file included from arch/s390/include/asm/dma.h:5: In file included from arch/s390/include/asm/io.h:80: include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:34:59: note: expanded from macro '__le32_to_cpu' #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x)) ^ include/uapi/linux/swab.h:119:21: note: expanded from macro '__swab32' ___constant_swab32(x) : \ ^ include/uapi/linux/swab.h:22:12: note: expanded from macro '___constant_swab32' (((__u32)(x) & (__u32)0xff000000UL) >> 24))) ^ In file included from arch/s390/kernel/uv.c:14: In file included from include/linux/memblock.h:14: In file included from arch/s390/include/asm/dma.h:5: In file included from arch/s390/include/asm/io.h:80: include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:34:59: note: expanded from macro '__le32_to_cpu' #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x)) ^ include/uapi/linux/swab.h:120:12: note: expanded from macro '__swab32' __fswab32(x)) ^ In file included from arch/s390/kernel/uv.c:14: In file included from include/linux/memblock.h:14: In file included from arch/s390/include/asm/dma.h:5: In file included from arch/s390/include/asm/io.h:80: include/asm-generic/io.h:501:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writeb(value, PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:511:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:521:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:609:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsb(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:617:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsw(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:625:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsl(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:634:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesb(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:643:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesw(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:652:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesl(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ >> arch/s390/kernel/uv.c:272:22: error: too few arguments to function call, single argument 'force_all_cpus' was not specified lru_add_drain_all(); ~~~~~~~~~~~~~~~~~ ^ include/linux/swap.h:347:13: note: 'lru_add_drain_all' declared here extern void lru_add_drain_all(bool force_all_cpus); ^ 20 warnings and 1 error generated. vim +/force_all_cpus +272 arch/s390/kernel/uv.c 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 212 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 213 /* 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 214 * Requests the Ultravisor to make a page accessible to a guest. 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 215 * If it's brought in the first time, it will be cleared. If 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 216 * it has been exported before, it will be decrypted and integrity 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 217 * checked. 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 218 */ 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 219 int gmap_make_secure(struct gmap *gmap, unsigned long gaddr, void *uvcb) 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 220 { 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 221 struct vm_area_struct *vma; 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 222 bool local_drain = false; 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 223 spinlock_t *ptelock; 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 224 unsigned long uaddr; 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 225 struct page *page; 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 226 pte_t *ptep; 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 227 int rc; 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 228 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 229 again: 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 230 rc = -EFAULT; d8ed45c5dcd455 Michel Lespinasse 2020-06-08 231 mmap_read_lock(gmap->mm); 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 232 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 233 uaddr = __gmap_translate(gmap, gaddr); 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 234 if (IS_ERR_VALUE(uaddr)) 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 235 goto out; 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 236 vma = find_vma(gmap->mm, uaddr); 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 237 if (!vma) 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 238 goto out; 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 239 /* 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 240 * Secure pages cannot be huge and userspace should not combine both. 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 241 * In case userspace does it anyway this will result in an -EFAULT for 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 242 * the unpack. The guest is thus never reaching secure mode. If 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 243 * userspace is playing dirty tricky with mapping huge pages later 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 244 * on this will result in a segmentation fault. 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 245 */ 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 246 if (is_vm_hugetlb_page(vma)) 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 247 goto out; 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 248 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 249 rc = -ENXIO; 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 250 page = follow_page(vma, uaddr, FOLL_WRITE); 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 251 if (IS_ERR_OR_NULL(page)) 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 252 goto out; 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 253 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 254 lock_page(page); 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 255 ptep = get_locked_pte(gmap->mm, uaddr, &ptelock); 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 256 rc = make_secure_pte(ptep, uaddr, page, uvcb); 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 257 pte_unmap_unlock(ptep, ptelock); 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 258 unlock_page(page); 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 259 out: d8ed45c5dcd455 Michel Lespinasse 2020-06-08 260 mmap_read_unlock(gmap->mm); 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 261 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 262 if (rc == -EAGAIN) { 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 263 wait_on_page_writeback(page); 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 264 } else if (rc == -EBUSY) { 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 265 /* 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 266 * If we have tried a local drain and the page refcount 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 267 * still does not match our expected safe value, try with a 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 268 * system wide drain. This is needed if the pagevecs holding 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 269 * the page are on a different CPU. 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 270 */ 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 271 if (local_drain) { 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 @272 lru_add_drain_all(); 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 273 /* We give up here, and let the caller try again */ 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 274 return -EAGAIN; 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 275 } 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 276 /* 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 277 * We are here if the page refcount does not match the 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 278 * expected safe value. The main culprits are usually 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 279 * pagevecs. With lru_add_drain() we drain the pagevecs 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 280 * on the local CPU so that hopefully the refcount will 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 281 * reach the expected safe value. 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 282 */ 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 283 lru_add_drain(); 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 284 local_drain = true; 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 285 /* And now we try again immediately after draining */ 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 286 goto again; 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 287 } else if (rc == -ENXIO) { 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 288 if (gmap_fault(gmap, gaddr, FAULT_FLAG_WRITE)) 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 289 return -EFAULT; 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 290 return -EAGAIN; 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 291 } 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 292 return rc; 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 293 } 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 294 EXPORT_SYMBOL_GPL(gmap_make_secure); 214d9bbcd3a672 Claudio Imbrenda 2020-01-21 295 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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