tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 84fc461db99b2dc19e019c0a97725a3653687981 commit: e05c7b1f2bc4b7b28199b9a7572f73436d97317e mm: pgtable: add shortcuts for accessing kernel PMD and PTE date: 29 hours ago config: powerpc64-randconfig-r022-20200610 (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project bc2b70982be8f5250cd0082a7190f8b417bd4dfe) 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 powerpc64 cross compiling tool for clang build # apt-get install binutils-powerpc64-linux-gnu git checkout e05c7b1f2bc4b7b28199b9a7572f73436d97317e # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>, old ones prefixed by <<): ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; ^~~~~~~~~~~~~~ <scratch space>:105:1: note: expanded from here __do_insb ^ arch/powerpc/include/asm/io.h:541:56: note: expanded from macro '__do_insb' #define __do_insb(p, b, n) readsb((PCI_IO_ADDR)_IO_BASE+(p), (b), (n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from arch/powerpc/mm/pgtable.c:24: In file included from include/linux/hardirq.h:10: In file included from arch/powerpc/include/asm/hardirq.h:6: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/powerpc/include/asm/io.h:604: arch/powerpc/include/asm/io-defs.h:45:1: error: performing pointer arithmetic on a null pointer has undefined behavior [-Werror,-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(insw, (unsigned long p, void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; ^~~~~~~~~~~~~~ <scratch space>:107:1: note: expanded from here __do_insw ^ arch/powerpc/include/asm/io.h:542:56: note: expanded from macro '__do_insw' #define __do_insw(p, b, n) readsw((PCI_IO_ADDR)_IO_BASE+(p), (b), (n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from arch/powerpc/mm/pgtable.c:24: In file included from include/linux/hardirq.h:10: In file included from arch/powerpc/include/asm/hardirq.h:6: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/powerpc/include/asm/io.h:604: arch/powerpc/include/asm/io-defs.h:47:1: error: performing pointer arithmetic on a null pointer has undefined behavior [-Werror,-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(insl, (unsigned long p, void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; ^~~~~~~~~~~~~~ <scratch space>:109:1: note: expanded from here __do_insl ^ arch/powerpc/include/asm/io.h:543:56: note: expanded from macro '__do_insl' #define __do_insl(p, b, n) readsl((PCI_IO_ADDR)_IO_BASE+(p), (b), (n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from arch/powerpc/mm/pgtable.c:24: In file included from include/linux/hardirq.h:10: In file included from arch/powerpc/include/asm/hardirq.h:6: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/powerpc/include/asm/io.h:604: arch/powerpc/include/asm/io-defs.h:49:1: error: performing pointer arithmetic on a null pointer has undefined behavior [-Werror,-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(outsb, (unsigned long p, const void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; ^~~~~~~~~~~~~~ <scratch space>:111:1: note: expanded from here __do_outsb ^ arch/powerpc/include/asm/io.h:544:58: note: expanded from macro '__do_outsb' #define __do_outsb(p, b, n) writesb((PCI_IO_ADDR)_IO_BASE+(p),(b),(n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from arch/powerpc/mm/pgtable.c:24: In file included from include/linux/hardirq.h:10: In file included from arch/powerpc/include/asm/hardirq.h:6: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/powerpc/include/asm/io.h:604: arch/powerpc/include/asm/io-defs.h:51:1: error: performing pointer arithmetic on a null pointer has undefined behavior [-Werror,-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(outsw, (unsigned long p, const void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; ^~~~~~~~~~~~~~ <scratch space>:113:1: note: expanded from here __do_outsw ^ arch/powerpc/include/asm/io.h:545:58: note: expanded from macro '__do_outsw' #define __do_outsw(p, b, n) writesw((PCI_IO_ADDR)_IO_BASE+(p),(b),(n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from arch/powerpc/mm/pgtable.c:24: In file included from include/linux/hardirq.h:10: In file included from arch/powerpc/include/asm/hardirq.h:6: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/powerpc/include/asm/io.h:604: arch/powerpc/include/asm/io-defs.h:53:1: error: performing pointer arithmetic on a null pointer has undefined behavior [-Werror,-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(outsl, (unsigned long p, const void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; ^~~~~~~~~~~~~~ <scratch space>:115:1: note: expanded from here __do_outsl ^ arch/powerpc/include/asm/io.h:546:58: note: expanded from macro '__do_outsl' #define __do_outsl(p, b, n) writesl((PCI_IO_ADDR)_IO_BASE+(p),(b),(n)) ~~~~~~~~~~~~~~~~~~~~~^ >> arch/powerpc/mm/pgtable.c:267:15: error: implicit declaration of function 'pmd_ptr' [-Werror,-Wimplicit-function-declaration] pmd_t *pmd = pmd_ptr(mm, addr); ^ >> arch/powerpc/mm/pgtable.c:267:9: error: incompatible integer to pointer conversion initializing 'pmd_t *' with an expression of type 'int' [-Werror,-Wint-conversion] pmd_t *pmd = pmd_ptr(mm, addr); ^ ~~~~~~~~~~~~~~~~~ arch/powerpc/mm/pgtable.c:341:8: error: no previous prototype for function '__find_linux_pte' [-Werror,-Wmissing-prototypes] pte_t *__find_linux_pte(pgd_t *pgdir, unsigned long ea, ^ arch/powerpc/mm/pgtable.c:341:1: note: declare 'static' if the function is not intended to be used outside of this translation unit pte_t *__find_linux_pte(pgd_t *pgdir, unsigned long ea, ^ static 9 errors generated. vim +/pmd_ptr +267 arch/powerpc/mm/pgtable.c b12c07a4bb064c Christophe Leroy 2020-05-19 263 b12c07a4bb064c Christophe Leroy 2020-05-19 264 #if defined(CONFIG_PPC_8xx) b12c07a4bb064c Christophe Leroy 2020-05-19 265 void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte) b12c07a4bb064c Christophe Leroy 2020-05-19 266 { b250c8c08c79d1 Christophe Leroy 2020-05-19 @267 pmd_t *pmd = pmd_ptr(mm, addr); b250c8c08c79d1 Christophe Leroy 2020-05-19 268 pte_basic_t val; b250c8c08c79d1 Christophe Leroy 2020-05-19 269 pte_basic_t *entry = &ptep->pte; b250c8c08c79d1 Christophe Leroy 2020-05-19 270 int num = is_hugepd(*((hugepd_t *)pmd)) ? 1 : SZ_512K / SZ_4K; b250c8c08c79d1 Christophe Leroy 2020-05-19 271 int i; b250c8c08c79d1 Christophe Leroy 2020-05-19 272 b12c07a4bb064c Christophe Leroy 2020-05-19 273 /* b12c07a4bb064c Christophe Leroy 2020-05-19 274 * Make sure hardware valid bit is not set. We don't do b12c07a4bb064c Christophe Leroy 2020-05-19 275 * tlb flush for this update. b12c07a4bb064c Christophe Leroy 2020-05-19 276 */ b12c07a4bb064c Christophe Leroy 2020-05-19 277 VM_WARN_ON(pte_hw_valid(*ptep) && !pte_protnone(*ptep)); b12c07a4bb064c Christophe Leroy 2020-05-19 278 b12c07a4bb064c Christophe Leroy 2020-05-19 279 pte = pte_mkpte(pte); b12c07a4bb064c Christophe Leroy 2020-05-19 280 b12c07a4bb064c Christophe Leroy 2020-05-19 281 pte = set_pte_filter(pte); b12c07a4bb064c Christophe Leroy 2020-05-19 282 b250c8c08c79d1 Christophe Leroy 2020-05-19 283 val = pte_val(pte); b250c8c08c79d1 Christophe Leroy 2020-05-19 284 for (i = 0; i < num; i++, entry++, val += SZ_4K) b250c8c08c79d1 Christophe Leroy 2020-05-19 285 *entry = val; b12c07a4bb064c Christophe Leroy 2020-05-19 286 } b12c07a4bb064c Christophe Leroy 2020-05-19 287 #endif f069ff396d657a Aneesh Kumar K.V 2018-05-29 288 #endif /* CONFIG_HUGETLB_PAGE */ f069ff396d657a Aneesh Kumar K.V 2018-05-29 289 :::::: The code at line 267 was first introduced by commit :::::: b250c8c08c79d1eb5354c7eaa84b7505f5f2d921 powerpc/8xx: Manage 512k huge pages as standard pages. :::::: TO: Christophe Leroy <christophe.leroy@xxxxxxxxxx> :::::: CC: Michael Ellerman <mpe@xxxxxxxxxxxxxx> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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