Hi Souptick, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on v4.17] [cannot apply to linus/master powerpc/next sparc-next/master next-20180615] [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/Souptick-Joarder/mm-convert-return-type-of-handle_mm_fault-caller-to-vm_fault_t/20180615-030636 config: powerpc-allyesconfig (attached as .config) compiler: powerpc64-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=powerpc All warnings (new ones prefixed by >>): arch/powerpc/mm/copro_fault.c:36:5: error: conflicting types for 'copro_handle_mm_fault' int copro_handle_mm_fault(struct mm_struct *mm, unsigned long ea, ^~~~~~~~~~~~~~~~~~~~~ In file included from arch/powerpc/mm/copro_fault.c:27:0: arch/powerpc/include/asm/copro.h:18:5: note: previous declaration of 'copro_handle_mm_fault' was here int copro_handle_mm_fault(struct mm_struct *mm, unsigned long ea, ^~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/linkage.h:7:0, from include/linux/kernel.h:7, from include/asm-generic/bug.h:18, from arch/powerpc/include/asm/bug.h:128, from include/linux/bug.h:5, from arch/powerpc/include/asm/mmu.h:126, from arch/powerpc/include/asm/lppaca.h:36, from arch/powerpc/include/asm/paca.h:21, from arch/powerpc/include/asm/current.h:16, from include/linux/sched.h:12, from arch/powerpc/mm/copro_fault.c:23: arch/powerpc/mm/copro_fault.c:101:19: error: conflicting types for 'copro_handle_mm_fault' EXPORT_SYMBOL_GPL(copro_handle_mm_fault); ^ include/linux/export.h:65:21: note: in definition of macro '___EXPORT_SYMBOL' extern typeof(sym) sym; \ ^~~ >> arch/powerpc/mm/copro_fault.c:101:1: note: in expansion of macro 'EXPORT_SYMBOL_GPL' EXPORT_SYMBOL_GPL(copro_handle_mm_fault); ^~~~~~~~~~~~~~~~~ In file included from arch/powerpc/mm/copro_fault.c:27:0: arch/powerpc/include/asm/copro.h:18:5: note: previous declaration of 'copro_handle_mm_fault' was here int copro_handle_mm_fault(struct mm_struct *mm, unsigned long ea, ^~~~~~~~~~~~~~~~~~~~~ vim +/EXPORT_SYMBOL_GPL +101 arch/powerpc/mm/copro_fault.c 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 @23 #include <linux/sched.h> 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 24 #include <linux/mm.h> 4b16f8e2d arch/powerpc/platforms/cell/spu_fault.c Paul Gortmaker 2011-07-22 25 #include <linux/export.h> e83d01697 arch/powerpc/mm/copro_fault.c Ian Munsie 2014-10-08 26 #include <asm/reg.h> 73d16a6e0 arch/powerpc/mm/copro_fault.c Ian Munsie 2014-10-08 27 #include <asm/copro.h> be3ebfe82 arch/powerpc/mm/copro_fault.c Ian Munsie 2014-10-08 28 #include <asm/spu.h> ec249dd86 arch/powerpc/mm/copro_fault.c Michael Neuling 2015-05-27 29 #include <misc/cxl-base.h> 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 30 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 31 /* 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 32 * This ought to be kept in sync with the powerpc specific do_page_fault 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 33 * function. Currently, there are a few corner cases that we haven't had 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 34 * to handle fortunately. 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 35 */ e83d01697 arch/powerpc/mm/copro_fault.c Ian Munsie 2014-10-08 36 int copro_handle_mm_fault(struct mm_struct *mm, unsigned long ea, 7c71e54a4 arch/powerpc/mm/copro_fault.c Souptick Joarder 2018-06-15 37 unsigned long dsisr, vm_fault_t *flt) 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 38 { 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 39 struct vm_area_struct *vma; 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 40 unsigned long is_write; 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 41 int ret; 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 42 60ee03194 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2009-02-17 43 if (mm == NULL) 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 44 return -EFAULT; 60ee03194 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2009-02-17 45 60ee03194 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2009-02-17 46 if (mm->pgd == NULL) 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 47 return -EFAULT; 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 48 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 49 down_read(&mm->mmap_sem); 60ee03194 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2009-02-17 50 ret = -EFAULT; 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 51 vma = find_vma(mm, ea); 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 52 if (!vma) 60ee03194 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2009-02-17 53 goto out_unlock; 60ee03194 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2009-02-17 54 60ee03194 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2009-02-17 55 if (ea < vma->vm_start) { 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 56 if (!(vma->vm_flags & VM_GROWSDOWN)) 60ee03194 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2009-02-17 57 goto out_unlock; 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 58 if (expand_stack(vma, ea)) 60ee03194 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2009-02-17 59 goto out_unlock; 60ee03194 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2009-02-17 60 } 60ee03194 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2009-02-17 61 e83d01697 arch/powerpc/mm/copro_fault.c Ian Munsie 2014-10-08 62 is_write = dsisr & DSISR_ISSTORE; 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 63 if (is_write) { 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 64 if (!(vma->vm_flags & VM_WRITE)) 60ee03194 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2009-02-17 65 goto out_unlock; 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 66 } else { 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 67 if (!(vma->vm_flags & (VM_READ | VM_EXEC))) 60ee03194 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2009-02-17 68 goto out_unlock; 842915f56 arch/powerpc/mm/copro_fault.c Mel Gorman 2015-02-12 69 /* 18061c17c arch/powerpc/mm/copro_fault.c Aneesh Kumar K.V 2017-01-30 70 * PROT_NONE is covered by the VMA check above. 18061c17c arch/powerpc/mm/copro_fault.c Aneesh Kumar K.V 2017-01-30 71 * and hash should get a NOHPTE fault instead of 18061c17c arch/powerpc/mm/copro_fault.c Aneesh Kumar K.V 2017-01-30 72 * a PROTFAULT in case fixup is needed for things 18061c17c arch/powerpc/mm/copro_fault.c Aneesh Kumar K.V 2017-01-30 73 * like autonuma. 842915f56 arch/powerpc/mm/copro_fault.c Mel Gorman 2015-02-12 74 */ 18061c17c arch/powerpc/mm/copro_fault.c Aneesh Kumar K.V 2017-01-30 75 if (!radix_enabled()) 842915f56 arch/powerpc/mm/copro_fault.c Mel Gorman 2015-02-12 76 WARN_ON_ONCE(dsisr & DSISR_PROTFAULT); 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 77 } 60ee03194 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2009-02-17 78 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 79 ret = 0; dcddffd41 arch/powerpc/mm/copro_fault.c Kirill A. Shutemov 2016-07-26 80 *flt = handle_mm_fault(vma, ea, is_write ? FAULT_FLAG_WRITE : 0); 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 81 if (unlikely(*flt & VM_FAULT_ERROR)) { 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 82 if (*flt & VM_FAULT_OOM) { 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 83 ret = -ENOMEM; 60ee03194 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2009-02-17 84 goto out_unlock; 33692f275 arch/powerpc/mm/copro_fault.c Linus Torvalds 2015-01-29 85 } else if (*flt & (VM_FAULT_SIGBUS | VM_FAULT_SIGSEGV)) { 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 86 ret = -EFAULT; 60ee03194 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2009-02-17 87 goto out_unlock; 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 88 } 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 89 BUG(); 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 90 } 60ee03194 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2009-02-17 91 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 92 if (*flt & VM_FAULT_MAJOR) 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 93 current->maj_flt++; 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 94 else 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 95 current->min_flt++; 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 96 60ee03194 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2009-02-17 97 out_unlock: 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 98 up_read(&mm->mmap_sem); 60ee03194 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2009-02-17 99 return ret; 7cd58e438 arch/powerpc/platforms/cell/spu_fault.c Jeremy Kerr 2007-12-20 100 } e83d01697 arch/powerpc/mm/copro_fault.c Ian Munsie 2014-10-08 @101 EXPORT_SYMBOL_GPL(copro_handle_mm_fault); 73d16a6e0 arch/powerpc/mm/copro_fault.c Ian Munsie 2014-10-08 102 :::::: The code at line 101 was first introduced by commit :::::: e83d01697583d8610d1d62279758c2a881e3396f powerpc/cell: Move spu_handle_mm_fault() out of cell platform :::::: TO: Ian Munsie <imunsie@xxxxxxxxxxx> :::::: CC: Michael Ellerman <mpe@xxxxxxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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