Re: [PATCH] mm: convert return type of handle_mm_fault() caller to vm_fault_t

From: kbuild test robot
Date: Sat Jun 16 2018 - 14:14:59 EST

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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>

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Next message: Jonathan Cameron: "Re: [PATCH v2 2/2] iio: adc: Add Spreadtrum SC27XX PMICs ADC support"
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