linux-kernel - Re: [PATCH v2] mm: Create the new vm_fault

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Date:   Tue, 6 Nov 2018 21:27:13 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Souptick Joarder <jrdr.linux@...il.com>
Cc:     kbuild-all@...org, willy@...radead.org, akpm@...ux-foundation.org,
        mhocko@...e.com, kirill.shutemov@...ux.intel.com,
        dan.j.williams@...el.com, vbabka@...e.cz, riel@...hat.com,
        rppt@...ux.ibm.com, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] mm: Create the new vm_fault_t type

Hi Souptick,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on v4.20-rc1 next-20181106]
[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-Create-the-new-vm_fault_t-type/20181106-171908
config: i386-randconfig-h1-11061829 (attached as .config)
compiler: gcc-4.9 (Debian 4.9.4-2) 4.9.4
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All warnings (new ones prefixed by >>):

>> drivers//dma-buf/udmabuf.c:34:2: warning: initialization from incompatible pointer type
     .fault = udmabuf_vm_fault,
     ^
   drivers//dma-buf/udmabuf.c:34:2: warning: (near initialization for 'udmabuf_vm_ops.fault')

vim +34 drivers//dma-buf/udmabuf.c

fbb0de79 Gerd Hoffmann 2018-08-27  32  
fbb0de79 Gerd Hoffmann 2018-08-27  33  static const struct vm_operations_struct udmabuf_vm_ops = {
fbb0de79 Gerd Hoffmann 2018-08-27 @34  	.fault = udmabuf_vm_fault,
fbb0de79 Gerd Hoffmann 2018-08-27  35  };
fbb0de79 Gerd Hoffmann 2018-08-27  36  

:::::: The code at line 34 was first introduced by commit
:::::: fbb0de795078190a9834b3409e4b009cfb18a6d4 Add udmabuf misc device

:::::: TO: Gerd Hoffmann <kraxel@...hat.com>
:::::: CC: Gerd Hoffmann <kraxel@...hat.com>

---
0-DAY kernel test infrastructure                Open Source Technology Center
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