linux-ext4 - Re: [PATCH] ext2: implement ->page

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Date:   Sun, 20 Dec 2020 07:32:00 +0800
From:   kernel test robot <lkp@...el.com>
To:     Chengguang Xu <cgxu519@...ernel.net>, jack@...e.com
Cc:     kbuild-all@...ts.01.org, linux-ext4@...r.kernel.org,
        Chengguang Xu <cgxu519@...ernel.net>
Subject: Re: [PATCH] ext2: implement ->page_mkwrite

Hi Chengguang,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on v5.10 next-20201218]
[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/Chengguang-Xu/ext2-implement-page_mkwrite/20201218-214646
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git a409ed156a90093a03fe6a93721ddf4c591eac87
config: x86_64-randconfig-p001-20201217 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce (this is a W=1 build):
        # https://github.com/0day-ci/linux/commit/24259119fbeffce3b221c39c3b8bc0f2d5b1e750
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Chengguang-Xu/ext2-implement-page_mkwrite/20201218-214646
        git checkout 24259119fbeffce3b221c39c3b8bc0f2d5b1e750
        # save the attached .config to linux build tree
        make W=1 ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> fs/ext2/file.c:33:12: warning: no previous prototype for 'ext2_page_mkwrite' [-Wmissing-prototypes]
      33 | vm_fault_t ext2_page_mkwrite(struct vm_fault *vmf)
         |            ^~~~~~~~~~~~~~~~~


vim +/ext2_page_mkwrite +33 fs/ext2/file.c

    32	
  > 33	vm_fault_t ext2_page_mkwrite(struct vm_fault *vmf)
    34	{
    35		struct vm_area_struct *vma = vmf->vma;
    36		struct inode *inode = file_inode(vma->vm_file);
    37		int err;
    38	
    39		if (unlikely(IS_IMMUTABLE(inode)))
    40			return VM_FAULT_SIGBUS;
    41	
    42		sb_start_pagefault(inode->i_sb);
    43		file_update_time(vma->vm_file);
    44		err = block_page_mkwrite(vma, vmf, ext2_get_block);
    45		sb_end_pagefault(inode->i_sb);
    46	
    47		return block_page_mkwrite_return(err);
    48	}
    49	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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