linux-kernel - Re: [PATCH] mm/shmem.c: make shmem

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Date:   Sat, 14 Nov 2020 00:54:47 +0800
From:   kernel test robot <lkp@...el.com>
To:     Hui Su <sh_def@....com>, hughd@...gle.com,
        akpm@...ux-foundation.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Cc:     kbuild-all@...ts.01.org, sh_def@....com
Subject: Re: [PATCH] mm/shmem.c: make shmem_mapping() inline

Hi Hui,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on mmotm/master]

url:    https://github.com/0day-ci/linux/commits/Hui-Su/mm-shmem-c-make-shmem_mapping-inline/20201113-215549
base:   git://git.cmpxchg.org/linux-mmotm.git master
config: arm-randconfig-s032-20201113 (attached as .config)
compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.3-107-gaf3512a6-dirty
        # https://github.com/0day-ci/linux/commit/0434762d5523a3d702cd589a7f8e3771fee7b3b2
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Hui-Su/mm-shmem-c-make-shmem_mapping-inline/20201113-215549
        git checkout 0434762d5523a3d702cd589a7f8e3771fee7b3b2
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=arm 

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


"sparse warnings: (new ones prefixed by >>)"
   mm/filemap.c: note: in included file:
>> include/linux/shmem_fs.h:66:33: sparse: sparse: marked inline, but without a definition
>> include/linux/shmem_fs.h:66:33: sparse: sparse: marked inline, but without a definition
>> include/linux/shmem_fs.h:66:33: sparse: sparse: marked inline, but without a definition
--
   mm/truncate.c: note: in included file:
>> include/linux/shmem_fs.h:66:33: sparse: sparse: marked inline, but without a definition
>> include/linux/shmem_fs.h:66:33: sparse: sparse: marked inline, but without a definition
>> include/linux/shmem_fs.h:66:33: sparse: sparse: marked inline, but without a definition
--
   mm/memfd.c: note: in included file:
>> include/linux/shmem_fs.h:66:33: sparse: sparse: marked inline, but without a definition

vim +66 include/linux/shmem_fs.h

    48	
    49	/*
    50	 * Functions in mm/shmem.c called directly from elsewhere:
    51	 */
    52	extern const struct fs_parameter_description shmem_fs_parameters;
    53	extern int shmem_init(void);
    54	extern int shmem_init_fs_context(struct fs_context *fc);
    55	extern struct file *shmem_file_setup(const char *name,
    56						loff_t size, unsigned long flags);
    57	extern struct file *shmem_kernel_file_setup(const char *name, loff_t size,
    58						    unsigned long flags);
    59	extern struct file *shmem_file_setup_with_mnt(struct vfsmount *mnt,
    60			const char *name, loff_t size, unsigned long flags);
    61	extern int shmem_zero_setup(struct vm_area_struct *);
    62	extern unsigned long shmem_get_unmapped_area(struct file *, unsigned long addr,
    63			unsigned long len, unsigned long pgoff, unsigned long flags);
    64	extern int shmem_lock(struct file *file, int lock, struct user_struct *user);
    65	#ifdef CONFIG_SHMEM
  > 66	extern inline bool shmem_mapping(struct address_space *mapping);
    67	#else
    68	static inline bool shmem_mapping(struct address_space *mapping)
    69	{
    70		return false;
    71	}
    72	#endif /* CONFIG_SHMEM */
    73	extern void shmem_unlock_mapping(struct address_space *mapping);
    74	extern struct page *shmem_read_mapping_page_gfp(struct address_space *mapping,
    75						pgoff_t index, gfp_t gfp_mask);
    76	extern void shmem_truncate_range(struct inode *inode, loff_t start, loff_t end);
    77	extern int shmem_unuse(unsigned int type, bool frontswap,
    78			       unsigned long *fs_pages_to_unuse);
    79	

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

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