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SubjectRe: [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@intel.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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