unsigned long len, unsigned long pgoff, unsigned long flags);
extern int shmem_lock(struct file *file, int lock, struct user_struct *user);
#ifdef CONFIG_SHMEM
-extern bool shmem_mapping(struct address_space *mapping);
+extern const struct address_space_operations shmem_aops;
+static inline bool shmem_mapping(struct address_space *mapping)
+{
+ return mapping->a_ops == &shmem_aops;
+}
#else
static inline bool shmem_mapping(struct address_space *mapping)
{
}
static const struct super_operations shmem_ops;
-static const struct address_space_operations shmem_aops;
+const struct address_space_operations shmem_aops;
static const struct file_operations shmem_file_operations;
static const struct inode_operations shmem_inode_operations;
static const struct inode_operations shmem_dir_inode_operations;
struct shmem_inode_info *info = SHMEM_I(inode);
struct shmem_sb_info *sbinfo = SHMEM_SB(inode->i_sb);
- if (inode->i_mapping->a_ops == &shmem_aops) {
+ if (shmem_mapping(inode->i_mapping)) {
shmem_unacct_size(info->flags, inode->i_size);
inode->i_size = 0;
shmem_truncate_range(inode, 0, (loff_t)-1);
}
/* shmem_symlink() */
- if (mapping->a_ops != &shmem_aops)
+ if (!shmem_mapping(mapping))
goto alloc_nohuge;
if (shmem_huge == SHMEM_HUGE_DENY || sgp_huge == SGP_NOHUGE)
goto alloc_nohuge;
return inode;
}
-bool shmem_mapping(struct address_space *mapping)
-{
- return mapping->a_ops == &shmem_aops;
-}
-
static int shmem_mfill_atomic_pte(struct mm_struct *dst_mm,
pmd_t *dst_pmd,
struct vm_area_struct *dst_vma,
kmem_cache_destroy(shmem_inode_cachep);
}
-static const struct address_space_operations shmem_aops = {
+const struct address_space_operations shmem_aops = {
.writepage = shmem_writepage,
.set_page_dirty = __set_page_dirty_no_writeback,
#ifdef CONFIG_TMPFS
#endif
.error_remove_page = generic_error_remove_page,
};
+EXPORT_SYMBOL(shmem_aops);
static const struct file_operations shmem_file_operations = {
.mmap = shmem_mmap,
struct page *page;
int error;
- BUG_ON(mapping->a_ops != &shmem_aops);
+ BUG_ON(!shmem_mapping(mapping));
error = shmem_getpage_gfp(inode, index, &page, SGP_CACHE,
gfp, NULL, NULL, NULL);
if (error)