14 struct file *shmem_create_from_data(const char *name, void *data, size_t len)  in shmem_create_from_data()
16 	struct file *file;  in shmem_create_from_data()  local
19 	file = shmem_file_setup(name, PAGE_ALIGN(len), VM_NORESERVE);  in shmem_create_from_data()
20 	if (IS_ERR(file))  in shmem_create_from_data()
21 		return file;  in shmem_create_from_data()
23 	err = shmem_write(file, 0, data, len);  in shmem_create_from_data()
25 		fput(file);  in shmem_create_from_data()
29 	return file;  in shmem_create_from_data()
32 struct file *shmem_create_from_object(struct drm_i915_gem_object *obj)  in shmem_create_from_object()
34 	struct file *file;  in shmem_create_from_object()  local
38 		file = obj->base.filp;  in shmem_create_from_object()
39 		atomic_long_inc(&file->f_count);  in shmem_create_from_object()
40 		return file;  in shmem_create_from_object()
48 	file = shmem_create_from_data("", ptr, obj->base.size);  in shmem_create_from_object()
51 	return file;  in shmem_create_from_object()
54 void *shmem_pin_map(struct file *file)  in shmem_pin_map()  argument
60 	n_pages = file->f_mapping->host->i_size >> PAGE_SHIFT;  in shmem_pin_map()
66 		pages[i] = shmem_read_mapping_page_gfp(file->f_mapping, i,  in shmem_pin_map()
75 	mapping_set_unevictable(file->f_mapping);  in shmem_pin_map()
84 void shmem_unpin_map(struct file *file, void *ptr)  in shmem_unpin_map()  argument
86 	mapping_clear_unevictable(file->f_mapping);  in shmem_unpin_map()
90 static int __shmem_rw(struct file *file, loff_t off,  in __shmem_rw()  argument
102 		page = shmem_read_mapping_page_gfp(file->f_mapping, pfn,  in __shmem_rw()
126 int shmem_read(struct file *file, loff_t off, void *dst, size_t len)  in shmem_read()  argument
128 	return __shmem_rw(file, off, dst, len, false);  in shmem_read()
131 int shmem_write(struct file *file, loff_t off, void *src, size_t len)  in shmem_write()  argument
133 	return __shmem_rw(file, off, src, len, true);  in shmem_write()