17 struct file *shmem_create_from_data(const char *name, void *data, size_t len)  in shmem_create_from_data()
19 	struct file *file;  in shmem_create_from_data()  local
22 	file = shmem_file_setup(name, PAGE_ALIGN(len), VM_NORESERVE);  in shmem_create_from_data()
23 	if (IS_ERR(file))  in shmem_create_from_data()
24 		return file;  in shmem_create_from_data()
26 	err = shmem_write(file, 0, data, len);  in shmem_create_from_data()
28 		fput(file);  in shmem_create_from_data()
32 	return file;  in shmem_create_from_data()
35 struct file *shmem_create_from_object(struct drm_i915_gem_object *obj)  in shmem_create_from_object()
38 	struct file *file;  in shmem_create_from_object()  local
42 		file = obj->base.filp;  in shmem_create_from_object()
43 		atomic_long_inc(&file->f_count);  in shmem_create_from_object()
44 		return file;  in shmem_create_from_object()
52 	file = shmem_create_from_data("", ptr, obj->base.size);  in shmem_create_from_object()
55 	return file;  in shmem_create_from_object()
58 void *shmem_pin_map(struct file *file)  in shmem_pin_map()  argument
64 	n_pages = file->f_mapping->host->i_size >> PAGE_SHIFT;  in shmem_pin_map()
70 		pages[i] = shmem_read_mapping_page_gfp(file->f_mapping, i,  in shmem_pin_map()
79 	mapping_set_unevictable(file->f_mapping);  in shmem_pin_map()
88 void shmem_unpin_map(struct file *file, void *ptr)  in shmem_unpin_map()  argument
90 	mapping_clear_unevictable(file->f_mapping);  in shmem_unpin_map()
94 static int __shmem_rw(struct file *file, loff_t off,  in __shmem_rw()  argument
106 		page = shmem_read_mapping_page_gfp(file->f_mapping, pfn,  in __shmem_rw()
130 int shmem_read_to_iosys_map(struct file *file, loff_t off,  in shmem_read_to_iosys_map()  argument
141 		page = shmem_read_mapping_page_gfp(file->f_mapping, pfn,  in shmem_read_to_iosys_map()
161 int shmem_read(struct file *file, loff_t off, void *dst, size_t len)  in shmem_read()  argument
163 	return __shmem_rw(file, off, dst, len, false);  in shmem_read()
166 int shmem_write(struct file *file, loff_t off, void *src, size_t len)  in shmem_write()  argument
168 	return __shmem_rw(file, off, src, len, true);  in shmem_write()