26  * @backup: The struct backup pointer used to obtain the handle
29 void ttm_backup_drop(struct file *backup, pgoff_t handle)  in ttm_backup_drop()  argument
34 	shmem_truncate_range(file_inode(backup), start,  in ttm_backup_drop()
41  * @backup: The struct backup pointer used to back up the page.
49 int ttm_backup_copy_page(struct file *backup, struct page *dst,  in ttm_backup_copy_page()  argument
52 	struct address_space *mapping = backup->f_mapping;  in ttm_backup_copy_page()
67  * ttm_backup_backup_page() - Backup a page
68  * @backup: The struct backup pointer to use.
72  * @idx: A unique integer for each page and each struct backup.
73  * This allows the backup implementation to avoid managing
84  * we're not allowed to start backup IO.
94 ttm_backup_backup_page(struct file *backup, struct page *page,  in ttm_backup_backup_page()  argument
98 	struct address_space *mapping = backup->f_mapping;  in ttm_backup_backup_page()
143  * ttm_backup_fini() - Free the struct backup resources after last use.
144  * @backup: Pointer to the struct backup whose resources to free.
146  * After a call to this function, it's illegal to use the @backup pointer.
148 void ttm_backup_fini(struct file *backup)  in ttm_backup_fini()  argument
150 	fput(backup);  in ttm_backup_fini()
154  * ttm_backup_bytes_avail() - Report the approximate number of bytes of backup space
155  * left for backup.
158  * backup attempt is meaningful.
160  * Return: An approximate size of backup space available.
176  * ttm_backup_shmem_create() - Create a shmem-based struct backup.
179  * Create a backup utilizing shmem objects.
186 	return shmem_file_setup("ttm shmem backup", size, 0);  in ttm_backup_shmem_create()