79 static char *backend;  variable
80 module_param(backend, charp, 0444);
81 MODULE_PARM_DESC(backend, "specific backend to use");
290 	/* Skip if not built-in or compression backend not selected yet. */  in allocate_buf_for_compression()
294 	/* Skip if no pstore backend yet or compression init already done. */  in allocate_buf_for_compression()
514 	/* Show which backend is going to get console writes. */  in pstore_register_console()
566 	if (backend && strcmp(backend, psi->name)) {  in pstore_register()
567 		pr_warn("ignoring unexpected backend '%s'\n", psi->name);  in pstore_register()
573 		pr_warn("backend '%s' must support at least one frontend\n",  in pstore_register()
580 		pr_warn("backend '%s' must implement read() and write()\n",  in pstore_register()
587 		pr_warn("backend '%s' already loaded: ignoring '%s'\n",  in pstore_register()
619 	 * Update the module parameter backend, so it is visible  in pstore_register()
620 	 * through /sys/module/pstore/parameters/backend  in pstore_register()
622 	backend = kstrdup(psi->name, GFP_KERNEL);  in pstore_register()
624 	pr_info("Registered %s as persistent store backend\n", psi->name);  in pstore_register()
639 	/* Only one backend can be registered at a time. */  in pstore_unregister()
659 	/* Remove all backend records from filesystem tree. */  in pstore_unregister()
665 	kfree(backend);  in pstore_unregister()
666 	backend = NULL;  in pstore_unregister()
727  * Read all the records from one persistent store backend. Create
746 	 * Backend callback read() allocates record.buf. decompress_record()  in pstore_get_backend_records()
763 		/* No more records left in backend? */  in pstore_get_backend_records()