72 static char *backend;  variable
73 module_param(backend, charp, 0444);
74 MODULE_PARM_DESC(backend, "specific backend to use");
371 		pr_err_once("backend (%s) writing error (%d)\n", psinfo->name,  in pstore_dump()
416 	/* Show which backend is going to get console writes. */  in pstore_register_console()
470 	if (backend && strcmp(backend, psi->name)) {  in pstore_register()
471 		pr_warn("backend '%s' already in use: ignoring '%s'\n",  in pstore_register()
472 			backend, psi->name);  in pstore_register()
478 		pr_warn("backend '%s' must support at least one frontend\n",  in pstore_register()
485 		pr_warn("backend '%s' must implement read() and write()\n",  in pstore_register()
496 		pr_warn("backend '%s' already loaded: ignoring '%s'\n",  in pstore_register()
529 	 * Update the module parameter backend, so it is visible  in pstore_register()
530 	 * through /sys/module/pstore/parameters/backend  in pstore_register()
532 	backend = new_backend;  in pstore_register()
534 	pr_info("Registered %s as persistent store backend\n", psi->name);  in pstore_register()
549 	/* Only one backend can be registered at a time. */  in pstore_unregister()
569 	/* Remove all backend records from filesystem tree. */  in pstore_unregister()
575 	kfree(backend);  in pstore_unregister()
576 	backend = NULL;  in pstore_unregister()
578 	pr_info("Unregistered %s as persistent store backend\n", psi->name);  in pstore_unregister()
652  * Read all the records from one persistent store backend. Create
678 	 * Backend callback read() allocates record.buf. decompress_record()  in pstore_get_backend_records()
695 		/* No more records left in backend? */  in pstore_get_backend_records()