72 static char *backend;  variable
73 module_param(backend, charp, 0444);
74 MODULE_PARM_DESC(backend, "specific backend to use");
370 		pr_err_once("backend (%s) writing error (%d)\n", psinfo->name,  in pstore_dump()
415 	/* Show which backend is going to get console writes. */  in pstore_register_console()
467 	if (backend && strcmp(backend, psi->name)) {  in pstore_register()
468 		pr_warn("backend '%s' already in use: ignoring '%s'\n",  in pstore_register()
469 			backend, psi->name);  in pstore_register()
475 		pr_warn("backend '%s' must support at least one frontend\n",  in pstore_register()
482 		pr_warn("backend '%s' must implement read() and write()\n",  in pstore_register()
489 		pr_warn("backend '%s' already loaded: ignoring '%s'\n",  in pstore_register()
521 	 * Update the module parameter backend, so it is visible  in pstore_register()
522 	 * through /sys/module/pstore/parameters/backend  in pstore_register()
524 	backend = kstrdup(psi->name, GFP_KERNEL);  in pstore_register()
526 	pr_info("Registered %s as persistent store backend\n", psi->name);  in pstore_register()
541 	/* Only one backend can be registered at a time. */  in pstore_unregister()
561 	/* Remove all backend records from filesystem tree. */  in pstore_unregister()
567 	kfree(backend);  in pstore_unregister()
568 	backend = NULL;  in pstore_unregister()
570 	pr_info("Unregistered %s as persistent store backend\n", psi->name);  in pstore_unregister()
644  * Read all the records from one persistent store backend. Create
670 	 * Backend callback read() allocates record.buf. decompress_record()  in pstore_get_backend_records()
687 		/* No more records left in backend? */  in pstore_get_backend_records()