79 static char *backend;  variable
80 module_param(backend, charp, 0444);
81 MODULE_PARM_DESC(backend, "specific backend to use");
291 	/* Skip if not built-in or compression backend not selected yet. */  in allocate_buf_for_compression()
295 	/* Skip if no pstore backend yet or compression init already done. */  in allocate_buf_for_compression()
512 	/* Show which backend is going to get console writes. */  in pstore_register_console()
564 	if (backend && strcmp(backend, psi->name)) {  in pstore_register()
565 		pr_warn("ignoring unexpected backend '%s'\n", psi->name);  in pstore_register()
571 		pr_warn("backend '%s' must support at least one frontend\n",  in pstore_register()
578 		pr_warn("backend '%s' must implement read() and write()\n",  in pstore_register()
585 		pr_warn("backend '%s' already loaded: ignoring '%s'\n",  in pstore_register()
617 	 * Update the module parameter backend, so it is visible  in pstore_register()
618 	 * through /sys/module/pstore/parameters/backend  in pstore_register()
620 	backend = kstrdup(psi->name, GFP_KERNEL);  in pstore_register()
622 	pr_info("Registered %s as persistent store backend\n", psi->name);  in pstore_register()
637 	/* Only one backend can be registered at a time. */  in pstore_unregister()
657 	/* Remove all backend records from filesystem tree. */  in pstore_unregister()
663 	kfree(backend);  in pstore_unregister()
664 	backend = NULL;  in pstore_unregister()
725  * Read all the records from one persistent store backend. Create
744 	 * Backend callback read() allocates record.buf. decompress_record()  in pstore_get_backend_records()
761 		/* No more records left in backend? */  in pstore_get_backend_records()