diff --git a/arch/powerpc/platforms/pseries/nvram.c b/arch/powerpc/platforms/pseries/nvram.c
index 11a3b617ef5dbd4b7d6cbed7d045d9bc3c4c7d95..054a0ed5c7ee072726cfd3b09ecd45a4b10fe578 100644
--- a/arch/powerpc/platforms/pseries/nvram.c
+++ b/arch/powerpc/platforms/pseries/nvram.c
@@ -715,6 +715,8 @@ static int nvram_pstore_init(void)
 	nvram_pstore_info.buf = oops_data;
 	nvram_pstore_info.bufsize = oops_data_sz;
 
+	spin_lock_init(&nvram_pstore_info.buf_lock);
+
 	rc = pstore_register(&nvram_pstore_info);
 	if (rc != 0)
 		pr_err("nvram: pstore_register() failed, defaults to "