Merge pull request #1391 from nicholasbishop/bishop-helper-init-doc

uefi: Add panic doc to uefi::helpers::init

Author: phip1611

uefi/src/helpers/mod.rs

@@ -55,6 +55,10 @@ pub fn system_table() -> SystemTable<Boot> {
 /// **PLEASE NOTE** that these helpers are meant for the pre exit boot service
 /// epoch. Limited functionality might work after exiting them, such as logging
 /// to the debugcon device.
+///
+/// # Panics
+///
+/// This function may panic if called more than once.
 #[allow(clippy::missing_const_for_fn)]
 pub fn init() -> Result<()> {
     // Set up logging.