From f4c5cf173d5effc3eeb94bb2d602f22cfdc66f66 Mon Sep 17 00:00:00 2001
From: Marian Buschsieweke <marian.buschsieweke@ovgu.de>
Date: Fri, 19 May 2023 22:09:01 +0200
Subject: [PATCH] cpu/stm32: fix compilation with clang

---
 cpu/stm32/cpu_init.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/cpu/stm32/cpu_init.c b/cpu/stm32/cpu_init.c
index 9b2a1623bc..31ee24b2d6 100644
--- a/cpu/stm32/cpu_init.c
+++ b/cpu/stm32/cpu_init.c
@@ -397,6 +397,7 @@ void backup_ram_init(void)
 #define BACKUP_RAM_MAGIC    {'R', 'I', 'O', 'T'}
 #endif
 
+__attribute__((unused))
 static inline bool _backup_battery_connected(void) {
 #if IS_USED(MODULE_PERIPH_VBAT)
     vbat_init(); /* early use of VBAT requires init() */