From deea28598149ac786d833c710e3ca8c76d431bbb Mon Sep 17 00:00:00 2001
From: Jakob <jakob.laurell@wattstep.com>
Date: Sat, 10 Oct 2026 14:46:44 +0200
Subject: [PATCH] Gate the _check-cache verification with #[cfg] instead of
 cfg!()

The cfg!() check is a runtime-false condition, so the await inside it
still adds a suspend state to get_page_state_cached's state machine,
which the optimizer cannot remove. The verification code was compiled
into every build. Measured -272 bytes of .text on a thumbv7em firmware.
---
 src/lib.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/lib.rs b/src/lib.rs
index 37fb23a..7584519 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -172,7 +172,8 @@ impl<S: NorFlash, C: CacheImpl<KEY>, KEY> GenericStorage<S, C, KEY> {
         page_index: usize,
     ) -> Result<PageState, Error<S::Error>> {
         if let Some(cached_page_state) = self.cache.get_page_state(page_index) {
-            if cfg!(feature = "_check-cache") {
+            #[cfg(feature = "_check-cache")]
+            {
                 let discovered_state = self.get_page_state(page_index).await?;
                 assert_eq!(
                     cached_page_state, discovered_state,