From d486264bdf0cb754a065bad786539e26ffa33002 Mon Sep 17 00:00:00 2001
From: Mathias Gredal <matg@universal-robots.com>
Date: Tue, 16 Sep 2025 12:49:56 +0200
Subject: [PATCH] RP2040: Fix use of deprecated volatile semantics for C++20
 (#1318)

---
 portable/ThirdParty/GCC/RP2040/include/portmacro.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/portable/ThirdParty/GCC/RP2040/include/portmacro.h b/portable/ThirdParty/GCC/RP2040/include/portmacro.h
index 802470e33..3e54f384f 100644
--- a/portable/ThirdParty/GCC/RP2040/include/portmacro.h
+++ b/portable/ThirdParty/GCC/RP2040/include/portmacro.h
@@ -227,7 +227,7 @@ static inline void vPortRecursiveLock( BaseType_t xCoreID,
             if( ucOwnedByCore[ xCoreID ][ ulLockNum ] )
             {
                 configASSERT( ucRecursionCountByLock[ ulLockNum ] != 255u );
-                ucRecursionCountByLock[ ulLockNum ]++;
+                ucRecursionCountByLock[ ulLockNum ] = ucRecursionCountByLock[ ulLockNum ] + 1;
                 return;
             }
             spin_lock_unsafe_blocking(pxSpinLock);
@@ -241,7 +241,8 @@ static inline void vPortRecursiveLock( BaseType_t xCoreID,
         configASSERT( ( ucOwnedByCore[ xCoreID ] [ulLockNum ] ) != 0 );
         configASSERT( ucRecursionCountByLock[ ulLockNum ] != 0 );
 
-        if( !--ucRecursionCountByLock[ ulLockNum ] )
+        ucRecursionCountByLock[ ulLockNum ] = ucRecursionCountByLock[ ulLockNum ] - 1;
+        if ( ucRecursionCountByLock[ ulLockNum ] == 0U )
         {
             ucOwnedByCore[ xCoreID ] [ ulLockNum ] = 0;
             spin_unlock_unsafe(pxSpinLock);