Added ChibiOS specific patches.

src/api/sockets.c

@@ -2668,10 +2668,15 @@ static void select_check_waiters(int s, int has_recvevent, int has_sendevent, in
 #endif /* LWIP_SOCKET_SELECT */
       if (do_signal) {
         scb->sem_signalled = 1;
-        /* For !LWIP_TCPIP_CORE_LOCKING, we don't call SYS_ARCH_UNPROTECT() before signaling
-           the semaphore, as this might lead to the select thread taking itself off the list,
-           invalidating the semaphore. */
-        sys_sem_signal(SELECT_SEM_PTR(scb->sem));
+        /* Don't call SYS_ARCH_UNPROTECT() before signaling the semaphore, as this might
+           lead to the select thread taking itself off the list, invalidating the semaphore. */
+        /* CHIBIOS FIX: specific variant of this call to be called from within
+           a lock.*/
+#if !SYS_LIGHTWEIGHT_PROT
+        sys_sem_signal(&scb->sem);
+#else
+        sys_sem_signal_S(&scb->sem);
+#endif
       }
     }
 #if LWIP_TCPIP_CORE_LOCKING

src/include/lwip/sys.h

@@ -199,6 +199,10 @@ err_t sys_sem_new(sys_sem_t *sem, u8_t count);
  * @param sem the semaphore to signal
  */
 void sys_sem_signal(sys_sem_t *sem);
+
+/* CHIBIOS FIX: specific variant of this call to be called from within a lock.*/
+void sys_sem_signal_S(sys_sem_t *sem);
+
 /**
  * @ingroup sys_sem
  *  Blocks the thread while waiting for the semaphore to be signaled. If the