From 7214ae7d7850719c638a018a2d38f1b78c84c44a Mon Sep 17 00:00:00 2001
From: Stuart Longland <me@vk4msl.id.au>
Date: Sun, 9 Apr 2017 10:17:09 +1000
Subject: [PATCH] synth: Make enable/mute bits volatile.

Otherwise the optimiser doesn't bother to re-check them.
---
 synth.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/synth.h b/synth.h
index f01598b..c3c37d2 100644
--- a/synth.h
+++ b/synth.h
@@ -55,14 +55,14 @@ struct poly_synth_t {
 	 * Note no bounds checking is done, if you have only defined 4
 	 * channels, then only set bits 0-3, don't set bits 4 onwards here.
 	 */
-	uintptr_t enable;
+	volatile uintptr_t enable;
 	/*!
 	 * Bit-field muting given voices.  This allows for selective adding
 	 * of voices to the overall output.  If a field is 1, then that voice
 	 * channel is not included.  (Note, disabled channels are *also*
 	 * not included.)
 	 */
-	uintptr_t mute;
+	volatile uintptr_t mute;
 };
 
 /*!