--- zzzz-none-000/linux-4.4.60/include/sound/pcm.h	2017-04-08 07:53:53.000000000 +0000
+++ scorpion-7490-727/linux-4.4.60/include/sound/pcm.h	2021-02-04 17:41:59.000000000 +0000
@@ -100,7 +100,7 @@
 #endif
 
 #define SNDRV_PCM_IOCTL1_RESET		0
-#define SNDRV_PCM_IOCTL1_INFO		1
+/* 1 is absent slot. */
 #define SNDRV_PCM_IOCTL1_CHANNEL_INFO	2
 #define SNDRV_PCM_IOCTL1_GSTATE		3
 #define SNDRV_PCM_IOCTL1_FIFO_SIZE	4
@@ -448,6 +448,7 @@
 	const struct snd_pcm_ops *ops;
 	/* -- runtime information -- */
 	struct snd_pcm_runtime *runtime;
+	spinlock_t runtime_lock;
         /* -- timer section -- */
 	struct snd_timer *timer;		/* timer */
 	unsigned timer_running: 1;	/* time is running */