Fix metadata buffer wait/wakeup

[lttng-modules.git] / lib / ringbuffer / frontend_types.h

diff --git a/lib/ringbuffer/frontend_types.h b/lib/ringbuffer/frontend_types.h
index fe208b676e0f035f8bd4b9794ca94f79f24ca8dd..5c7437f8127b903ca5acade4623d0bf3af689ea7 100644 (file)
--- a/lib/ringbuffer/frontend_types.h
+++ b/lib/ringbuffer/frontend_types.h
@@ -19,6 +19,7 @@
 #include <linux/kref.h>
 #include "../../wrapper/ringbuffer/config.h"
 #include "../../wrapper/ringbuffer/backend_types.h"
+#include "../../wrapper/spinlock.h"
 #include "../../lib/prio_heap/lttng_prio_heap.h"       /* For per-CPU read-side iterator */
 
 /*
@@ -128,6 +129,7 @@ struct lib_ring_buffer {
        union v_atomic records_count;   /* Number of records written */
        union v_atomic records_overrun; /* Number of overwritten records */
        wait_queue_head_t read_wait;    /* reader buffer-level wait queue */
+       wait_queue_head_t write_wait;   /* writer buffer-level wait queue (for metadata only) */
        int finalized;                  /* buffer has been finalized */
        struct timer_list switch_timer; /* timer for periodical switch */
        struct timer_list read_timer;   /* timer for read poll */