Namespace kernel version macros

[lttng-modules.git] / lib / ringbuffer / ring_buffer_frontend.c

diff --git a/lib/ringbuffer/ring_buffer_frontend.c b/lib/ringbuffer/ring_buffer_frontend.c
index 0d2d6936bbcf870bce1d093a762c9a733b8cbc8a..9121088f3ac7be9e5d84367675dd456ea656b7db 100644 (file)
--- a/lib/ringbuffer/ring_buffer_frontend.c
+++ b/lib/ringbuffer/ring_buffer_frontend.c
@@ -453,7 +453,7 @@ static void lib_ring_buffer_stop_read_timer(struct lib_ring_buffer *buf)
        buf->read_timer_enabled = 0;
 }
 
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0))
+#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0))
 
 enum cpuhp_state lttng_rb_hp_prepare;
 enum cpuhp_state lttng_rb_hp_online;
@@ -524,7 +524,7 @@ int lttng_cpuhp_rb_frontend_offline(unsigned int cpu,
 }
 EXPORT_SYMBOL_GPL(lttng_cpuhp_rb_frontend_offline);
 
-#else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0)) */
+#else /* #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0)) */
 
 #ifdef CONFIG_HOTPLUG_CPU
 
@@ -586,7 +586,7 @@ int lib_ring_buffer_cpu_hp_callback(struct notifier_block *nb,
 
 #endif
 
-#endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0)) */
+#endif /* #else #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0)) */
 
 #if defined(CONFIG_NO_HZ) && defined(CONFIG_LIB_RING_BUFFER)
 /*
@@ -692,7 +692,7 @@ static void channel_unregister_notifiers(struct channel *chan)
                 * concurrency.
                 */
 #endif /* CONFIG_NO_HZ */
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0))
+#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0))
                {
                        int ret;
 
@@ -703,7 +703,7 @@ static void channel_unregister_notifiers(struct channel *chan)
                                &chan->cpuhp_prepare.node);
                        WARN_ON(ret);
                }
-#else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0)) */
+#else /* #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0)) */
                {
                        int cpu;
 
@@ -727,7 +727,7 @@ static void channel_unregister_notifiers(struct channel *chan)
                        }
 #endif
                }
-#endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0)) */
+#endif /* #else #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0)) */
        } else {
                struct lib_ring_buffer *buf = chan->backend.buf;
 
@@ -856,7 +856,7 @@ struct channel *channel_create(const struct lib_ring_buffer_config *config,
        init_waitqueue_head(&chan->hp_wait);
 
        if (config->alloc == RING_BUFFER_ALLOC_PER_CPU) {
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0))
+#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0))
                chan->cpuhp_prepare.component = LTTNG_RING_BUFFER_FRONTEND;
                ret = cpuhp_state_add_instance_nocalls(lttng_rb_hp_prepare,
                        &chan->cpuhp_prepare.node);
@@ -868,7 +868,7 @@ struct channel *channel_create(const struct lib_ring_buffer_config *config,
                        &chan->cpuhp_online.node);
                if (ret)
                        goto cpuhp_online_error;
-#else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0)) */
+#else /* #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0)) */
                {
                        int cpu;
                        /*
@@ -904,7 +904,7 @@ struct channel *channel_create(const struct lib_ring_buffer_config *config,
                        }
 #endif
                }
-#endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0)) */
+#endif /* #else #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0)) */
 
 #if defined(CONFIG_NO_HZ) && defined(CONFIG_LIB_RING_BUFFER)
                /* Only benefit from NO_HZ idle with per-cpu buffers for now. */
@@ -924,13 +924,13 @@ struct channel *channel_create(const struct lib_ring_buffer_config *config,
 
        return chan;
 
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0))
+#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0))
 cpuhp_online_error:
        ret = cpuhp_state_remove_instance_nocalls(lttng_rb_hp_prepare,
                        &chan->cpuhp_prepare.node);
        WARN_ON(ret);
 cpuhp_prepare_error:
-#endif /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0)) */
+#endif /* #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0)) */
 error_free_backend:
        channel_backend_free(&chan->backend);
 error:
@@ -1074,7 +1074,7 @@ int lib_ring_buffer_snapshot(struct lib_ring_buffer *buf,
        int finalized;
 
 retry:
-       finalized = READ_ONCE(buf->finalized);
+       finalized = LTTNG_READ_ONCE(buf->finalized);
        /*
         * Read finalized before counters.
         */
@@ -1245,7 +1245,7 @@ int lib_ring_buffer_get_subbuf(struct lib_ring_buffer *buf,
                return -EBUSY;
        }
 retry:
-       finalized = READ_ONCE(buf->finalized);
+       finalized = LTTNG_READ_ONCE(buf->finalized);
        /*
         * Read finalized before counters.
         */
@@ -1957,6 +1957,16 @@ void lib_ring_buffer_switch_remote_empty(struct lib_ring_buffer *buf)
 }
 EXPORT_SYMBOL_GPL(lib_ring_buffer_switch_remote_empty);
 
+void lib_ring_buffer_clear(struct lib_ring_buffer *buf)
+{
+       struct lib_ring_buffer_backend *bufb = &buf->backend;
+       struct channel *chan = bufb->chan;
+
+       lib_ring_buffer_switch_remote(buf);
+       lib_ring_buffer_clear_reader(buf, chan);
+}
+EXPORT_SYMBOL_GPL(lib_ring_buffer_clear);
+
 /*
  * Returns :
  * 0 if ok