Add raw spinlock wrapper for kernels < 2.6.33

[lttng-modules.git] / ltt-debugfs-abi.c

diff --git a/ltt-debugfs-abi.c b/ltt-debugfs-abi.c
index aa8dc0f4a0d973af21f4739aa373170cfb63a9d6..6327d09a65d713fde5e6dd36dbf269163f9ad257 100644 (file)
--- a/ltt-debugfs-abi.c
+++ b/ltt-debugfs-abi.c
@@ -196,6 +196,8 @@ long lttng_abi_add_context(struct file *file,
  *             Returns the LTTng kernel tracer version
  *     LTTNG_KERNEL_TRACEPOINT_LIST
  *             Returns a file descriptor listing available tracepoints
+ *     LTTNG_KERNEL_WAIT_QUIESCENT
+ *             Returns after all previously running probes have completed
  *
  * The returned session will be deleted when its file descriptor is closed.
  */
@@ -210,6 +212,9 @@ long lttng_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
                                (struct lttng_kernel_tracer_version __user *) arg);
        case LTTNG_KERNEL_TRACEPOINT_LIST:
                return lttng_abi_tracepoint_list();
+       case LTTNG_KERNEL_WAIT_QUIESCENT:
+               synchronize_trace();
+               return 0;
        default:
                return -ENOIOCTLCMD;
        }