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-rw-r--r--include/dahdi/kernel.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/dahdi/kernel.h b/include/dahdi/kernel.h
index 4c1452c..a1424c4 100644
--- a/include/dahdi/kernel.h
+++ b/include/dahdi/kernel.h
@@ -791,7 +791,8 @@ struct dahdi_span_ops {
int (*maint)(struct dahdi_span *span, int mode);
#ifdef DAHDI_SYNC_TICK
- /*! Opt: send sync to spans */
+ /*! Opt: send sync to spans. Called in hard_irq context with chan_lock
+ * held.*/
int (*sync_tick)(struct dahdi_span *span, int is_master);
#endif
/* ==== Channel Callback Operations ==== */