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-rw-r--r--include/dahdi/kernel.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/dahdi/kernel.h b/include/dahdi/kernel.h
index d3beabe..69f883e 100644
--- a/include/dahdi/kernel.h
+++ b/include/dahdi/kernel.h
@@ -1395,6 +1395,12 @@ typedef u32 __bitwise pm_message_t;
#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
#endif
+/* WARN_ONCE first showed up in the kernel in 2.6.27 but it may have been
+ * backported. */
+#ifndef WARN_ONCE
+#define WARN_ONCE(condition, format...) WARN_ON_ONCE(condition)
+#endif
+
#define DAHDI_CTL 0
#define DAHDI_TRANSCODE 250
#define DAHDI_TIMER 253