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-rw-r--r--Documentation/DMA-API.txt3
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/DMA-API.txt b/Documentation/DMA-API.txt
index cc7a8c39fb6f..b939ebb62871 100644
--- a/Documentation/DMA-API.txt
+++ b/Documentation/DMA-API.txt
@@ -68,6 +68,9 @@ size and dma_handle must all be the same as those passed into the
consistent allocate. cpu_addr must be the virtual address returned by
the consistent allocate.
+Note that unlike their sibling allocation calls, these routines
+may only be called with IRQs enabled.
+
Part Ib - Using small dma-coherent buffers
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