[PATCH] dma-buf: Documentation update for Kconfig select

[Sumit Semwal]

As per Linus' comment, dma-buf Kconfig entry shouldn't have an option
text, but should be selected by the subsystems that use it.

Add this information in the documentation as well.

Signed-off-by: Sumit Semwal <sumit.semwal at ti.com>
---
 Documentation/dma-buf-sharing.txt |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/Documentation/dma-buf-sharing.txt b/Documentation/dma-buf-sharing.txt
index 510eab3..be8eea2 100644
--- a/Documentation/dma-buf-sharing.txt
+++ b/Documentation/dma-buf-sharing.txt
@@ -219,6 +219,10 @@ NOTES:
    If the exporter chooses not to allow an attach() operation once a
    map_dma_buf() API has been called, it simply returns an error.
 
+Miscellaneous notes:
+- Any exporters or users of the dma-buf buffer sharing framework must have
+  a 'select DMA_SHARED_BUFFER' in their respective Kconfigs.
+
 References:
 [1] struct dma_buf_ops in include/linux/dma-buf.h
 [2] All interfaces mentioned above defined in include/linux/dma-buf.h
-- 
1.7.5.4