[PATCH] dm-crypt: add Kconfig switch to enable authenticated mode.

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The switch just enables dm-integrity module but it makes
configuration more logic and user friendly.

Signed-off-by: Milan Broz <gmazyland@xxxxxxxxx>
---
 drivers/md/Kconfig | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig
index 3e96fccbbdb2..134f885c6be1 100644
--- a/drivers/md/Kconfig
+++ b/drivers/md/Kconfig
@@ -285,6 +285,17 @@ config DM_CRYPT
 
 	  If unsure, say N.
 
+config DM_CRYPT_AEAD
+	tristate "Crypt target support for authenticated disk encrytion modes"
+	depends on DM_CRYPT
+	select DM_INTEGRITY
+	---help---
+	  This option enables dm-integrity target that is required in dm-crypt
+	  for support of authenticated encryption modes (it enables additional
+	  per-sector metadata for authentication tags).
+
+	  If unsure, say N.
+
 config DM_SNAPSHOT
        tristate "Snapshot target"
        depends on BLK_DEV_DM
-- 
2.11.0

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