[RFC PATCH 06/20] dev_dax_iomap: Add CONFIG_DEV_DAX_IOMAP kernel build parameter

[John Groves]

Add the CONFIG_DEV_DAX_IOMAP kernel config parameter to control building
of the iomap functionality to support fsdax on devdax.

Signed-off-by: John Groves <john@xxxxxxxxxx>
---
 drivers/dax/Kconfig | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/dax/Kconfig b/drivers/dax/Kconfig
index a88744244149..b1ebcc77120b 100644
--- a/drivers/dax/Kconfig
+++ b/drivers/dax/Kconfig
@@ -78,4 +78,10 @@ config DEV_DAX_KMEM
 
 	  Say N if unsure.
 
+config DEV_DAX_IOMAP
+       depends on DEV_DAX && DAX
+       def_bool y
+       help
+         Support iomap mapping of devdax devices (for FS-DAX file
+         systems that reside on character /dev/dax devices)
 endif
-- 
2.43.0