Merge tag 'for-4.12/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm

Pull device mapper fixes from Mike Snitzer:

 - DM cache metadata fixes to short-circuit operations that require the
   metadata not be in 'fail_io' mode. Otherwise crashes are possible.

 - a DM cache fix to address the inability to adapt to continuous IO
   that happened to also reflect a changing working set (which required
   old blocks be demoted before the new working set could be promoted)

 - a DM cache smq policy cleanup that fell out from reviewing the above

 - fix the Kconfig help text for CONFIG_DM_INTEGRITY

* tag 'for-4.12/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
  dm cache metadata: fail operations if fail_io mode has been established
  dm integrity: improve the Kconfig help text for DM_INTEGRITY
  dm cache policy smq: cleanup free_target_met() and clean_target_met()
  dm cache policy smq: allow demotions to happen even during continuous IO

1 files changed, 13 insertions, 2 deletions

diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig
index 349ff8813401..906103c168ea 100644
--- a/drivers/md/Kconfig
+++ b/drivers/md/Kconfig
@@ -503,13 +503,24 @@ config DM_LOG_WRITES
 	  If unsure, say N.
 
 config DM_INTEGRITY
-	tristate "Integrity target"
+	tristate "Integrity target support"
 	depends on BLK_DEV_DM
 	select BLK_DEV_INTEGRITY
 	select DM_BUFIO
 	select CRYPTO
 	select ASYNC_XOR
 	---help---
-	   This is the integrity target.
+	  This device-mapper target emulates a block device that has
+	  additional per-sector tags that can be used for storing
+	  integrity information.
+
+	  This integrity target is used with the dm-crypt target to
+	  provide authenticated disk encryption or it can be used
+	  standalone.
+
+	  To compile this code as a module, choose M here: the module will
+	  be called dm-integrity.
+
+	  If unsure, say N.
 
 endif # MD