diff --git a/fs/Kconfig b/fs/Kconfig
index 8f25c3d43f..d9f987fe08 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -43,10 +43,20 @@ config DISABLE_PSEUDOFS_OPERATIONS
 config FS_READABLE
 	bool
 	default n
+	---help---
+		Automatically selected if any readable file system is selected
 
 config FS_WRITABLE
-	bool
+	bool "Writable file system"
 	default n
+	---help---
+		Automatically selected if any writable file system is selected.
+		This selection will disable support for writing in all block drivers
+		and also the block-to-character (BCH) layer and the MTD FTL layer.
+
+		This selection can also be manually selected.  You might want to do
+		this if there are no writable file systems enabled, but you still
+		want support for write access in block drivers and/or FTL.
 
 source fs/aio/Kconfig
 source fs/semaphore/Kconfig