diff --git a/dub.json b/dub.json
index d94df0a..faa2699 100644
--- a/dub.json
+++ b/dub.json
@@ -216,7 +216,7 @@
 		},
 		{
 			"name": "jpeg",
-			"description": "Dependency-free partial JPEG file format read support",
+			"description": "Dependency-free partial JPEG file format read and write support",
 			"importPaths": ["."],
 			"targetType": "library",
 			"dflags": ["-mv=arsd.jpeg=jpeg.d"],
diff --git a/gpio.d b/gpio.d
index c993795..aa1f37b 100644
--- a/gpio.d
+++ b/gpio.d
@@ -1,3 +1,6 @@
+// See:  https://github.com/torvalds/linux/commit/b53911aa872db462be2e5f1dd611b25c4c2e663b
+// and:  https://github.com/torvalds/linux/blob/a409ed156a90093a03fe6a93721ddf4c591eac87/include/uapi/linux/gpio.h
+// the kernel didn't keep the v1 abi for long, there's a v2 thing less than a year later. This v2 thing is new in kernel 5.10
 /++
 	PRERELEASE EXPERIMENTAL MODULE / SUBJECT TO CHANGE WITHOUT WARNING / LIKELY TO CONTAIN BUGS