diff --git a/.git-blame-ignore-revs b/.git-blame-ignore-revs
index 356201cef3c9..5cc8ba2a300a 100644
--- a/.git-blame-ignore-revs
+++ b/.git-blame-ignore-revs
@@ -8,6 +8,14 @@
 #
 # This file is sorted in git log order (newest commits first).
 
+# sort OptionalObsoleteFiles.inc blocks
+c90d0600ee000e7874a55e3015953bd670574093
+2b3bf27da41f1481b2025445c6adf27f0d50de99
+fb173fc89e9c6908426bf60b1a449f1ff19d51df
+16743f0e0b1567b38e5071814d61c04b557bcaa0
+a62cefbb5c835eb17057bca98106f325b13bdead
+e70ad278f45d72a8209e61a312481910d3e03b45
+4ca5df80393e1f2bf6ac26af42fc7246acb59f71
 # elfctl whitespace
 828e50092ac84f50247fb3f400027fc7510d8141
 # regen syscall files after d51198d63b63