Index: sysutils/openzfs-kmod/files/patch-module_Makefile.bsd
===================================================================
--- /dev/null
+++ sysutils/openzfs-kmod/files/patch-module_Makefile.bsd
@@ -0,0 +1,16 @@
+--- module/Makefile.bsd.orig	2022-05-17 23:09:25 UTC
++++ module/Makefile.bsd
+@@ -372,6 +372,7 @@ CFLAGS.dmu_traverse.c= -Wno-cast-qual
+ CFLAGS.ddt.c= -Wno-cast-qual
+ CFLAGS.dmu.c= -Wno-cast-qual
+ CFLAGS.dmu_traverse.c= -Wno-cast-qual
++CFLAGS.dnode.c+= ${NO_WUNUSED_BUT_SET_VARIABLE}
+ CFLAGS.dsl_dir.c= -Wno-cast-qual
+ CFLAGS.dsl_deadlist.c= -Wno-cast-qual
+ CFLAGS.dsl_prop.c= -Wno-cast-qual
+@@ -419,3 +420,5 @@ CFLAGS.zstd_decompress_block.c= -fno-tree-vectorize -U
+ CFLAGS.zstd_ddict.c= -fno-tree-vectorize -U__BMI__
+ CFLAGS.zstd_decompress.c= -fno-tree-vectorize -U__BMI__
+ CFLAGS.zstd_decompress_block.c= -fno-tree-vectorize -U__BMI__
++CFLAGS.fse_compress.c+= ${NO_WUNUSED_BUT_SET_VARIABLE}
++CFLAGS.zstd_compress_superblock.c+= ${NO_WUNUSED_BUT_SET_VARIABLE}