--- /dev/null
+From 8ac3b5cd3e0521d92f9755e90d140382fc292510 Mon Sep 17 00:00:00 2001
+From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+Date: Tue, 20 Sep 2022 19:06:33 +0200
+Subject: lib/vdso: use "grep -E" instead of "egrep"
+
+From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+commit 8ac3b5cd3e0521d92f9755e90d140382fc292510 upstream.
+
+The latest version of grep claims the egrep is now obsolete so the build
+now contains warnings that look like:
+ egrep: warning: egrep is obsolescent; using grep -E
+fix this up by moving the vdso Makefile to use "grep -E" instead.
+
+Cc: Andy Lutomirski <luto@kernel.org>
+Cc: Thomas Gleixner <tglx@linutronix.de>
+Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
+Link: https://lore.kernel.org/r/20220920170633.3133829-1-gregkh@linuxfoundation.org
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ lib/vdso/Makefile | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/lib/vdso/Makefile
++++ b/lib/vdso/Makefile
+@@ -17,6 +17,6 @@ $(error ARCH_REL_TYPE_ABS is not set)
+ endif
+
+ quiet_cmd_vdso_check = VDSOCHK $@
+- cmd_vdso_check = if $(OBJDUMP) -R $@ | egrep -h "$(ARCH_REL_TYPE_ABS)"; \
++ cmd_vdso_check = if $(OBJDUMP) -R $@ | grep -E -h "$(ARCH_REL_TYPE_ABS)"; \
+ then (echo >&2 "$@: dynamic relocations are not supported"; \
+ rm -f $@; /bin/false); fi