On Fri, 18 Nov 2022 17:40:29 +0800, Tiezhu Yang wrote:

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 related file to use "grep -E" instead.

  sed -i "s/egrep/grep -E/g" `grep egrep -rwl arch/powerpc`

[...]

Applied to powerpc/next.

[1/1] powerpc: Use "grep -E" instead of "egrep"
      https://git.kernel.org/powerpc/c/a9ffb8ee7b65a468474d6a2be7e9cca4b8f8ea5f

cheers