selftests: net: Use "grep -E" instead of "egrep"

[ Upstream commit 6a30d3e3491dc562384e9f15b201a8a25b57439f ]

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 using "grep -E" instead.

  sed -i "s/egrep/grep -E/g" `grep egrep -rwl tools/testing/selftests/net`

Here are the steps to install the latest grep:

  wget http://ftp.gnu.org/gnu/grep/grep-3.8.tar.gz
  tar xf grep-3.8.tar.gz
  cd grep-3.8 && ./configure && make
  sudo make install
  export PATH=/usr/local/bin:$PATH

Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Link: https://lore.kernel.org/r/1669864248-829-1-git-send-email-yangtiezhu@loongson.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/tools/testing/selftests/net/toeplitz.sh b/tools/testing/selftests/net/toeplitz.sh
index 0a49907..da5bfd8 100755 (executable)
--- a/tools/testing/selftests/net/toeplitz.sh
+++ b/tools/testing/selftests/net/toeplitz.sh
@@ -32,7 +32,7 @@ DEV="eth0"
 # This is determined by reading the RSS indirection table using ethtool.
 get_rss_cfg_num_rxqs() {
        echo $(ethtool -x "${DEV}" |
-               egrep [[:space:]]+[0-9]+:[[:space:]]+ |
+               grep -E [[:space:]]+[0-9]+:[[:space:]]+ |
                cut -d: -f2- |
                awk '{$1=$1};1' |
                tr ' ' '\n' |