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

The latest version of grep is deprecating the egrep command, so that
its output contains warnings as follows:

	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/rcutorture`

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>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/tools/testing/selftests/rcutorture/bin/kvm-find-errors.sh b/tools/testing/selftests/rcutorture/bin/kvm-find-errors.sh
index d4dc059843a4..28981007465b 100755
--- a/tools/testing/selftests/rcutorture/bin/kvm-find-errors.sh
+++ b/tools/testing/selftests/rcutorture/bin/kvm-find-errors.sh
@@ -32,9 +32,9 @@ for i in ${rundir}/*/Make.out
 do
 	scenariodir="`dirname $i`"
 	scenariobasedir="`echo ${scenariodir} | sed -e 's/\.[0-9]*$//'`"
-	if egrep -q "error:|warning:|^ld: .*undefined reference to" < $i
+	if grep -E -q "error:|warning:|^ld: .*undefined reference to" < $i
 	then
-		egrep "error:|warning:|^ld: .*undefined reference to" < $i > $i.diags
+		grep -E "error:|warning:|^ld: .*undefined reference to" < $i > $i.diags
 		files="$files $i.diags $i"
 	elif ! test -f ${scenariobasedir}/vmlinux && ! test -f ${scenariobasedir}/vmlinux.xz && ! test -f "${rundir}/re-run"
 	then