[PATCH] Remove redhat'ism from ftrace selftests.

[Dave Jones <davej@codemonkey.org.uk>]

usleep(1) is a Red Hat'ism (bizarrely provided by initscripts),
that isn't available on other distributions.
To make this work elsewhere, convert to using fractional
shell sleeps.

Signed-off-by: Dave Jones <davej@codemonkey.org.uk>

diff --git a/tools/testing/selftests/ftrace/test.d/event/event-enable.tc b/tools/testing/selftests/ftrace/test.d/event/event-enable.tc
index 668616d9bb03..ecc74d801b97 100644
--- a/tools/testing/selftests/ftrace/test.d/event/event-enable.tc
+++ b/tools/testing/selftests/ftrace/test.d/event/event-enable.tc
@@ -21,7 +21,7 @@ reset_tracer
 do_reset
 
 echo 'sched:sched_switch' > set_event
-usleep 1
+sleep 0.1
 
 count=`cat trace | grep sched_switch | wc -l`
 if [ $count -eq 0 ]; then
@@ -31,7 +31,7 @@ fi
 do_reset
 
 echo 1 > events/sched/sched_switch/enable
-usleep 1
+sleep 0.1
 
 count=`cat trace | grep sched_switch | wc -l`
 if [ $count -eq 0 ]; then
@@ -41,7 +41,7 @@ fi
 do_reset
 
 echo 0 > events/sched/sched_switch/enable
-usleep 1
+sleep 0.1
 
 count=`cat trace | grep sched_switch | wc -l`
 if [ $count -ne 0 ]; then
diff --git a/tools/testing/selftests/ftrace/test.d/event/subsystem-enable.tc b/tools/testing/selftests/ftrace/test.d/event/subsystem-enable.tc
index 655c415b6e7f..019766c59db2 100644
--- a/tools/testing/selftests/ftrace/test.d/event/subsystem-enable.tc
+++ b/tools/testing/selftests/ftrace/test.d/event/subsystem-enable.tc
@@ -21,7 +21,7 @@ reset_tracer
 do_reset
 
 echo 'sched:*' > set_event
-usleep 1
+sleep 0.1
 
 count=`cat trace | grep -v ^# | awk '{ print $5 }' | sort -u | wc -l`
 if [ $count -lt 3 ]; then
@@ -31,7 +31,7 @@ fi
 do_reset
 
 echo 1 > events/sched/enable
-usleep 1
+sleep 0.1
 
 count=`cat trace | grep -v ^# | awk '{ print $5 }' | sort -u | wc -l`
 if [ $count -lt 3 ]; then
@@ -41,7 +41,7 @@ fi
 do_reset
 
 echo 0 > events/sched/enable
-usleep 1
+sleep 0.1
 
 count=`cat trace | grep -v ^# | awk '{ print $5 }' | sort -u | wc -l`
 if [ $count -ne 0 ]; then