selftests/ftrace: Support ":README" suffix for requires

Add ":README" suffix support for the requires list, so that
the testcase can list up the required string for README file
to the requires list.

Note that the required string is treated as a fixed string,
instead of regular expression. Also, the testcase can specify
a string containing spaces with quotes. E.g.

# requires: "place: [<module>:]<symbol>":README

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Reviewed-by: Tom Zanussi <zanussi@kernel.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

1 files changed, 7 insertions, 1 deletions

diff --git a/tools/testing/selftests/ftrace/test.d/functions b/tools/testing/selftests/ftrace/test.d/functions
index 35de6bc9613b..c5dec55b7d95 100644
--- a/tools/testing/selftests/ftrace/test.d/functions
+++ b/tools/testing/selftests/ftrace/test.d/functions
@@ -107,13 +107,19 @@ initialize_ftrace() { # Reset ftrace to initial-state
 }
 
 check_requires() { # Check required files and tracers
-    for i in $* ; do
+    for i in "$@" ; do
+        r=${i%:README}
         t=${i%:tracer}
         if [ $t != $i ]; then
             if ! grep -wq $t available_tracers ; then
                 echo "Required tracer $t is not configured."
                 exit_unsupported
             fi
+        elif [ $r != $i ]; then
+            if ! grep -Fq "$r" README ; then
+                echo "Required feature pattern \"$r\" is not in README."
+                exit_unsupported
+            fi
         elif [ ! -e $i ]; then
             echo "Required feature interface $i doesn't exist."
             exit_unsupported