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kselftests/ftrace: Detect tracefs mount point

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Currently ftracetest assumes tracing directory is located under
$DEBUGFS/tracing.  But it's possible to mount tracefs directly without
debugfs.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
This commit is contained in:
Namhyung Kim 2016-05-10 23:53:05 +09:00 committed by Shuah Khan
parent f55532a0c0
commit 5a614ec8a7
1 changed files with 7 additions and 2 deletions
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9
tools/testing/selftests/ftrace/ftracetest
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@ -88,7 +88,12 @@ parse_opts() { # opts
# Parameters
DEBUGFS_DIR=`grep debugfs /proc/mounts | cut -f2 -d' ' | head -1`
TRACING_DIR=$DEBUGFS_DIR/tracing
if [ -z "$DEBUGFS_DIR" ]; then
TRACING_DIR=`grep tracefs /proc/mounts | cut -f2 -d' ' | head -1`
else
TRACING_DIR=$DEBUGFS_DIR/tracing
fi
TOP_DIR=`absdir $0`
TEST_DIR=$TOP_DIR/test.d
TEST_CASES=`find_testcases $TEST_DIR`
@ -102,7 +107,7 @@ parse_opts $*
[ $DEBUG -ne 0 ] && set -x
# Verify parameters
if [ -z "$DEBUGFS_DIR" -o ! -d "$TRACING_DIR" ]; then
if [ -z "$TRACING_DIR" -o ! -d "$TRACING_DIR" ]; then
errexit "No ftrace directory found"
fi