[LTP] [PATCH 2/3] kernel/pec: switch to new checkpoint wait/wake interface

[Li Wang]

Some PEC tests were failing due to incorrect checkpoint reinitialization.
This issue was introduced by commit bf9589d5bd ("lib: moves test infrastructure
states into a shared context structure"), where the new tst_reinit() added
magic validation and can no longer be used in a standalone process.

For example:

  cn_pec 1 TINFO: Test process events connector
  cn_pec 1 TINFO: Testing fork event (nevents=10)
  tst_test.c:203: TBROK: Invalid shared memory region (bad magic)
  cn_pec 1 TBROK: tst_checkpoint wait 10000 0 failed

This patch updates the PEC test components to use the new futex-based
checkpoint mechanism via `tst_checkpoint.h`, which supports inter-process
synchronization across exec() boundaries.

Changes:

 - Replace legacy `tst_reinit()` with `TST_CHECKPOINT_WAIT(id)` and
   `TST_CHECKPOINT_WAKE(0)`
 - Remove unnecessary braces
 - Add `#include "tst_checkpoint.h"`

This improves robustness and aligns with the refactored checkpoint
infrastructure based on shared futex memory.

Follow-up: bf9589d5bd ("lib: moves test infrastructure states into a shared context structure")
Reported-by: Avinesh Kumar <akumar@suse.de>
Signed-off-by: Li Wang <liwang@redhat.com>
---
 testcases/kernel/connectors/pec/event_generator.c | 3 ++-
 testcases/kernel/connectors/pec/pec_listener.c    | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/testcases/kernel/connectors/pec/event_generator.c b/testcases/kernel/connectors/pec/event_generator.c
index 4945058ff..3110512ca 100644
--- a/testcases/kernel/connectors/pec/event_generator.c
+++ b/testcases/kernel/connectors/pec/event_generator.c
@@ -18,6 +18,7 @@
 
 #define TST_NO_DEFAULT_MAIN
 #include "tst_test.h"
+#include "tst_checkpoint.h"
 
 extern struct tst_test *tst_test;
 static struct tst_test test = {
@@ -186,7 +187,7 @@ int main(int argc, char **argv)
 
 	/* ready to generate events */
 	if (checkpoint_id != -1) {
-		tst_reinit();
+		tst_checkpoint_reinit(__FILE__, __LINE__, NULL);
 		TST_CHECKPOINT_WAIT(checkpoint_id);
 	}
 
diff --git a/testcases/kernel/connectors/pec/pec_listener.c b/testcases/kernel/connectors/pec/pec_listener.c
index 01ee91d43..2d04b2842 100644
--- a/testcases/kernel/connectors/pec/pec_listener.c
+++ b/testcases/kernel/connectors/pec/pec_listener.c
@@ -19,6 +19,7 @@
 #include <signal.h>
 #include <linux/types.h>
 #include <linux/netlink.h>
+
 #define TST_NO_DEFAULT_MAIN
 #include "tst_test.h"
 #include "tst_checkpoint.h"
@@ -307,7 +308,7 @@ int main(int argc, char * const argv[])
 
 	/* ready to receive events */
 	if (checkpoint_id != -1) {
-		tst_reinit();
+		tst_checkpoint_reinit(__FILE__, __LINE__, NULL);
 		TST_CHECKPOINT_WAKE(0);
 	}
 
-- 
2.49.0