linux-kernel - [RFC PATCH 4/4] rseq/selftests: Use RSEQ_FLAG_UNREG_CLONE

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Date:   Tue, 10 Sep 2019 20:27:44 -0400
From:   Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Paul Turner <pjt@...gle.com>
Cc:     linux-kernel@...r.kernel.org,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Shuah Khan <skhan@...uxfoundation.org>,
        "Paul E. McKenney" <paulmck@...ux.ibm.com>,
        Boqun Feng <boqun.feng@...il.com>,
        "H . Peter Anvin" <hpa@...or.com>,
        Dmitry Vyukov <dvyukov@...gle.com>
Subject: [RFC PATCH 4/4] rseq/selftests: Use RSEQ_FLAG_UNREG_CLONE_FLAGS

Use the new RSEQ_FLAG_UNREG_CLONE_FLAGS rseq flag in the rseq selftests.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Cc: Shuah Khan <skhan@...uxfoundation.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Peter Zijlstra (Intel) <peterz@...radead.org>
Cc: "Paul E. McKenney" <paulmck@...ux.ibm.com>
Cc: Boqun Feng <boqun.feng@...il.com>
Cc: "H . Peter Anvin" <hpa@...or.com>
Cc: Paul Turner <pjt@...gle.com>
Cc: Dmitry Vyukov <dvyukov@...gle.com>
---
 tools/testing/selftests/rseq/rseq.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/tools/testing/selftests/rseq/rseq.c b/tools/testing/selftests/rseq/rseq.c
index 7159eb777fd3..d5268570014c 100644
--- a/tools/testing/selftests/rseq/rseq.c
+++ b/tools/testing/selftests/rseq/rseq.c
@@ -68,9 +68,10 @@ static void signal_restore(sigset_t oldset)
 }
 
 static int sys_rseq(volatile struct rseq *rseq_abi, uint32_t rseq_len,
-		    int flags, uint32_t sig)
+		    int flags, uint32_t sig, int unreg_clone_flags)
 {
-	return syscall(__NR_rseq, rseq_abi, rseq_len, flags, sig);
+	return syscall(__NR_rseq, rseq_abi, rseq_len, flags, sig,
+		       unreg_clone_flags);
 }
 
 int rseq_register_current_thread(void)
@@ -87,7 +88,9 @@ int rseq_register_current_thread(void)
 	}
 	if (__rseq_refcount++)
 		goto end;
-	rc = sys_rseq(&__rseq_abi, sizeof(struct rseq), 0, RSEQ_SIG);
+	rc = sys_rseq(&__rseq_abi, sizeof(struct rseq),
+		      RSEQ_FLAG_UNREG_CLONE_FLAGS, RSEQ_SIG,
+		      CLONE_SETTLS);
 	if (!rc) {
 		assert(rseq_current_cpu_raw() >= 0);
 		goto end;
@@ -116,7 +119,7 @@ int rseq_unregister_current_thread(void)
 	if (--__rseq_refcount)
 		goto end;
 	rc = sys_rseq(&__rseq_abi, sizeof(struct rseq),
-		      RSEQ_FLAG_UNREGISTER, RSEQ_SIG);
+		      RSEQ_FLAG_UNREGISTER, RSEQ_SIG, 0);
 	if (!rc)
 		goto end;
 	__rseq_refcount = 1;
-- 
2.17.1