linux-kernel - [RFC PATCH 3/4] selftests: rseq: define __rseq

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Message-Id: <20200714030348.6214-4-mathieu.desnoyers@efficios.com>
Date:   Mon, 13 Jul 2020 23:03:47 -0400
From:   Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        "Paul E . McKenney" <paulmck@...ux.ibm.com>,
        Boqun Feng <boqun.feng@...il.com>,
        "H . Peter Anvin" <hpa@...or.com>, Paul Turner <pjt@...gle.com>,
        linux-api@...r.kernel.org,
        Christian Brauner <christian.brauner@...ntu.com>,
        Florian Weimer <fw@...eb.enyo.de>, carlos@...hat.com,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Subject: [RFC PATCH 3/4] selftests: rseq: define __rseq_abi with extensible size

Define the __rseq_abi with the extensible size feature.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
---
 tools/testing/selftests/rseq/rseq.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/testing/selftests/rseq/rseq.c b/tools/testing/selftests/rseq/rseq.c
index da2264c679b9..2c29215d4790 100644
--- a/tools/testing/selftests/rseq/rseq.c
+++ b/tools/testing/selftests/rseq/rseq.c
@@ -26,6 +26,7 @@
 #include <assert.h>
 #include <signal.h>
 #include <limits.h>
+#include <stddef.h>
 
 #include "rseq.h"
 
@@ -33,6 +34,8 @@
 
 __thread volatile struct rseq __rseq_abi = {
 	.cpu_id = RSEQ_CPU_ID_UNINITIALIZED,
+	.flags = RSEQ_TLS_FLAG_SIZE,
+	.user_size = offsetof(struct rseq, end),
 };
 
 /*
-- 
2.17.1