linux-kernel - [PATCH 0/1] rseq/selftests: add __rseq

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Date:   Mon, 6 Aug 2018 13:47:00 +0200
From:   Vasily Gorbik <gor@...ux.ibm.com>
To:     Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Shuah Khan <shuah@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
        Boqun Feng <boqun.feng@...il.com>,
        linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org
Subject: [PATCH 0/1] rseq/selftests: add __rseq_abi misalignment check

While implementing rseq selftest for s390 a glibc problem with tls
variables alignment has been discovered. It turned out to be a general
problem affecting several architectures. The bug opened for this problem:

https://sourceware.org/bugzilla/show_bug.cgi?id=23403

There is no fix yet. On s390 __rseq_abi ends up aligned to 0x10 instead
of 0x20 which makes rseq selftest fail every time.

The change proposed adds __rseq_abi misalignment check, produces user
friendly message and skips the test.

Vasily Gorbik (1):
  rseq/selftests: add __rseq_abi misalignment check

 tools/testing/selftests/rseq/rseq.c           | 19 +++++++++++++++++++
 .../testing/selftests/rseq/run_param_test.sh  |  4 ++--
 2 files changed, 21 insertions(+), 2 deletions(-)

-- 
2.18.0.13.gd42ae10