selftests/membarrier: introduce helper to get membarrier command registrations

Patch series "selftests/membarrier: Skip an unregistered memory barrier
test on Musl".

The membarrier test "membarrier MEMBARRIER_CMD_PRIVATE_EXPEDITED not
registered failure" fails in the multithreaded test scenario when using
Musl libc as the command gets preregistered implicitly during thread
creation.  Skip the test if command registration is detected.


This patch (of 2):

Add a new membarrier_get_registrations() for reusage.

Link: https://lore.kernel.org/20260803124900.3328789-1-christian.gellermann@codasip.com
Link: https://lore.kernel.org/20260803124900.3328789-2-christian.gellermann@codasip.com
Signed-off-by: Chris Gellermann <christian.gellermann@codasip.com>
Tested-by: Michael Jeanson <mjeanson@efficios.com>
Cc: Ben Segall <bsegall@google.com>
Cc: Dietmar Eggemann <dietmar.eggemann@arm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: K Prateek Nayak <kprateek.nayak@amd.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: "Paul E . McKenney" <paulmck@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Valentin Schneider <vschneid@redhat.com>
Cc: Vincent Guittot <vincent.guittot@linaro.org>
Cc: Wei Yang <richard.weiyang@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

0 files changed, 0 insertions, 0 deletions