Commit 9232c3c7 authored May 31, 2017 by Hendrik Brueckner Committed by Martin Schwidefsky Nov 16, 2017

s390/cpum_sf: do not register PMU if no sampling mode is authorized



Previously, the cpum_sf PMU was registered even if there is no
sampling mode authorized.  Add a check and register cpum_sf only
at least one sampling mode is authorized.

Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

parent 3d43b981

arch/s390/kernel/perf_cpum_sf.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -1938,6 +1938,9 @@ static int __init init_cpum_sampling_pmu(void)
		return -ENODEV;
		}

		if (!si.as && !si.ad)
		return -ENODEV;

		if (si.bsdes != sizeof(struct hws_basic_entry)) {
		pr_cpumsf_err(RS_INIT_FAILURE_BSDES);
		return -EINVAL;