lkml.org 
[lkml]   [2015]   [Apr]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] drivers: CCI: fix used_mask init in validate_group()
Date
Currently in validate_group(), there is a static initializer
for fake_pmu.used_mask which is based on CPU_BITS_NONE but
the used_mask array size is based on CCI_PMU_MAX_HW_EVENTS.
CCI_PMU_MAX_HW_EVENTS is not based on NR_CPUS, so CPU_BITS_NONE
is not correct and will cause a build failure if NR_CPUS
is set high enough to make CPU_BITS_NONE larger than used_mask.
This patch changes the used_mask initialization to be runtime
based on the actual size of the array.

Signed-off-by: Mark Salter <msalter@redhat.com>
---
drivers/bus/arm-cci.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/bus/arm-cci.c b/drivers/bus/arm-cci.c
index 84fd660..1d83072 100644
--- a/drivers/bus/arm-cci.c
+++ b/drivers/bus/arm-cci.c
@@ -679,13 +679,13 @@ static int
validate_group(struct perf_event *event)
{
struct perf_event *sibling, *leader = event->group_leader;
- struct cci_pmu_hw_events fake_pmu = {
- /*
- * Initialise the fake PMU. We only need to populate the
- * used_mask for the purposes of validation.
- */
- .used_mask = CPU_BITS_NONE,
- };
+ struct cci_pmu_hw_events fake_pmu;
+
+ /*
+ * Initialise the fake PMU. We only need to populate the
+ * used_mask for the purposes of validation.
+ */
+ memset(fake_pmu.used_mask, 0, sizeof(fake_pmu.used_mask));

if (!validate_event(&fake_pmu, leader))
return -EINVAL;
--
1.9.3


\
 
 \ /
  Last update: 2015-04-08 21:01    [W:0.056 / U:1.020 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site