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authorRussell King <rmk+kernel@arm.linux.org.uk>2011-11-22 20:44:19 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2011-11-22 20:44:19 +0000
commit7334c6755eb7dbaa5d3112a33f5f2cb9826abe8c (patch)
treef4937b349b3dae67725d24a3b08c9a973ffc57c4 /arch/arm/kernel
parent53cbcbcf4362ef39e0a692b1d23c395999397fca (diff)
parente5a21327644adba32816f74a415114d11c57f2e9 (diff)
Merge branch 'for-rmk' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into fixes
Diffstat (limited to 'arch/arm/kernel')
-rw-r--r--arch/arm/kernel/perf_event.c11
-rw-r--r--arch/arm/kernel/pmu.c1
2 files changed, 11 insertions, 1 deletions
diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c
index 24e2347be6b..c475379199b 100644
--- a/arch/arm/kernel/perf_event.c
+++ b/arch/arm/kernel/perf_event.c
@@ -343,8 +343,14 @@ validate_group(struct perf_event *event)
{
struct perf_event *sibling, *leader = event->group_leader;
struct pmu_hw_events fake_pmu;
+ DECLARE_BITMAP(fake_used_mask, ARMPMU_MAX_HWEVENTS);
- memset(&fake_pmu, 0, sizeof(fake_pmu));
+ /*
+ * Initialise the fake PMU. We only need to populate the
+ * used_mask for the purposes of validation.
+ */
+ memset(fake_used_mask, 0, sizeof(fake_used_mask));
+ fake_pmu.used_mask = fake_used_mask;
if (!validate_event(&fake_pmu, leader))
return -ENOSPC;
@@ -396,6 +402,9 @@ armpmu_reserve_hardware(struct arm_pmu *armpmu)
int i, err, irq, irqs;
struct platform_device *pmu_device = armpmu->plat_device;
+ if (!pmu_device)
+ return -ENODEV;
+
err = reserve_pmu(armpmu->type);
if (err) {
pr_warning("unable to reserve pmu\n");
diff --git a/arch/arm/kernel/pmu.c b/arch/arm/kernel/pmu.c
index 2c3407ee857..2334bf8a650 100644
--- a/arch/arm/kernel/pmu.c
+++ b/arch/arm/kernel/pmu.c
@@ -33,3 +33,4 @@ release_pmu(enum arm_pmu_type type)
{
clear_bit_unlock(type, pmu_lock);
}
+EXPORT_SYMBOL_GPL(release_pmu);