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perf_events, x86: Fix event constraints code

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There was namespace overlap due to a rename i did - this caused
the following build warning, reported by Stephen Rothwell against
linux-next x86_64 allmodconfig:

  arch/x86/kernel/cpu/perf_event.c: In function 'intel_get_event_idx':
  arch/x86/kernel/cpu/perf_event.c:1445: warning: 'event_constraint' is used uninitialized in this function

This is a real bug not just a warning: fix it by renaming the
global event-constraints table pointer to 'event_constraints'.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Stephane Eranian <eranian@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <20091013144223.369d616d.sfr@canb.auug.org.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar 2009-10-13 08:16:30 +02:00
parent 55ffb7a6bd
commit 7a693d3f0d
1 changed files with 7 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
arch/x86/kernel/cpu/perf_event.c
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@ -124,7 +124,7 @@ static DEFINE_PER_CPU(struct cpu_hw_events, cpu_hw_events) = {
.enabled = 1,
};
static const struct event_constraint *event_constraint;
static const struct event_constraint *event_constraints;
/*
* Not sure about some of these
@ -1442,12 +1442,12 @@ intel_get_event_idx(struct cpu_hw_events *cpuc, struct hw_perf_event *hwc)
const struct event_constraint *event_constraint;
int i, code;
if (!event_constraint)
if (!event_constraints)
goto skip;
code = hwc->config & CORE_EVNTSEL_EVENT_MASK;
for_each_event_constraint(event_constraint, event_constraint) {
for_each_event_constraint(event_constraint, event_constraints) {
if (code == event_constraint->code) {
for_each_bit(i, event_constraint->idxmsk, X86_PMC_IDX_MAX) {
if (!test_and_set_bit(i, cpuc->used_mask))
@ -2047,12 +2047,12 @@ static int p6_pmu_init(void)
case 7:
case 8:
case 11: /* Pentium III */
event_constraint = intel_p6_event_constraints;
event_constraints = intel_p6_event_constraints;
break;
case 9:
case 13:
/* Pentium M */
event_constraint = intel_p6_event_constraints;
event_constraints = intel_p6_event_constraints;
break;
default:
pr_cont("unsupported p6 CPU model %d ",
@ -2124,14 +2124,14 @@ static int intel_pmu_init(void)
sizeof(hw_cache_event_ids));
pr_cont("Core2 events, ");
event_constraint = intel_core_event_constraints;
event_constraints = intel_core_event_constraints;
break;
default:
case 26:
memcpy(hw_cache_event_ids, nehalem_hw_cache_event_ids,
sizeof(hw_cache_event_ids));
event_constraint = intel_nehalem_event_constraints;
event_constraints = intel_nehalem_event_constraints;
pr_cont("Nehalem/Corei7 events, ");
break;
case 28: