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perf/hw_breakpoint: Mark data __ro_after_init 

Mark read-only data after initialization as __ro_after_init.

While we are here, turn 'constraints_initialized' into a bool.

Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
Acked-by: Ian Rogers <irogers@google.com>
Link: https://lore.kernel.org/r/20220829124719.675715-6-elver@google.com
This commit is contained in:
Marco Elver 2022-08-29 14:47:10 +02:00 committed by Peter Zijlstra
parent 0370dc314d
commit db5f6f8531
1 changed files with 3 additions and 3 deletions
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6
kernel/events/hw_breakpoint.c
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@ -46,7 +46,7 @@ struct bp_cpuinfo {
};
static DEFINE_PER_CPU(struct bp_cpuinfo, bp_cpuinfo[TYPE_MAX]);
static int nr_slots[TYPE_MAX];
static int nr_slots[TYPE_MAX] __ro_after_init;
static struct bp_cpuinfo *get_bp_info(int cpu, enum bp_type_idx type)
{
@ -62,7 +62,7 @@ static const struct rhashtable_params task_bps_ht_params = {
.automatic_shrinking = true,
};
static int constraints_initialized;
static bool constraints_initialized __ro_after_init;
/* Gather the number of total pinned and un-pinned bp in a cpuset */
struct bp_busy_slots {
@ -739,7 +739,7 @@ int __init init_hw_breakpoint(void)
if (ret)
goto err;
constraints_initialized = 1;
constraints_initialized = true;
perf_pmu_register(&perf_breakpoint, "breakpoint", PERF_TYPE_BREAKPOINT);