diff mbox series

[v2,04/13] perf/hw_breakpoint: Mark data __ro_after_init

Message ID 20220628095833.2579903-5-elver@google.com (mailing list archive)
State New, archived
Headers show
Series perf/hw_breakpoint: Optimize for thousands of tasks | expand

Commit Message

Marco Elver June 28, 2022, 9:58 a.m. UTC 
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>
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
---
 kernel/events/hw_breakpoint.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/kernel/events/hw_breakpoint.c b/kernel/events/hw_breakpoint.c
index add1b9c59631..270be965f829 100644
--- a/kernel/events/hw_breakpoint.c
+++ b/kernel/events/hw_breakpoint.c
@@ -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 {
@@ -710,7 +710,7 @@  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);