[tip: perf/core] perf/hw_breakpoint: Mark data __ro_after_init

[tip-bot2 for Marco Elver]

The following commit has been merged into the perf/core branch of tip:

Commit-ID:     db5f6f853194c5e02d8551425b5e86b7e0b81806
Gitweb:        https://git.kernel.org/tip/db5f6f853194c5e02d8551425b5e86b7e0b81806
Author:        Marco Elver <elver@xxxxxxxxxx>
AuthorDate:    Mon, 29 Aug 2022 14:47:10 +02:00
Committer:     Peter Zijlstra <peterz@xxxxxxxxxxxxx>
CommitterDate: Tue, 30 Aug 2022 10:56:21 +02:00

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@xxxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Reviewed-by: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Acked-by: Ian Rogers <irogers@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20220829124719.675715-6-elver@xxxxxxxxxx
---
 kernel/events/hw_breakpoint.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/kernel/events/hw_breakpoint.c b/kernel/events/hw_breakpoint.c
index 6d09edc..7df46b2 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 {
@@ -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);