[PATCH 2/8] perf/hw_breakpoint: Mark data __ro_after_init

Marco Elver
2022-06-09T11:31:09Z

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>
---
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 25c94c6e918d..1f718745d569 100644
--- a/kernel/events/hw_breakpoint.c
+++ b/kernel/events/hw_breakpoint.c
@@ -47,7 +47,7 @@ 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)
{
@@ -63,7 +63,7 @@ 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 {
@@ -711,7 +711,7 @@ 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);

--
2.36.1.255.ge46751e96f-goog