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    Subject[PATCH v2 04/13] perf/hw_breakpoint: Mark data __ro_after_init
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    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 --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);

    --
    2.37.0.rc0.161.g10f37bed90-goog
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