Subject s/kscan/kcsan/
On Wed, Nov 10, 2021 at 08:24PM +0000, Valentin Schneider wrote:
> Per PREEMPT_DYNAMIC, checking CONFIG_PREEMPT doesn't tell you the actual
> preemption model of the live kernel. Use the newly-introduced accessors
> instead.
>
> Signed-off-by: Valentin Schneider <valentin.schneider@xxxxxxx>
Reviewed-by: Marco Elver <elver@xxxxxxxxxx>
Though it currently doesn't compile as a module due to missing
EXPORT_SYMBOL of is_preempt*().
> ---
> kernel/kcsan/kcsan_test.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/kernel/kcsan/kcsan_test.c b/kernel/kcsan/kcsan_test.c
> index dc55fd5a36fc..14d811eb9a21 100644
> --- a/kernel/kcsan/kcsan_test.c
> +++ b/kernel/kcsan/kcsan_test.c
> @@ -1005,13 +1005,13 @@ static const void *nthreads_gen_params(const void *prev, char *desc)
> else
> nthreads *= 2;
>
> - if (!IS_ENABLED(CONFIG_PREEMPT) || !IS_ENABLED(CONFIG_KCSAN_INTERRUPT_WATCHER)) {
> + if (!is_preempt_full() || !IS_ENABLED(CONFIG_KCSAN_INTERRUPT_WATCHER)) {
> /*
> * Without any preemption, keep 2 CPUs free for other tasks, one
> * of which is the main test case function checking for
> * completion or failure.
> */
> - const long min_unused_cpus = IS_ENABLED(CONFIG_PREEMPT_NONE) ? 2 : 0;
> + const long min_unused_cpus = is_preempt_none() ? 2 : 0;
> const long min_required_cpus = 2 + min_unused_cpus;
>
> if (num_online_cpus() < min_required_cpus) {
> --
> 2.25.1
