[PATCH v1 2/2] landlock: Improve TSYNC types

[Günther Noack]

On Mon, Feb 16, 2026 at 03:26:39PM +0100, Mickaël Salaün wrote:
> Constify pointers when it makes sense.
> 
> Consistently use size_t for loops, especially to match works->size type.
> 
> Add new lines to improve readability.
> 
> Cc: Günther Noack <gnoack at google.com>
> Cc: Jann Horn <jannh at google.com>
> Signed-off-by: Mickaël Salaün <mic at digikod.net>
> ---
>  security/landlock/tsync.c | 13 ++++++++-----
>  1 file changed, 8 insertions(+), 5 deletions(-)
> 
> diff --git a/security/landlock/tsync.c b/security/landlock/tsync.c
> index 8e9b8ed7d53c..9a65e3e96186 100644
> --- a/security/landlock/tsync.c
> +++ b/security/landlock/tsync.c
> @@ -256,13 +256,14 @@ static int tsync_works_grow_by(struct tsync_works *s, size_t n, gfp_t flags)
>   * tsync_works_contains - checks for presence of task in s
>   */
>  static bool tsync_works_contains_task(const struct tsync_works *s,
> -				      struct task_struct *task)
> +				      const struct task_struct *task)
>  {
>  	size_t i;
>  
>  	for (i = 0; i < s->size; i++)
>  		if (s->works[i]->task == task)
>  			return true;
> +
>  	return false;
>  }
>  
> @@ -284,6 +285,7 @@ static void tsync_works_release(struct tsync_works *s)
>  
>  	for (i = 0; i < s->capacity; i++)
>  		kfree(s->works[i]);
> +
>  	kfree(s->works);
>  	s->works = NULL;
>  	s->size = 0;
> @@ -295,7 +297,7 @@ static void tsync_works_release(struct tsync_works *s)
>   */
>  static size_t count_additional_threads(const struct tsync_works *works)
>  {
> -	struct task_struct *thread, *caller;
> +	const struct task_struct *caller, *thread;
>  	size_t n = 0;
>  
>  	caller = current;
> @@ -334,7 +336,8 @@ static bool schedule_task_work(struct tsync_works *works,
>  			       struct tsync_shared_context *shared_ctx)
>  {
>  	int err;
> -	struct task_struct *thread, *caller;
> +	const struct task_struct *caller;
> +	struct task_struct *thread;
>  	struct tsync_work *ctx;
>  	bool found_more_threads = false;
>  
> @@ -415,10 +418,10 @@ static bool schedule_task_work(struct tsync_works *works,
>   * shared_ctx->num_preparing and shared_ctx->num_unfished and mark the two
>   * completions if needed, as if the task was never scheduled.
>   */
> -static void cancel_tsync_works(struct tsync_works *works,
> +static void cancel_tsync_works(const struct tsync_works *works,
>  			       struct tsync_shared_context *shared_ctx)
>  {
> -	int i;
> +	size_t i;
>  
>  	for (i = 0; i < works->size; i++) {
>  		if (WARN_ON_ONCE(!works->works[i]->task))
> -- 
> 2.53.0
> 

Reviewed-by: Günther Noack <gnoack at google.com>