On Sat, Mar 06, 2021 at 01:36:58PM -0800, Davidlohr Bueso wrote:
> Ever since RCU was converted to softirq, it has no users.
>
> Signed-off-by: Davidlohr Bueso
That was a long time ago...
Acked-by: Paul E. McKenney
> ---
> include/linux/interrupt.h | 1 -
> kernel/softirq.c | 32
> 2 files changed, 33 deletions(-)
>
> diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
> index 967e25767153..36a2ac6baf9a 100644
> --- a/include/linux/interrupt.h
> +++ b/include/linux/interrupt.h
> @@ -712,7 +712,6 @@ static inline void tasklet_enable(struct tasklet_struct
> *t)
> }
>
> extern void tasklet_kill(struct tasklet_struct *t);
> -extern void tasklet_kill_immediate(struct tasklet_struct *t, unsigned int
> cpu);
> extern void tasklet_init(struct tasklet_struct *t,
>void (*func)(unsigned long), unsigned long data);
> extern void tasklet_setup(struct tasklet_struct *t,
> diff --git a/kernel/softirq.c b/kernel/softirq.c
> index 9908ec4a9bfe..8b44ab9a2f69 100644
> --- a/kernel/softirq.c
> +++ b/kernel/softirq.c
> @@ -658,38 +658,6 @@ static void run_ksoftirqd(unsigned int cpu)
> }
>
> #ifdef CONFIG_HOTPLUG_CPU
> -/*
> - * tasklet_kill_immediate is called to remove a tasklet which can already be
> - * scheduled for execution on @cpu.
> - *
> - * Unlike tasklet_kill, this function removes the tasklet
> - * _immediately_, even if the tasklet is in TASKLET_STATE_SCHED state.
> - *
> - * When this function is called, @cpu must be in the CPU_DEAD state.
> - */
> -void tasklet_kill_immediate(struct tasklet_struct *t, unsigned int cpu)
> -{
> - struct tasklet_struct **i;
> -
> - BUG_ON(cpu_online(cpu));
> - BUG_ON(test_bit(TASKLET_STATE_RUN, >state));
> -
> - if (!test_bit(TASKLET_STATE_SCHED, >state))
> - return;
> -
> - /* CPU is dead, so no lock needed. */
> - for (i = _cpu(tasklet_vec, cpu).head; *i; i = &(*i)->next) {
> - if (*i == t) {
> - *i = t->next;
> - /* If this was the tail element, move the tail ptr */
> - if (*i == NULL)
> - per_cpu(tasklet_vec, cpu).tail = i;
> - return;
> - }
> - }
> - BUG();
> -}
> -
> static int takeover_tasklets(unsigned int cpu)
> {
> /* CPU is dead, so no lock needed. */
> --
> 2.26.2
>
