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Merge tag 'tasklets-v5.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

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Pull tasklets API update from Kees Cook:
 "These are the infrastructure updates needed to support converting the
  tasklet API to something more modern (and hopefully for removal
  further down the road).

  There is a 300-patch series waiting in the wings to get set out to
  subsystem maintainers, but these changes need to be present in the
  kernel first. Since this has some treewide changes, I carried this
  series for -next instead of paining Thomas with it in -tip, but it's
  got his Ack.

  This is similar to the timer_struct modernization from a while back,
  but not nearly as messy (I hope). :)

   - Prepare for tasklet API modernization (Romain Perier, Allen Pais,
     Kees Cook)"

* tag 'tasklets-v5.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  tasklet: Introduce new initialization API
  treewide: Replace DECLARE_TASKLET() with DECLARE_TASKLET_OLD()
  usb: gadget: udc: Avoid tasklet passing a global
This commit is contained in:
Linus Torvalds
2020-08-04 13:40:35 -07:00
parent 5b5d3be5d6 12cc923f1c
commit 427714f258
17 changed files with 70 additions and 25 deletions
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18
kernel/softirq.c
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@@ -553,7 +553,10 @@ static void tasklet_action_common(struct softirq_action *a,
if (!test_and_clear_bit(TASKLET_STATE_SCHED,
&t->state))
BUG();
t->func(t->data);
if (t->use_callback)
t->callback(t);
else
t->func(t->data);
tasklet_unlock(t);
continue;
}
@@ -579,6 +582,18 @@ static __latent_entropy void tasklet_hi_action(struct softirq_action *a)
tasklet_action_common(a, this_cpu_ptr(&tasklet_hi_vec), HI_SOFTIRQ);
}
void tasklet_setup(struct tasklet_struct *t,
void (*callback)(struct tasklet_struct *))
{
t->next = NULL;
t->state = 0;
atomic_set(&t->count, 0);
t->callback = callback;
t->use_callback = true;
t->data = 0;
}
EXPORT_SYMBOL(tasklet_setup);
void tasklet_init(struct tasklet_struct *t,
void (*func)(unsigned long), unsigned long data)
{
@@ -586,6 +601,7 @@ void tasklet_init(struct tasklet_struct *t,
t->state = 0;
atomic_set(&t->count, 0);
t->func = func;
t->use_callback = false;
t->data = data;
}
EXPORT_SYMBOL(tasklet_init);