Garbage collection code

[Vikram Mehta]

Hi folks,

Can someone tell me what is happening in this code copied below

Specifically what does schedule at the end of the code does.

Also kindly tell me a link where I can read abt these things in detail.

With regards
Vikram

for (;;) {
  spin_lock_irq(&current->sigmask_lock);
  siginitsetinv (&current->blocked, sigmask(SIGHUP) | sigmask(SIGKILL) |
sigmask(SIGSTOP) | sigmask(SIGCONT));
  recalc_sigpending(current);
  spin_unlock_irq(&current->sigmask_lock);

  if (!thread_should_wake(c)) {
                        set_current_state (TASK_INTERRUPTIBLE);
   D1(printk(KERN_EMERG "jffs2_garbage_collect_thread sleeping. ..\n"));
   /* Yes, there's a race here; we checked thread_should_wake() before
      setting current->state to TASK_INTERRUPTIBLE. But it doesn't
      matter - We don't care if we miss a wakeup, because the GC thread
      is only an optimisation anyway. */
   schedule();
}