3  *	linux/kernel/softirq.c
38    - If a softirq needs serialization, let it serialize itself
40    - Even if softirq is serialized, only local cpu is marked for
46    - NET RX softirq. It is multithreaded and does not require
48    - NET TX softirq. It kicks software netdevice queues, hence
72  * the softirq load for us.
96  * - count is changed by SOFTIRQ_OFFSET on entering or leaving softirq
103  * softirq and whether we just have bh disabled.
110  * softirq disabled section to be preempted.
117  * the task which is in a softirq disabled section is preempted or blocks.
131  * Returns false if the per CPU softirq::cnt is 0 otherwise true.
134  * softirq pending warnings, which would happen when the task which holds
162 	 * Track the per CPU softirq disabled state. On RT this is per CPU  in __local_bh_disable_ip()
229 	 * softirq daemon.  in __local_bh_enable_ip()
237 	 * Adjust softirq count to SOFTIRQ_OFFSET which makes  in __local_bh_enable_ip()
298  * This one is for softirq.c-internal use, where hardirqs are disabled
372 	 * softirq processing:  in __local_bh_enable_ip()
378 		 * Run softirq if any pending. And do it in its own stack  in __local_bh_enable_ip()
423 		 * We can safely execute softirq on the current stack if  in invoke_softirq()
431 		 * be potentially deep already. So call softirq in its own stack  in invoke_softirq()
462  * We restart softirq processing for at most MAX_SOFTIRQ_RESTART times,
522 	 * softirq. A softirq handled, such as network RX, might set PF_MEMALLOC  in __do_softirq()
556 			pr_err("huh, entered softirq %u %s %p with preempt_count %08x, exited with %08x?\n",  in __do_softirq()
670 	 * If we're in an interrupt or softirq, we're done  in raise_softirq_irqoff()
671 	 * (this also catches softirq-disabled code). We will  in raise_softirq_irqoff()
672 	 * actually run the softirq once we return from  in raise_softirq_irqoff()
673 	 * the irq or softirq.  in raise_softirq_irqoff()
676 	 * schedule the softirq soon.  in raise_softirq_irqoff()
918 		 * We can safely run softirq on inline stack, as we are not deep  in run_ksoftirqd()
968 	cpuhp_setup_state_nocalls(CPUHP_SOFTIRQ_DEAD, "softirq:dead", NULL,  in spawn_ksoftirqd()