linux/kernel/irq
Oleg Nesterov 4d1d61a6b2 genirq: reimplement exit_irq_thread() hook via task_work_add()
exit_irq_thread() and task->irq_thread are needed to handle the unexpected
(and unlikely) exit of irq-thread.

We can use task_work instead and make this all private to
kernel/irq/manage.c, cleanup plus micro-optimization.

1. rename exit_irq_thread() to irq_thread_dtor(), make it
   static, and move it up before irq_thread().

2. change irq_thread() to do task_work_add(irq_thread_dtor)
   at the start and task_work_cancel() before return.

   tracehook_notify_resume() can never play with kthreads,
   only do_exit()->exit_task_work() can call the callback
   and this is what we want.

3. remove task_struct->irq_thread and the special hook
   in do_exit().

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: David Howells <dhowells@redhat.com>
Cc: Richard Kuo <rkuo@codeaurora.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Alexander Gordeev <agordeev@redhat.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: David Smith <dsmith@redhat.com>
Cc: "Frank Ch. Eigler" <fche@redhat.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Larry Woodman <lwoodman@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-23 22:11:12 -04:00
..
autoprobe.c genirq: Handle pending irqs in irq_startup() 2012-02-15 11:56:59 +01:00
chip.c Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2012-05-21 20:33:19 -07:00
debug.h irq: hide debug macros so they don't collide with others. 2012-04-23 12:30:03 -04:00
devres.c devres: fix possible use after free 2011-07-25 20:57:14 -07:00
dummychip.c genirq: Remove compat code 2011-03-29 14:48:19 +02:00
generic-chip.c kernel: Fix files explicitly needing EXPORT_SYMBOL infrastructure 2011-10-31 19:30:05 -04:00
handle.c genirq: Minor readablity improvement in irq_wake_thread() 2012-03-29 11:31:52 +02:00
internals.h Merge branch 'linus' into irq/core 2012-03-13 16:35:16 +01:00
irqdesc.c genirq: export handle_edge_irq() and irq_to_desc() 2012-05-15 08:10:07 -07:00
irqdomain.c irq_domain: fix type mismatch in debugfs output format 2012-04-12 16:25:48 -06:00
Kconfig irq_domain: correct the debugfs file name 2012-04-10 22:39:17 -06:00
Makefile irq: add irq_domain translation infrastructure 2011-07-28 01:32:04 -06:00
manage.c genirq: reimplement exit_irq_thread() hook via task_work_add() 2012-05-23 22:11:12 -04:00
migration.c genirq: Adjust irq thread affinity on IRQ_SET_MASK_OK_NOCOPY return value 2012-03-30 23:13:46 +02:00
pm.c genirq: Do not consider disabled wakeup irqs 2012-05-04 23:38:50 +02:00
proc.c irq: Remove smp_affinity_list when unregister irq proc 2011-05-26 13:15:28 +02:00
resend.c genirq: Allow check_wakeup_irqs to notice level-triggered interrupts 2012-05-04 23:38:50 +02:00
settings.h genirq: Add support for per-cpu dev_id interrupts 2011-10-03 15:35:26 +02:00
spurious.c module_param: make bool parameters really bool (core code) 2012-01-13 09:32:18 +10:30