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authorOleg Nesterov <oleg@redhat.com>2012-05-11 10:59:08 +1000
committerAl Viro <viro@zeniv.linux.org.uk>2012-05-23 22:11:12 -0400
commit4d1d61a6b203d957777d73fcebf19d90b038b5b2 (patch)
tree8b597fa00168ee59e3abf5ec8cf4e92f8fd28d8a /kernel/exit.c
parente73f8959af0439d114847eab5a8a5ce48f1217c4 (diff)
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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>
Diffstat (limited to 'kernel/exit.c')
-rw-r--r--kernel/exit.c2
1 files changed, 0 insertions, 2 deletions
diff --git a/kernel/exit.c b/kernel/exit.c
index 3d93325e0b1a..3ecd096e5d4d 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -954,8 +954,6 @@ void do_exit(long code)
exit_task_work(tsk);
- exit_irq_thread();
-
if (unlikely(in_atomic()))
printk(KERN_INFO "note: %s[%d] exited with preempt_count %d\n",
current->comm, task_pid_nr(current),