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[PATCH] Call exit_itimers from do_exit, not __exit_signal

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When I originally moved exit_itimers into __exit_signal, that was the only
place where we could reliably know it was the last thread in the group
dying, without races.  Since then we've gotten the signal_struct.live
counter, and do_exit can reliably do group-wide cleanup work.

This patch moves the call to do_exit, where it's made without locks.  This
avoids the deadlock issues that the old __exit_signal code's comment talks
about, and the one that Oleg found recently with process CPU timers.

[ This replaces e03d13e985, which is why
  it was just reverted. ]

Signed-off-by: Roland McGrath <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Roland McGrath 2005-10-21 15:03:29 -07:00 • committed by Linus Torvalds
commit 25f407f0b6
3 changed files with 3 additions and 14 deletions
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2
kernel/posix-timers.c
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@ -1157,7 +1157,7 @@ retry_delete:
}
/*
* This is called by __exit_signal, only when there are no more
* This is called by do_exit or de_thread, only when there are no more
* references to the shared signal_struct.
*/
void exit_itimers(struct signal_struct *sig)