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Revert "remove false BUG_ON() from run_posix_cpu_timers()"

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This reverts commit 3de463c7d9.

Roland has another patch that allows us to leave the BUG_ON() in place
by just making sure that the condition it tests for really is always
true.

That goes in next.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Linus Torvalds 2005-10-27 09:07:33 -07:00
parent 7a4ed937aa
commit a362f463a6
2 changed files with 26 additions and 18 deletions
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8
kernel/exit.c
View file

@ -825,6 +825,14 @@ fastcall NORET_TYPE void do_exit(long code)
tsk->flags |= PF_EXITING;
/*
* Make sure we don't try to process any timer firings
* while we are already exiting.
*/
tsk->it_virt_expires = cputime_zero;
tsk->it_prof_expires = cputime_zero;
tsk->it_sched_expires = 0;
if (unlikely(in_atomic()))
printk(KERN_INFO "note: %s[%d] exited with preempt_count %d\n",
current->comm, current->pid,

4
kernel/posix-cpu-timers.c
View file

@ -1293,11 +1293,12 @@ void run_posix_cpu_timers(struct task_struct *tsk)
#undef UNEXPIRED
BUG_ON(tsk->exit_state);
/*
* Double-check with locks held.
*/
read_lock(&tasklist_lock);
if (likely(tsk->signal != NULL)) {
spin_lock(&tsk->sighand->siglock);
/*
@ -1316,7 +1317,6 @@ void run_posix_cpu_timers(struct task_struct *tsk)
* spin until we've taken care of that timer below.
*/
spin_unlock(&tsk->sighand->siglock);
}
read_unlock(&tasklist_lock);
/*