The patch titled
futex_find_get_task(): remove an obscure EXIT_ZOMBIE check
has been removed from the -mm tree. Its filename is
futex_find_get_task-remove-an-obscure-exit_zombie-check.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: futex_find_get_task(): remove an obscure EXIT_ZOMBIE check
From: Oleg Nesterov <oleg@xxxxxxxxxx>
futex_find_get_task:
if (p->state == EXIT_ZOMBIE || p->exit_state == EXIT_ZOMBIE)
return NULL;
I can't understand this. First, p->state can't be EXIT_ZOMBIE. The
->exit_state check looks strange too. Sub-threads or tasks whose ->parent
ignores SIGCHLD go directly to EXIT_DEAD state (I am ignoring a ptrace
case). Why EXIT_DEAD tasks should be ok? Yes, EXIT_ZOMBIE is more
important (a task may stay zombie for a long time), but this doesn't mean
we should explicitely ignore other EXIT_XXX states.
Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx>
Acked-by: Ingo Molnar <mingo@xxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
kernel/futex.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN kernel/futex.c~futex_find_get_task-remove-an-obscure-exit_zombie-check kernel/futex.c
--- a/kernel/futex.c~futex_find_get_task-remove-an-obscure-exit_zombie-check
+++ a/kernel/futex.c
@@ -397,7 +397,7 @@ static struct task_struct * futex_find_g
p = NULL;
goto out_unlock;
}
- if (p->state == EXIT_ZOMBIE || p->exit_state == EXIT_ZOMBIE) {
+ if (p->exit_state != 0) {
p = NULL;
goto out_unlock;
}
_
Patches currently in -mm which might be from oleg@xxxxxxxxxx are
pid-implement-transfer_pid-and-use-it-to-simplify-de_thread.patch
pid-remove-temporary-debug-code-in-attach_pid.patch
rtmutex-clean-up-and-remove-some-extra-spinlocks.patch
rtmutex-clean-up-and-remove-some-extra-spinlocks-more.patch
elf_core_dump-dont-take-tasklist_lock.patch
elf_fdpic_core_dump-dont-take-tasklist_lock.patch
has_stopped_jobs-cleanup.patch
__dequeue_signal-cleanup.patch
do_sched_setscheduler-dont-take-tasklist_lock.patch
introduce-is_rt_policy-helper.patch
sched_setscheduler-fix-policy-checks.patch
reparent_to_init-use-has_rt_policy.patch
copy_process-cosmetic-ioprio-tweak.patch
futex_find_get_task-dont-take-tasklist_lock.patch
sys_get_robust_list-dont-take-tasklist_lock.patch
set-exit_dead-state-in-do_exit-not-in-schedule.patch
kill-pf_dead-flag.patch
introduce-task_dead-state.patch
simplify-pid-iterators.patch
pidhash-temporary-debug-checks.patch
-
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