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exit: abstract out should_wake helper for child_wait_callback()

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Abstract out the helper that decides if we should wake up following
a wake_up() callback on our internal waitqueue.

No functional changes intended in this patch.

Acked-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2023-07-11 10:31:10 -06:00
parent fc68fcda04
commit 9d900d4ea3
1 changed files with 14 additions and 6 deletions
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20
kernel/exit.c
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@ -1520,6 +1520,17 @@ static int ptrace_do_wait(struct wait_opts *wo, struct task_struct *tsk)
return 0;
}
static bool pid_child_should_wake(struct wait_opts *wo, struct task_struct *p)
{
if (!eligible_pid(wo, p))
return false;
if ((wo->wo_flags & __WNOTHREAD) && wo->child_wait.private != p->parent)
return false;
return true;
}
static int child_wait_callback(wait_queue_entry_t *wait, unsigned mode,
int sync, void *key)
{
@ -1527,13 +1538,10 @@ static int child_wait_callback(wait_queue_entry_t *wait, unsigned mode,
child_wait);
struct task_struct *p = key;
if (!eligible_pid(wo, p))
return 0;
if (pid_child_should_wake(wo, p))
return default_wake_function(wait, mode, sync, key);
if ((wo->wo_flags & __WNOTHREAD) && wait->private != p->parent)
return 0;
return default_wake_function(wait, mode, sync, key);
return 0;
}
void __wake_up_parent(struct task_struct *p, struct task_struct *parent)