From: Oleg Nesterov <oleg@redhat.com>
To: madhuparnabhowmik10@gmail.com
Cc: peterz@infradead.org, mingo@kernel.org,
christian.brauner@ubuntu.com, paulmck@kernel.org,
linux-kernel@vger.kernel.org, joel@joelfernandes.org,
linux-kernel-mentees@lists.linuxfoundation.org,
rcu@vger.kernel.org
Subject: Re: [PATCH] exit.c: Fix Sparse errors and warnings
Date: Wed, 29 Jan 2020 13:30:47 +0100 [thread overview]
Message-ID: <20200129123046.GA1726@redhat.com> (raw)
In-Reply-To: <20200128172008.22665-1-madhuparnabhowmik10@gmail.com>
On 01/28, madhuparnabhowmik10@gmail.com wrote:
>
> kernel/exit.c:626:40: warning: incorrect type in assignment
>
> Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com>
> ---
> kernel/exit.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/kernel/exit.c b/kernel/exit.c
> index bcbd59888e67..c5a9d6360440 100644
> --- a/kernel/exit.c
> +++ b/kernel/exit.c
> @@ -623,8 +623,8 @@ static void forget_original_parent(struct task_struct *father,
> reaper = find_new_reaper(father, reaper);
> list_for_each_entry(p, &father->children, sibling) {
> for_each_thread(p, t) {
> - t->real_parent = reaper;
> - BUG_ON((!t->ptrace) != (t->parent == father));
> + rcu_assign_pointer(t->real_parent, reaper);
Another case when RCU_INIT_POINTER() makes more sense (although to me it
too looks confusing). We didn't modify the new parent.
Oleg.
next prev parent reply other threads:[~2020-01-29 12:31 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-28 17:20 [PATCH] exit.c: Fix Sparse errors and warnings madhuparnabhowmik10
2020-01-28 18:01 ` Christian Brauner
2020-01-29 12:30 ` Oleg Nesterov [this message]
2020-01-29 16:02 ` Madhuparna Bhowmik
2020-01-30 6:20 madhuparnabhowmik10
2020-01-30 10:31 ` Christian Brauner
2020-01-30 11:33 ` Oleg Nesterov
2020-01-30 11:45 ` Christian Brauner
2020-01-30 15:20 ` Christian Brauner
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