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Date:   Sun, 24 May 2020 13:41:17 +0530
From:   Amol Grover <>
To:     Ingo Molnar <>,
        Peter Zijlstra <>,
        Juri Lelli <>,
        Vincent Guittot <>,
        Dietmar Eggemann <>,
        Steven Rostedt <>,
        Ben Segall <>, Mel Gorman <>,
        James Morris <>,
        Thomas Gleixner <>,
        Jann Horn <>,
        David Howells <>,
        Shakeel Butt <>,
        "Eric W . Biederman" <>,
        Andrew Morton <>,
        Paul Moore <>,
        Eric Paris <>
        Joel Fernandes <>,
        Madhuparna Bhowmik <>,
        "Paul E . McKenney" <>
Subject: Re: [PATCH 1/3 RESEND] sched: Remove __rcu annotation from cred

On Thu, Apr 02, 2020 at 11:26:38AM +0530, Amol Grover wrote:
> task_struct::cred (subjective credentials) is *always* used
> task-synchronously, hence, does not require RCU semantics.
> task_struct::real_cred (objective credentials) can be used in
> RCU context and its __rcu annotation is retained.
> However, task_struct::cred and task_struct::real_cred *may*
> point to the same object, hence, the object pointed to by
> task_struct::cred *may* have RCU delayed freeing.
> Suggested-by: Jann Horn <>
> Co-developed-by: Joel Fernandes (Google) <>
> Signed-off-by: Joel Fernandes (Google) <>
> Signed-off-by: Amol Grover <>

Hello everyone,

Could you please go through patches 1/3 and 2/3 and if deemed OK, give
your acks. I sent the original patch in beginning of February (~4 months
back) and resent the patches again in beginning of April due to lack of
traffic. Paul Moore was kind enough to ack twice - the 3/3 and its
resend patch. However these 2 patches still remain. I'd really
appreciate if someone reviewed them.


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