linux-kernel - Re: [PATCH 03/19] context_tracking: Rename context_tracking_enter/exit() to ct_user

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Date:   Sat, 5 Mar 2022 15:02:33 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Frederic Weisbecker <frederic@...nel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>, Phil Auld <pauld@...hat.com>,
        Alex Belits <abelits@...vell.com>,
        Nicolas Saenz Julienne <nsaenz@...nel.org>,
        Xiongfeng Wang <wangxiongfeng2@...wei.com>,
        Neeraj Upadhyay <quic_neeraju@...cinc.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Yu Liao <liaoyu15@...wei.com>,
        Boqun Feng <boqun.feng@...il.com>,
        "Paul E . McKenney" <paulmck@...nel.org>,
        Marcelo Tosatti <mtosatti@...hat.com>,
        Paul Gortmaker <paul.gortmaker@...driver.com>,
        Uladzislau Rezki <uladzislau.rezki@...y.com>,
        Joel Fernandes <joel@...lfernandes.org>
Subject: Re: [PATCH 03/19] context_tracking: Rename
 context_tracking_enter/exit() to ct_user_enter/exit()

On Wed, Mar 02, 2022 at 04:47:54PM +0100, Frederic Weisbecker wrote:
> diff --git a/kernel/context_tracking.c b/kernel/context_tracking.c
> index 83e050675b23..e8e58c10f135 100644
> --- a/kernel/context_tracking.c
> +++ b/kernel/context_tracking.c
> @@ -103,7 +103,7 @@ void noinstr __ct_user_enter(enum ctx_state state)
>  }
>  EXPORT_SYMBOL_GPL(__ct_user_enter);
>  
> -void context_tracking_enter(enum ctx_state state)
> +void ct_user_enter(enum ctx_state state)
>  {
>  	unsigned long flags;
>  
> @@ -122,8 +122,8 @@ void context_tracking_enter(enum ctx_state state)
>  	__ct_user_enter(state);
>  	local_irq_restore(flags);
>  }
> -NOKPROBE_SYMBOL(context_tracking_enter);
> -EXPORT_SYMBOL_GPL(context_tracking_enter);
> +NOKPROBE_SYMBOL(ct_user_enter);
> +EXPORT_SYMBOL_GPL(ct_user_enter);
>  
>  /**
>   * user_enter_callable() - Unfortunate ASM callable version of user_enter() for
> @@ -173,7 +173,7 @@ void noinstr __ct_user_exit(enum ctx_state state)
>  }
>  EXPORT_SYMBOL_GPL(__ct_user_exit);
>  
> -void context_tracking_exit(enum ctx_state state)
> +void ct_user_exit(enum ctx_state state)
>  {
>  	unsigned long flags;
>  
> @@ -184,8 +184,8 @@ void context_tracking_exit(enum ctx_state state)
>  	__ct_user_exit(state);
>  	local_irq_restore(flags);
>  }
> -NOKPROBE_SYMBOL(context_tracking_exit);
> -EXPORT_SYMBOL_GPL(context_tracking_exit);
> +NOKPROBE_SYMBOL(ct_user_exit);
> +EXPORT_SYMBOL_GPL(ct_user_exit);
>  
>  /**
>   * user_exit_callable() - Unfortunate ASM callable version of user_exit() for

Why is it NOKPROBE but not notrace, also local_irq_*() include explicit
tracepoints.