linux-kernel - Re: [PATCH -tip/master 3/7] locking/mcs: Remove obsolete comment

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Date:	Mon, 28 Jul 2014 09:49:35 -0700
From:	Jason Low <jason.low2@...com>
To:	Davidlohr Bueso <davidlohr@...com>
Cc:	peterz@...radead.org, mingo@...nel.org, aswin@...com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH -tip/master 3/7] locking/mcs: Remove obsolete comment

On Sun, 2014-07-27 at 22:18 -0700, Davidlohr Bueso wrote:
> ... as we clearly inline mcs_spin_lock() now.
> 
> Signed-off-by: Davidlohr Bueso <davidlohr@...com>
> ---
>  kernel/locking/mcs_spinlock.h | 3 ---
>  1 file changed, 3 deletions(-)
> 
> diff --git a/kernel/locking/mcs_spinlock.h b/kernel/locking/mcs_spinlock.h
> index 23e89c5..4d60986 100644
> --- a/kernel/locking/mcs_spinlock.h
> +++ b/kernel/locking/mcs_spinlock.h
> @@ -56,9 +56,6 @@ do {									\
>   * If the lock has already been acquired, then this will proceed to spin
>   * on this node->locked until the previous lock holder sets the node->locked
>   * in mcs_spin_unlock().
> - *
> - * We don't inline mcs_spin_lock() so that perf can correctly account for the
> - * time spent in this lock function.
>   */
>  static inline
>  void mcs_spin_lock(struct mcs_spinlock **lock, struct mcs_spinlock *node)

Likewise, I'm wondering if we should make this function noinline so that
"perf can correctly account for the time spent in this lock function".


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