linux-kernel - Re: [PATCH v4 1/2] lib/vsprintf: Remove static_branch_likely() from __ptr_to

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Message-ID: <YzbEkTzcQ0fV+Fsd@google.com>
Date:   Fri, 30 Sep 2022 19:27:29 +0900
From:   Sergey Senozhatsky <senozhatsky@...omium.org>
To:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc:     linux-kernel@...r.kernel.org, Theodore Ts'o <tytso@....edu>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        "Jason A . Donenfeld " <Jason@...c4.com>,
        John Ogness <john.ogness@...utronix.de>,
        Mike Galbraith <efault@....de>,
        Peter Zijlstra <peterz@...radead.org>,
        Petr Mladek <pmladek@...e.com>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Sergey Senozhatsky <senozhatsky@...omium.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH v4 1/2] lib/vsprintf: Remove static_branch_likely() from
 __ptr_to_hashval().

On (22/09/27 12:49), Sebastian Andrzej Siewior wrote:
> Using static_branch_likely() to signal that ptr_key has been filled is a
> bit much given that it is not a fast path.
> 
> Replace static_branch_likely() with bool for condition and a memory
> barrier for ptr_key.
> 
> Suggested-by: Petr Mladek <pmladek@...e.com>
> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>

Reviewed-by: Sergey Senozhatsky <senozhatsky@...omium.org>