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Message-ID: <87bkfsnja3.ffs@tglx>
Date: Mon, 31 Jul 2023 18:21:56 +0200
From: Thomas Gleixner <tglx@...utronix.de>
To: Peter Zijlstra <peterz@...radead.org>, axboe@...nel.dk
Cc: linux-kernel@...r.kernel.org, peterz@...radead.org,
mingo@...hat.com, dvhart@...radead.org, dave@...olabs.net,
andrealmeid@...lia.com, Andrew Morton <akpm@...ux-foundation.org>,
urezki@...il.com, hch@...radead.org, lstoakes@...il.com,
Arnd Bergmann <arnd@...db.de>, linux-api@...r.kernel.org,
linux-mm@...ck.org, linux-arch@...r.kernel.org,
malteskarupke@....de
Subject: Re: [PATCH v1 03/14] futex: Flag conversion
On Fri, Jul 21 2023 at 12:22, Peter Zijlstra wrote:
> +
> +static inline bool futex_flags_valid(unsigned int flags)
> +{
> + /* Only 64bit futexes for 64bit code */
> + if (!IS_ENABLED(CONFIG_64BIT) || in_compat_syscall()) {
> + if ((flags & FLAGS_SIZE_MASK) == FLAGS_SIZE_64)
> + return false;
> + }
> +
> + /* Only 32bit futexes are implemented -- for now */
> + if ((flags & FLAGS_SIZE_MASK) != FLAGS_SIZE_32)
> + return false;
> +
> + return true;
> +}
> +
> +static inline unsigned int futex_size(unsigned int flags)
> +{
> + unsigned int size = flags & FLAGS_SIZE_MASK;
> + return 1 << size; /* {0,1,2,3} -> {1,2,4,8} */
Lacks a new line and the comment is both misplaced and kinda obvious, no?
Other than that, this looks abour right.
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