linux-kernel - Re: [PATCH RESEND] random: use correct memory barriers for crng_node

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Message-ID: <CAHmME9p_TwQntnDu8y0RkxweVMe=4OmNyxcDcEvc-6tAkYDRGw@mail.gmail.com>
Date:   Mon, 20 Dec 2021 16:17:59 +0100
From:   "Jason A. Donenfeld" <Jason@...c4.com>
To:     Eric Biggers <ebiggers@...nel.org>
Cc:     "Theodore Ts'o" <tytso@....edu>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux Crypto Mailing List <linux-crypto@...r.kernel.org>,
        "Paul E . McKenney" <paulmck@...nel.org>,
        stable <stable@...r.kernel.org>
Subject: Re: [PATCH RESEND] random: use correct memory barriers for crng_node_pool

On Sun, Dec 19, 2021 at 3:52 AM Eric Biggers <ebiggers@...nel.org> wrote:
> +
> +static inline struct crng_state *select_crng(void)
> +{
> +
> +static inline struct crng_state *select_crng(void)
> +{

Usually static inline is avoided in .c files. Any special reason why
we'd need this especially much here? Those functions are pretty small
and I assume will be inlined anyway on most architectures.

I just did a test on x86_64 with GCC 11, and the same file was
produced with 'static' as with 'static inline'. Was there an
arch/config/compiler combo you were concerned about here?

Jason