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From: Maxime Ripard <maxime.ripard@free-electrons.com>
To: Sascha Hauer <s.hauer@pengutronix.de>
Cc: barebox@lists.infradead.org
Subject: Re: [PATCH] Add warning above get_ram_size
Date: Thu, 14 Feb 2013 10:40:38 +0100	[thread overview]
Message-ID: <511CB116.8050705@free-electrons.com> (raw)
In-Reply-To: <1360775819-5411-1-git-send-email-s.hauer@pengutronix.de>

Hi Sascha,

Le 13/02/2013 18:16, Sascha Hauer a écrit :
> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
> ---
>  common/memsize.c |    3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/common/memsize.c b/common/memsize.c
> index d149e41..ef6381b 100644
> --- a/common/memsize.c
> +++ b/common/memsize.c
> @@ -33,6 +33,9 @@
>   * Check memory range for valid RAM. A simple memory test determines
>   * the actually available RAM size between addresses `base' and
>   * `base + maxsize'.
> + *
> + * This function modifies the RAM. Do not use it if you're running from
> + * the RAM you are going to detect!
>   */

Actually, I don't see how it modifies the RAM, at least permanently. The
values it erase are backed up, and there's no concurrency at barebox
level, so we are sure that the value saved will still be the one that
would need to be backed up at the end of the function, right?

Maxime

-- 
Maxime Ripard, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com

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  reply	other threads:[~2013-02-14  9:40 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-02-13 16:50 [PATCH] cfa10036: Retrieve the RAM size at runtime Maxime Ripard
2013-02-13 17:09 ` Jean-Christophe PLAGNIOL-VILLARD
2013-02-14  9:42   ` Maxime Ripard
2013-02-13 17:16 ` [PATCH] Add warning above get_ram_size Sascha Hauer
2013-02-14  9:40   ` Maxime Ripard [this message]
2013-02-14 11:35     ` Sascha Hauer
2013-02-14 13:59       ` Maxime Ripard
2013-02-14 19:13         ` Sascha Hauer
2013-02-16  8:45           ` Re[2]: " Alexander Shiyan
2013-02-16 15:53             ` Jean-Christophe PLAGNIOL-VILLARD

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