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From: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
To: Mike Turquette <mturquette@linaro.org>
Cc: Heiko Stuebner <heiko@sntech.de>,
	Tomasz Figa <tomasz.figa@gmail.com>,
	Sylwester Nawrocki <s.nawrocki@samsung.com>,
	Tero Kristo <t-kristo@ti.com>,
	linux-arm-kernel@lists.infradead.org,
	linux-rockchip@lists.infradead.org,
	linux-samsung-soc@vger.kernel.org, linux-omap@vger.kernel.org,
	kernel@pengutronix.de
Subject: Re: [PATCH] clk: don't use __initconst for non-const arrays
Date: Fri, 12 Sep 2014 00:04:45 +0200	[thread overview]
Message-ID: <20140911220445.GQ3755@pengutronix.de> (raw)
In-Reply-To: <1410469471-31027-1-git-send-email-u.kleine-koenig@pengutronix.de>

Hello,

On Thu, Sep 11, 2014 at 11:04:31PM +0200, Uwe Kleine-König wrote:
>  /* Mux parent lists. */
> -static const char *fin_pll_p[] __initconst = {
> +static const char *fin_pll_p[] __initdata = {
>  	"xxti",
>  	"xusbxti"
>  };
As discussed with Tomasz on irc: The sad thing here is that for this
array only 8 bytes are freed when .init.rodata is thrown away (that is
two pointers). The actual data---5 + 8 bytes + maybe aligning---isn't
freed though.

We wondered if there is a nice and easy way to throw away the
characters, too.

The only way I currently see is:

	const char xxti[] __initconst = "xxti";
	...

	static const char *fin_pll_p[] __initdata = {
		xxti,
		...
	};

but this definitively doesn't qualify as "nice and easy". Is there an
alternative?

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |

WARNING: multiple messages have this Message-ID (diff)
From: u.kleine-koenig@pengutronix.de (Uwe Kleine-König)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] clk: don't use __initconst for non-const arrays
Date: Fri, 12 Sep 2014 00:04:45 +0200	[thread overview]
Message-ID: <20140911220445.GQ3755@pengutronix.de> (raw)
In-Reply-To: <1410469471-31027-1-git-send-email-u.kleine-koenig@pengutronix.de>

Hello,

On Thu, Sep 11, 2014 at 11:04:31PM +0200, Uwe Kleine-K?nig wrote:
>  /* Mux parent lists. */
> -static const char *fin_pll_p[] __initconst = {
> +static const char *fin_pll_p[] __initdata = {
>  	"xxti",
>  	"xusbxti"
>  };
As discussed with Tomasz on irc: The sad thing here is that for this
array only 8 bytes are freed when .init.rodata is thrown away (that is
two pointers). The actual data---5 + 8 bytes + maybe aligning---isn't
freed though.

We wondered if there is a nice and easy way to throw away the
characters, too.

The only way I currently see is:

	const char xxti[] __initconst = "xxti";
	...

	static const char *fin_pll_p[] __initdata = {
		xxti,
		...
	};

but this definitively doesn't qualify as "nice and easy". Is there an
alternative?

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-K?nig            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |

  parent reply	other threads:[~2014-09-11 22:04 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-09-11 21:04 [PATCH] clk: don't use __initconst for non-const arrays Uwe Kleine-König
2014-09-11 21:04 ` Uwe Kleine-König
2014-09-11 21:48 ` Tomasz Figa
2014-09-11 21:48   ` Tomasz Figa
2014-09-11 22:04 ` Uwe Kleine-König [this message]
2014-09-11 22:04   ` Uwe Kleine-König
2014-09-12  7:42   ` Ard Biesheuvel
2014-09-12  7:42     ` Ard Biesheuvel
2014-09-12  7:59     ` Uwe Kleine-König
2014-09-12  7:59       ` Uwe Kleine-König
2015-02-18  9:59 Uwe Kleine-König
2015-03-25 10:41 ` Uwe Kleine-König
2015-04-13  0:20   ` Michael Turquette

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