Date:   Mon, 6 Mar 2023 11:06:05 +0000
From:   "Russell King (Oracle)" <linux@armlinux.org.uk>
To:     Jungseung Lee <js07.lee@samsung.com>
Cc:     linus.walleij@linaro.org, amit.kachhap@arm.com, ardb@kernel.org,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        keescook@chromium.org, js07.lee@gmail.com
Subject: Re: [PATCH 1/2] arm/mm : omit [_text, _stext) from kernel code region
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References: <CGME20230306061055epcas1p1f7718c46c10f84845e086f9ce9f9a41f@epcas1p1.samsung.com>
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Sender: Russell King (Oracle) <linux@armlinux.org.uk>
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On Mon, Mar 06, 2023 at 02:51:54PM +0900, Jungseung Lee wrote:
> The resource reservations in /proc/iomem made for the kernel code did
> not reflect the gaps between pagetable and text.
> 
> In particular, if the CONFIG_STRICT_KERNEL_RWX option is turned on,
> the wrong area is shown as the kernel code area.
> 
> Fix it by removing [_text, _stext) from kernel code region.
> 
> Before:
> 04000000-2f7fffff : System RAM
>   04008000-04cfffff : Kernel code
>   04e00000-05369a27 : Kernel data
> 
> After :
> 04000000-2f7fffff : System RAM
>   04100000-04cfffff : Kernel code
>   04e00000-05369a27 : Kernel data

And why do you think this is correct? Isn't the head text, which
isn't discarded and is located at 0x04008000, still part of kernel
code?

-- 
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