linux-kernel - RE: [PATCH 1/3] arm64:add missing CONFIG_STRICT_KERNEL_RWX for mark_rodata

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Message-ID: <E490CD805F7529488761C40FD9D26EF12A672E03@dggemm507-mbx.china.huawei.com>
Date:   Wed, 30 May 2018 03:31:38 +0000
From:   Nixiaoming <nixiaoming@...wei.com>
To:     Will Deacon <will.deacon@....com>
CC:     "catalin.marinas@....com" <catalin.marinas@....com>,
        "ard.biesheuvel@...aro.org" <ard.biesheuvel@...aro.org>,
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Subject: RE: [PATCH 1/3] arm64:add missing CONFIG_STRICT_KERNEL_RWX for
 mark_rodata_ro

Unable to set CONFIG_STRICT_KERNEL_RWX=n by make menuconfig ARCH=arm64

When reading the code, I feel it is more appropriate to add macro control here.


-----Original Message-----
From: Will Deacon [mailto:will.deacon@....com] 
Sent: Tuesday, May 29, 2018 11:45 PM
To: Nixiaoming <nixiaoming@...wei.com>
Cc: catalin.marinas@....com; ard.biesheuvel@...aro.org; marc.zyngier@....com; james.morse@....com; kristina.martsenko@....com; steve.capper@....com; tglx@...utronix.de; mingo@...hat.com; hpa@...or.com; akpm@...ux-foundation.org; vbabka@...e.cz; mhocko@...e.com; dave.hansen@...ux.intel.com; dan.j.williams@...el.com; kirill.shutemov@...ux.intel.com; zhang.jia@...ux.alibaba.com; schwidefsky@...ibm.com; heiko.carstens@...ibm.com; gregkh@...uxfoundation.org; linux-kernel@...r.kernel.org; linux-arm-kernel@...ts.infradead.org; x86@...nel.org; linux-s390@...r.kernel.org
Subject: Re: [PATCH 1/3] arm64:add missing CONFIG_STRICT_KERNEL_RWX for mark_rodata_ro

On Tue, May 29, 2018 at 09:36:15PM +0800, nixiaoming wrote:
> mark_rodata_ro is only called by the function mark_readonly when
> CONFIG_STRICT_KERNEL_RWX=y,
> if CONFIG_STRICT_KERNEL_RWX is not set
> a compile warning may be triggered: unused function

How are you achieving this configuration? In our Kconfig we select this
unconditionally.

Will