linux-kernel - Re: [PATCH] LoongArch: Fix build errors for CONFIG

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Message-ID: <CAAhV-H5m=oowvFLwbZKMDvWp3qPKCmKp5uoS4WU1XsAWzwWMmQ@mail.gmail.com>
Date: Wed, 26 Nov 2025 15:09:16 +0800
From: Huacai Chen <chenhuacai@...nel.org>
To: Jiaxun Yang <jiaxun.yang@...goat.com>
Cc: Huacai Chen <chenhuacai@...ngson.cn>, loongarch@...ts.linux.dev, 
	Xuefeng Li <lixuefeng@...ngson.cn>, Guo Ren <guoren@...nel.org>, 
	Xuerui Wang <kernel@...0n.name>, linux-kernel@...r.kernel.org, 
	"stable@...r.kernel.org" <stable@...r.kernel.org>, kernel test robot <lkp@...el.com>, Rui Wang <wangrui@...ngson.cn>
Subject: Re: [PATCH] LoongArch: Fix build errors for CONFIG_RANDSTRUCT

On Tue, Nov 25, 2025 at 9:49 PM Jiaxun Yang <jiaxun.yang@...goat.com> wrote:
>
>
>
> On Tue, 25 Nov 2025, at 4:25 PM, Huacai Chen wrote:
> > When CONFIG_RANDSTRUCT enabled, members of task_struct are randomized.
> > There is a chance that TASK_STACK_CANARY be out of 12bit immediate's
> > range and causes build errors. TASK_STACK_CANARY is naturally aligned,
> > so fix it by replacing ld.d/st.d with ldptr.d/stptr.d which have 14bit
> > immediates.
>
> Hi Huacai,
>
> What about 32bit build in this case?
Use the same solution as other registers, please see:
https://lore.kernel.org/loongarch/20251122043634.3447854-7-chenhuacai@loongson.cn/T/#u

Huacai

>
> Thanks
> Jiaxun
>
> >