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Message-ID: <ZTY9CvT0B1a1M+Tk@gmail.com>
Date: Mon, 23 Oct 2023 11:29:46 +0200
From: Ingo Molnar <mingo@...nel.org>
To: Uros Bizjak <ubizjak@...il.com>
Cc: x86@...nel.org, linux-kernel@...r.kernel.org,
Andy Lutomirski <luto@...nel.org>,
Brian Gerst <brgerst@...il.com>,
Denys Vlasenko <dvlasenk@...hat.com>,
"H . Peter Anvin" <hpa@...or.com>,
Linus Torvalds <torvalds@...ux-foundation.org>,
Peter Zijlstra <peterz@...radead.org>,
Thomas Gleixner <tglx@...utronix.de>,
Josh Poimboeuf <jpoimboe@...hat.com>,
Nadav Amit <namit@...are.com>
Subject: Re: [PATCH -tip v2] x86/percpu: Introduce const-qualified
const_pcpu_hot
* Uros Bizjak <ubizjak@...il.com> wrote:
> DECLARE_PER_CPU_ALIGNED(struct pcpu_hot, pcpu_hot);
>
> +/* const-qualified alias to pcpu_hot, aliased by linker. */
> +DECLARE_PER_CPU_ALIGNED(const struct pcpu_hot __percpu_seg_override,
> + const_pcpu_hot);
I added the fix below - just like pcpu_hot, const_pcpu_hot needs to be
exported too, as it's (indirectly) used by various kernel modules.
Thanks,
Ingo
---
arch/x86/kernel/cpu/common.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 382d4e6b848d..4cc0ab0dfbb5 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -2051,6 +2051,7 @@ DEFINE_PER_CPU_ALIGNED(struct pcpu_hot, pcpu_hot) = {
.top_of_stack = TOP_OF_INIT_STACK,
};
EXPORT_PER_CPU_SYMBOL(pcpu_hot);
+EXPORT_PER_CPU_SYMBOL(const_pcpu_hot);
#ifdef CONFIG_X86_64
DEFINE_PER_CPU_FIRST(struct fixed_percpu_data,
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