From 4604c052b84d66407f5e68045a1939685eac401e Mon Sep 17 00:00:00 2001 From: Uros Bizjak Date: Thu, 30 Nov 2023 17:27:35 +0100 Subject: [PATCH] x86/percpu: Declare const_pcpu_hot as extern const variable const_pcpu_hot is aliased by linker to pcpu_hot, so there is no need to use the DECLARE_PER_CPU_ALIGNED() macro. Also, declare const_pcpu_hot as extern to avoid allocating storage space for the aliased structure. Fixes: ed2f752e0e0a ("x86/percpu: Introduce const-qualified const_pcpu_hot to micro-optimize code generation") Reported-by: kernel test robot Signed-off-by: Uros Bizjak Signed-off-by: Ingo Molnar Link: https://lore.kernel.org/r/20231130162949.83518-1-ubizjak@gmail.com Closes: https://lore.kernel.org/oe-kbuild-all/202311302257.tSFtZnly-lkp@intel.com/ --- arch/x86/include/asm/current.h | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/arch/x86/include/asm/current.h b/arch/x86/include/asm/current.h index 0538d24366733..9fbd7cb2dc866 100644 --- a/arch/x86/include/asm/current.h +++ b/arch/x86/include/asm/current.h @@ -37,8 +37,7 @@ static_assert(sizeof(struct pcpu_hot) == 64); 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); +extern const struct pcpu_hot __percpu_seg_override const_pcpu_hot; static __always_inline struct task_struct *get_current(void) { -- 2.30.2