linux-kernel - [PATCH v2 11/11] x86/smp: Move this_cpu

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Message-ID: <20250226180531.1242429-12-brgerst@gmail.com>
Date: Wed, 26 Feb 2025 13:05:30 -0500
From: Brian Gerst <brgerst@...il.com>
To: linux-kernel@...r.kernel.org,
	x86@...nel.org
Cc: Ingo Molnar <mingo@...nel.org>,
	"H . Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Borislav Petkov <bp@...en8.de>,
	Ard Biesheuvel <ardb@...nel.org>,
	Uros Bizjak <ubizjak@...il.com>,
	Linus Torvalds <torvalds@...uxfoundation.org>,
	Andy Lutomirski <luto@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Brian Gerst <brgerst@...il.com>
Subject: [PATCH v2 11/11] x86/smp: Move this_cpu_off to percpu hot section

No functional change.

Signed-off-by: Brian Gerst <brgerst@...il.com>
---
 arch/x86/include/asm/percpu.h  | 2 +-
 arch/x86/kernel/setup_percpu.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/include/asm/percpu.h b/arch/x86/include/asm/percpu.h
index e347c6656ce8..f29c85a0abf4 100644
--- a/arch/x86/include/asm/percpu.h
+++ b/arch/x86/include/asm/percpu.h
@@ -589,7 +589,7 @@ do {									\
 #include <asm-generic/percpu.h>
 
 /* We can use this directly for local CPU (faster). */
-DECLARE_PER_CPU_READ_MOSTLY(unsigned long, this_cpu_off);
+DECLARE_PER_CPU_CACHE_HOT(unsigned long, this_cpu_off);
 
 #endif /* !__ASSEMBLY__ */
 
diff --git a/arch/x86/kernel/setup_percpu.c b/arch/x86/kernel/setup_percpu.c
index 175afc3ffb12..bfa48e7a32a2 100644
--- a/arch/x86/kernel/setup_percpu.c
+++ b/arch/x86/kernel/setup_percpu.c
@@ -26,7 +26,7 @@
 DEFINE_PER_CPU_CACHE_HOT(int, cpu_number);
 EXPORT_PER_CPU_SYMBOL(cpu_number);
 
-DEFINE_PER_CPU_READ_MOSTLY(unsigned long, this_cpu_off);
+DEFINE_PER_CPU_CACHE_HOT(unsigned long, this_cpu_off);
 EXPORT_PER_CPU_SYMBOL(this_cpu_off);
 
 unsigned long __per_cpu_offset[NR_CPUS] __ro_after_init;
-- 
2.48.1