From: Brian Gerst <brgerst@gmail.com>
To: linux-kernel@vger.kernel.org, x86@kernel.org
Cc: Ingo Molnar <mingo@kernel.org>, "H . Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
Borislav Petkov <bp@alien8.de>, Ard Biesheuvel <ardb@kernel.org>,
Uros Bizjak <ubizjak@gmail.com>,
Linus Torvalds <torvalds@linuxfoundation.org>,
Andy Lutomirski <luto@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Andrew Morton <akpm@linux-foundation.org>,
Brian Gerst <brgerst@gmail.com>
Subject: [PATCH v2 10/11] x86/stackprotector: Move __stack_chk_guard to percpu hot section
Date: Wed, 26 Feb 2025 13:05:29 -0500 [thread overview]
Message-ID: <20250226180531.1242429-11-brgerst@gmail.com> (raw)
In-Reply-To: <20250226180531.1242429-1-brgerst@gmail.com>
No functional change.
Signed-off-by: Brian Gerst <brgerst@gmail.com>
---
arch/x86/include/asm/stackprotector.h | 2 +-
arch/x86/kernel/cpu/common.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/x86/include/asm/stackprotector.h b/arch/x86/include/asm/stackprotector.h
index d43fb589fcf6..cd761b14eb02 100644
--- a/arch/x86/include/asm/stackprotector.h
+++ b/arch/x86/include/asm/stackprotector.h
@@ -20,7 +20,7 @@
#include <linux/sched.h>
-DECLARE_PER_CPU(unsigned long, __stack_chk_guard);
+DECLARE_PER_CPU_CACHE_HOT(unsigned long, __stack_chk_guard);
/*
* Initialize the stackprotector canary value.
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index ac8721a0eb3a..62472b8f798a 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -2097,7 +2097,7 @@ void syscall_init(void)
#endif /* CONFIG_X86_64 */
#ifdef CONFIG_STACKPROTECTOR
-DEFINE_PER_CPU(unsigned long, __stack_chk_guard);
+DEFINE_PER_CPU_CACHE_HOT(unsigned long, __stack_chk_guard);
#ifndef CONFIG_SMP
EXPORT_PER_CPU_SYMBOL(__stack_chk_guard);
#endif
--
2.48.1
next prev parent reply other threads:[~2025-02-26 18:06 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-26 18:05 [PATCH v2 00/11] Add a percpu subsection for cache hot data Brian Gerst
2025-02-26 18:05 ` [PATCH v2 01/11] percpu: Introduce percpu hot section Brian Gerst
2025-02-26 19:36 ` Uros Bizjak
2025-02-27 2:09 ` Brian Gerst
2025-02-27 14:16 ` kernel test robot
2025-02-27 19:29 ` kernel test robot
2025-02-26 18:05 ` [PATCH v2 02/11] x86/percpu: Move pcpu_hot to " Brian Gerst
2025-02-26 18:05 ` [PATCH v2 03/11] x86/preempt: Move preempt count " Brian Gerst
2025-02-26 18:05 ` [PATCH v2 04/11] x86/smp: Move cpu number " Brian Gerst
2025-02-26 18:05 ` [PATCH v2 05/11] x86/retbleed: Move call depth " Brian Gerst
2025-02-26 18:05 ` [PATCH v2 06/11] x86/softirq: Move softirq_pending " Brian Gerst
2025-02-26 18:05 ` [PATCH v2 07/11] x86/irq: Move irq stacks " Brian Gerst
2025-02-26 20:25 ` Peter Zijlstra
2025-02-27 0:10 ` Brian Gerst
2025-02-26 18:05 ` [PATCH v2 08/11] x86/percpu: Move top_of_stack " Brian Gerst
2025-02-26 20:08 ` Uros Bizjak
2025-02-27 2:10 ` Brian Gerst
2025-02-26 18:05 ` [PATCH v2 09/11] x86/percpu: Move current_task " Brian Gerst
2025-02-26 18:05 ` Brian Gerst [this message]
2025-02-26 18:05 ` [PATCH v2 11/11] x86/smp: Move this_cpu_off " Brian Gerst
2025-02-26 20:23 ` [PATCH v2 00/11] Add a percpu subsection for cache hot data Peter Zijlstra
2025-02-27 1:29 ` Brian Gerst
2025-02-27 1:52 ` Brian Gerst
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