linux-kernel - [tip: x86/core] x86/softirq: Move softirq

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Message-ID: <174107686744.14745.578494210267739469.tip-bot2@tip-bot2>
Date: Tue, 04 Mar 2025 08:27:47 -0000
From: "tip-bot2 for Brian Gerst" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Brian Gerst <brgerst@...il.com>, Ingo Molnar <mingo@...nel.org>,
 Uros Bizjak <ubizjak@...il.com>,
 Linus Torvalds <torvalds@...ux-foundation.org>,
 Peter Zijlstra <peterz@...radead.org>, x86@...nel.org,
 linux-kernel@...r.kernel.org
Subject:
 [tip: x86/core] x86/softirq: Move softirq_pending to percpu hot section

The following commit has been merged into the x86/core branch of tip:

Commit-ID:     d24ec21858c6cd17c7a46222d92b06644f69b12e
Gitweb:        https://git.kernel.org/tip/d24ec21858c6cd17c7a46222d92b06644f69b12e
Author:        Brian Gerst <brgerst@...il.com>
AuthorDate:    Mon, 03 Mar 2025 11:52:41 -05:00
Committer:     Ingo Molnar <mingo@...nel.org>
CommitterDate: Mon, 03 Mar 2025 21:37:41 +01:00

x86/softirq: Move softirq_pending to percpu hot section

No functional change.

Signed-off-by: Brian Gerst <brgerst@...il.com>
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Acked-by: Uros Bizjak <ubizjak@...il.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Link: https://lore.kernel.org/r/20250303165246.2175811-7-brgerst@gmail.com
---
 arch/x86/include/asm/current.h | 1 -
 arch/x86/include/asm/hardirq.h | 4 ++--
 arch/x86/kernel/irq.c          | 3 +++
 3 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/arch/x86/include/asm/current.h b/arch/x86/include/asm/current.h
index 8ba2c0f..f153c77 100644
--- a/arch/x86/include/asm/current.h
+++ b/arch/x86/include/asm/current.h
@@ -16,7 +16,6 @@ struct pcpu_hot {
 	struct task_struct	*current_task;
 	unsigned long		top_of_stack;
 	void			*hardirq_stack_ptr;
-	u16			softirq_pending;
 #ifdef CONFIG_X86_64
 	bool			hardirq_stack_inuse;
 #else
diff --git a/arch/x86/include/asm/hardirq.h b/arch/x86/include/asm/hardirq.h
index 6ffa8b7..f00c09f 100644
--- a/arch/x86/include/asm/hardirq.h
+++ b/arch/x86/include/asm/hardirq.h
@@ -3,7 +3,6 @@
 #define _ASM_X86_HARDIRQ_H
 
 #include <linux/threads.h>
-#include <asm/current.h>
 
 typedef struct {
 #if IS_ENABLED(CONFIG_KVM_INTEL)
@@ -66,7 +65,8 @@ extern u64 arch_irq_stat_cpu(unsigned int cpu);
 extern u64 arch_irq_stat(void);
 #define arch_irq_stat		arch_irq_stat
 
-#define local_softirq_pending_ref       pcpu_hot.softirq_pending
+DECLARE_PER_CPU_CACHE_HOT(u16, __softirq_pending);
+#define local_softirq_pending_ref       __softirq_pending
 
 #if IS_ENABLED(CONFIG_KVM_INTEL)
 /*
diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
index feca4f2..83a5252 100644
--- a/arch/x86/kernel/irq.c
+++ b/arch/x86/kernel/irq.c
@@ -33,6 +33,9 @@
 DEFINE_PER_CPU_SHARED_ALIGNED(irq_cpustat_t, irq_stat);
 EXPORT_PER_CPU_SYMBOL(irq_stat);
 
+DEFINE_PER_CPU_CACHE_HOT(u16, __softirq_pending);
+EXPORT_PER_CPU_SYMBOL(__softirq_pending);
+
 atomic_t irq_err_count;
 
 /*