x86/softirq: Move softirq pending next to current task

Another hot variable which is strict per CPU and benefits from
being in the same cache line.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220915111145.702133710@infradead.org

diff --git a/arch/x86/include/asm/current.h b/arch/x86/include/asm/current.h
index ac3090d..b89aba0 100644 (file)
--- a/arch/x86/include/asm/current.h
+++ b/arch/x86/include/asm/current.h
@@ -19,6 +19,7 @@ struct pcpu_hot {
                        int                     cpu_number;
                        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 275e7fd..66837b8 100644 (file)
--- a/arch/x86/include/asm/hardirq.h
+++ b/arch/x86/include/asm/hardirq.h
@@ -3,9 +3,9 @@
 #define _ASM_X86_HARDIRQ_H
 
 #include <linux/threads.h>
+#include <asm/current.h>
 
 typedef struct {
-       u16          __softirq_pending;
 #if IS_ENABLED(CONFIG_KVM_INTEL)
        u8           kvm_cpu_l1tf_flush_l1d;
 #endif
@@ -60,6 +60,7 @@ 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
 
 #if IS_ENABLED(CONFIG_KVM_INTEL)
 static inline void kvm_set_cpu_l1tf_flush_l1d(void)