kernel_5.10 no rt

hc

2023-12-11 6778948f9de86c3cfaf36725a7c87dcff9ba247f

 kernel/include/linux/irq_work.h
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@@ -2,7 +2,7 @@
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 #ifndef _LINUX_IRQ_WORK_H
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 #define _LINUX_IRQ_WORK_H
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-#include <linux/llist.h>
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+#include <linux/smp_types.h>
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 /*
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  * An entry can be in one of four states:
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@@ -13,28 +13,29 @@
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  * busy      NULL, 2 -> {free, claimed} : callback in progress, can be claimed
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  */
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-#define IRQ_WORK_PENDING	BIT(0)
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-#define IRQ_WORK_BUSY		BIT(1)
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-
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-/* Doesn't want IPI, wait for tick: */
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-#define IRQ_WORK_LAZY		BIT(2)
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-
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-#define IRQ_WORK_CLAIMED	(IRQ_WORK_PENDING | IRQ_WORK_BUSY)
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-
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 struct irq_work {
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-	unsigned long flags;
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-	struct llist_node llnode;
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+	union {
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+		struct __call_single_node node;
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+		struct {
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+			struct llist_node llnode;
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+			atomic_t flags;
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+		};
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+	};
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 	void (*func)(struct irq_work *);
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 };
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 static inline
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 void init_irq_work(struct irq_work *work, void (*func)(struct irq_work *))
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 {
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-	work->flags = 0;
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+	atomic_set(&work->flags, 0);
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 	work->func = func;
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 }
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-#define DEFINE_IRQ_WORK(name, _f) struct irq_work name = { .func = (_f), }
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+#define DEFINE_IRQ_WORK(name, _f) struct irq_work name = {	\
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+		.flags = ATOMIC_INIT(0),			\
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+		.func  = (_f)					\
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+}
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+
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 bool irq_work_queue(struct irq_work *work);
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 bool irq_work_queue_on(struct irq_work *work, int cpu);
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@@ -47,9 +48,11 @@
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 void irq_work_run(void);
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 bool irq_work_needs_cpu(void);
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+void irq_work_single(void *arg);
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 #else
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 static inline bool irq_work_needs_cpu(void) { return false; }
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 static inline void irq_work_run(void) { }
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+static inline void irq_work_single(void *arg) { }
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 #endif
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 #endif /* _LINUX_IRQ_WORK_H */