[RFC PATCH v3 02/10] irq_work: Split type definition to its own header

[Valentin Schneider]

A later commit will add a struct irq_work member to struct task_struct, which
would require <linux/sched.h> to include the definition of struct
irq_work.

Thanks to header dependency hell, incudling <linux/irq_work.h> in <linux/sched.h>
results in defining inline helpers using not-yet-defined fields (mm_struct,
task_struct, various task states...).

Break off the definition of struct irq_work into its own header file.

Signed-off-by: Valentin Schneider <vschneid@xxxxxxxxxx>
---
 include/linux/irq_work.h       |  8 ++------
 include/linux/irq_work_types.h | 14 ++++++++++++++
 2 files changed, 16 insertions(+), 6 deletions(-)
 create mode 100644 include/linux/irq_work_types.h

diff --git a/include/linux/irq_work.h b/include/linux/irq_work.h
index 136f2980cba30..7f6d2af360d91 100644
--- a/include/linux/irq_work.h
+++ b/include/linux/irq_work.h
@@ -5,6 +5,8 @@
 #include <linux/smp_types.h>
 #include <linux/rcuwait.h>
 
+#include <linux/irq_work_types.h>
+
 /*
  * An entry can be in one of four states:
  *
@@ -14,12 +16,6 @@
  * busy      NULL, 2 -> {free, claimed} : callback in progress, can be claimed
  */
 
-struct irq_work {
-	struct __call_single_node node;
-	void (*func)(struct irq_work *);
-	struct rcuwait irqwait;
-};
-
 #define __IRQ_WORK_INIT(_func, _flags) (struct irq_work){	\
 	.node = { .u_flags = (_flags), },			\
 	.func = (_func),					\
diff --git a/include/linux/irq_work_types.h b/include/linux/irq_work_types.h
new file mode 100644
index 0000000000000..108cbc514733b
--- /dev/null
+++ b/include/linux/irq_work_types.h
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LINUX_IRQ_WORK_TYPES_H
+#define _LINUX_IRQ_WORK_TYPES_H
+
+#include <linux/smp_types.h>
+#include <linux/rcuwait_types.h>
+
+struct irq_work {
+	struct __call_single_node node;
+	void (*func)(struct irq_work *);
+	struct rcuwait irqwait;
+};
+
+#endif
-- 
2.43.0