diff mbox series

[Concept,09/11] ext4l: Extract kthread declarations into their own file

Message ID 20251216211817.4131167-10-sjg@u-boot.org
State New
Headers
Series ext4l: Add Linux compatibility headers |

Commit Message

Simon Glass Dec. 16, 2025, 9:18 p.m. UTC 
  From: Simon Glass <simon.glass@canonical.com>

Create include/linux/kthread.h with stub definitions for kernel thread
support. U-Boot doesn't have multi-threading.

Includes:
- kthread_create(), kthread_run(), kthread_stop()
- kthread_should_stop(), kthread_should_park()
- wake_up_process(), set_current_state()
- task_pid_nr()

Update compat.h to include kthread.h and remove duplicate definitions.

Co-developed-by: Claude Opus 4.5 <noreply@anthropic.com>
Signed-off-by: Simon Glass <simon.glass@canonical.com>
---

 include/linux/compat.h  |  7 +------
 include/linux/kthread.h | 28 ++++++++++++++++++++++++++++
 2 files changed, 29 insertions(+), 6 deletions(-)
 create mode 100644 include/linux/kthread.h
diff mbox series

Patch

diff --git a/include/linux/compat.h b/include/linux/compat.h
index fc0bfc31e5f..e9db2120de6 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -15,6 +15,7 @@ 
 #include <linux/freezer.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
+#include <linux/kthread.h>
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/uaccess.h>
@@ -160,9 +161,6 @@  typedef unsigned long blkcnt_t;
 #define wake_up_interruptible(...)	do { } while (0)
 #define dump_stack(...)			do { } while (0)
 
-#define task_pid_nr(x)			0
-#define set_current_state(...)		do { } while (0)
-#define kthread_should_stop(...)	0
 
 #define setup_timer(timer, func, data) do {} while (0)
 #define del_timer_sync(timer) do {} while (0)
@@ -197,9 +195,6 @@  typedef int	wait_queue_head_t;
 #define yield()				do { } while (0)
 
 
-#define kthread_create(...)	__builtin_return_address(0)
-#define kthread_stop(...)	do { } while (0)
-#define wake_up_process(...)	do { } while (0)
 
 struct rw_semaphore { int i; };
 #define down_write(...)			do { } while (0)
diff --git a/include/linux/kthread.h b/include/linux/kthread.h
new file mode 100644
index 00000000000..ba35274e9a4
--- /dev/null
+++ b/include/linux/kthread.h
@@ -0,0 +1,28 @@ 
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Simple interface for creating and stopping kernel threads without mess.
+ *
+ * Stub definitions for Linux kernel thread support.
+ * U-Boot doesn't have multi-threading.
+ */
+#ifndef _LINUX_KTHREAD_H
+#define _LINUX_KTHREAD_H
+
+struct task_struct;
+
+#define kthread_create(fn, data, fmt, ...)	\
+	((struct task_struct *)__builtin_return_address(0))
+#define kthread_run(fn, data, fmt, ...)		\
+	((struct task_struct *)__builtin_return_address(0))
+#define kthread_stop(task)		do { } while (0)
+#define kthread_should_stop()		0
+#define kthread_should_park()		0
+#define kthread_park(task)		0
+#define kthread_unpark(task)		do { } while (0)
+#define kthread_parkme()		do { } while (0)
+
+#define wake_up_process(task)		do { } while (0)
+#define set_current_state(state)	do { } while (0)
+
+#define task_pid_nr(task)		0
+
+#endif /* _LINUX_KTHREAD_H */