From b5fd066153c40a70a29caa1ea7987723ab687763 Mon Sep 17 00:00:00 2001
From: Kent Overstreet <kent.overstreet@linux.dev>
Date: Tue, 16 Jan 2024 17:00:02 -0500
Subject: Move c_src dirs back to toplevel

We just wanted c sourcefiles out of the top level, not c source
directories.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
---
 include/linux/spinlock.h | 65 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 65 insertions(+)
 create mode 100644 include/linux/spinlock.h

(limited to 'include/linux/spinlock.h')

diff --git a/include/linux/spinlock.h b/include/linux/spinlock.h
new file mode 100644
index 00000000..6c4a623c
--- /dev/null
+++ b/include/linux/spinlock.h
@@ -0,0 +1,65 @@
+#ifndef __TOOLS_LINUX_SPINLOCK_H
+#define __TOOLS_LINUX_SPINLOCK_H
+
+#include <linux/atomic.h>
+#include <pthread.h>
+
+typedef struct {
+	pthread_mutex_t lock;
+} raw_spinlock_t;
+
+#define __RAW_SPIN_LOCK_UNLOCKED(name)	(raw_spinlock_t) { .lock = PTHREAD_MUTEX_INITIALIZER  }
+
+static inline void raw_spin_lock_init(raw_spinlock_t *lock)
+{
+	pthread_mutex_init(&lock->lock, NULL);
+}
+
+static inline bool raw_spin_trylock(raw_spinlock_t *lock)
+{
+	return !pthread_mutex_trylock(&lock->lock);
+}
+
+static inline void raw_spin_lock(raw_spinlock_t *lock)
+{
+	pthread_mutex_lock(&lock->lock);
+}
+
+static inline void raw_spin_unlock(raw_spinlock_t *lock)
+{
+	pthread_mutex_unlock(&lock->lock);
+}
+
+#define raw_spin_lock_irq(lock)		raw_spin_lock(lock)
+#define raw_spin_unlock_irq(lock)	raw_spin_unlock(lock)
+
+#define raw_spin_lock_irqsave(lock, flags)		\
+do {							\
+	flags = 0;					\
+	raw_spin_lock(lock);				\
+} while (0)
+
+#define raw_spin_unlock_irqrestore(lock, flags) raw_spin_unlock(lock)
+
+typedef raw_spinlock_t spinlock_t;
+
+#define __SPIN_LOCK_UNLOCKED(name)	__RAW_SPIN_LOCK_UNLOCKED(name)
+
+#define DEFINE_SPINLOCK(x)	spinlock_t x = __SPIN_LOCK_UNLOCKED(x)
+
+#define spin_lock_init(lock)		raw_spin_lock_init(lock)
+#define spin_lock(lock)			raw_spin_lock(lock)
+#define spin_unlock(lock)		raw_spin_unlock(lock)
+
+#define spin_lock_nested(lock, n)	spin_lock(lock)
+
+#define spin_lock_bh(lock)		raw_spin_lock(lock)
+#define spin_unlock_bh(lock)		raw_spin_unlock(lock)
+
+#define spin_lock_irq(lock)		raw_spin_lock(lock)
+#define spin_unlock_irq(lock)		raw_spin_unlock(lock)
+
+#define spin_lock_irqsave(lock, flags)	raw_spin_lock_irqsave(lock, flags)
+#define spin_unlock_irqrestore(lock, flags) raw_spin_unlock_irqrestore(lock, flags)
+
+#endif /* __TOOLS_LINUX_SPINLOCK_H */
-- 
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