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Diffstat (limited to 'sys/compat/linuxkpi/common/include/linux/spinlock.h')
-rw-r--r--sys/compat/linuxkpi/common/include/linux/spinlock.h70
1 files changed, 70 insertions, 0 deletions
diff --git a/sys/compat/linuxkpi/common/include/linux/spinlock.h b/sys/compat/linuxkpi/common/include/linux/spinlock.h
new file mode 100644
index 000000000000..97c83e0ed034
--- /dev/null
+++ b/sys/compat/linuxkpi/common/include/linux/spinlock.h
@@ -0,0 +1,70 @@
+/*-
+ * Copyright (c) 2010 Isilon Systems, Inc.
+ * Copyright (c) 2010 iX Systems, Inc.
+ * Copyright (c) 2010 Panasas, Inc.
+ * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice unmodified, this list of conditions, and the following
+ * disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+#ifndef _LINUX_SPINLOCK_H_
+#define _LINUX_SPINLOCK_H_
+
+#include <sys/param.h>
+#include <sys/kernel.h>
+#include <sys/lock.h>
+#include <sys/mutex.h>
+
+#include <linux/compiler.h>
+#include <linux/kernel.h>
+#include <linux/rwlock.h>
+
+typedef struct {
+ struct mtx m;
+} spinlock_t;
+
+#define spin_lock(_l) mtx_lock(&(_l)->m)
+#define spin_unlock(_l) mtx_unlock(&(_l)->m)
+#define spin_trylock(_l) mtx_trylock(&(_l)->m)
+#define spin_lock_nested(_l, _n) mtx_lock_flags(&(_l)->m, MTX_DUPOK)
+#define spin_lock_irq(lock) spin_lock(lock)
+#define spin_unlock_irq(lock) spin_unlock(lock)
+#define spin_lock_irqsave(lock, flags) \
+ do {(flags) = 0; spin_lock(lock); } while (0)
+#define spin_unlock_irqrestore(lock, flags) \
+ do { spin_unlock(lock); } while (0)
+
+static inline void
+spin_lock_init(spinlock_t *lock)
+{
+
+ memset(&lock->m, 0, sizeof(lock->m));
+ mtx_init(&lock->m, "lnxspin", NULL, MTX_DEF | MTX_NOWITNESS);
+}
+
+#define DEFINE_SPINLOCK(lock) \
+ spinlock_t lock; \
+ MTX_SYSINIT(lock, &(lock).m, "lnxspin", MTX_DEF)
+
+#endif /* _LINUX_SPINLOCK_H_ */