aboutsummaryrefslogtreecommitdiff
path: root/sys/compat/linuxkpi/common/include/linux/rwlock.h
diff options
context:
space:
mode:
Diffstat (limited to 'sys/compat/linuxkpi/common/include/linux/rwlock.h')
-rw-r--r--sys/compat/linuxkpi/common/include/linux/rwlock.h66
1 files changed, 66 insertions, 0 deletions
diff --git a/sys/compat/linuxkpi/common/include/linux/rwlock.h b/sys/compat/linuxkpi/common/include/linux/rwlock.h
new file mode 100644
index 000000000000..e7c6301f9587
--- /dev/null
+++ b/sys/compat/linuxkpi/common/include/linux/rwlock.h
@@ -0,0 +1,66 @@
+/*-
+ * 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_RWLOCK_H_
+#define _LINUX_RWLOCK_H_
+
+#include <sys/lock.h>
+#include <sys/rwlock.h>
+
+typedef struct {
+ struct rwlock rw;
+} rwlock_t;
+
+#define read_lock(_l) rw_rlock(&(_l)->rw)
+#define write_lock(_l) rw_wlock(&(_l)->rw)
+#define read_unlock(_l) rw_runlock(&(_l)->rw)
+#define write_unlock(_l) rw_wunlock(&(_l)->rw)
+#define read_lock_irq(lock) read_lock((lock))
+#define read_unlock_irq(lock) read_unlock((lock))
+#define write_lock_irq(lock) write_lock((lock))
+#define write_unlock_irq(lock) write_unlock((lock))
+#define read_lock_irqsave(lock, flags) \
+ do {(flags) = 0; read_lock(lock); } while (0)
+#define write_lock_irqsave(lock, flags) \
+ do {(flags) = 0; write_lock(lock); } while (0)
+#define read_unlock_irqrestore(lock, flags) \
+ do { read_unlock(lock); } while (0)
+#define write_unlock_irqrestore(lock, flags) \
+ do { write_unlock(lock); } while (0)
+
+static inline void
+rwlock_init(rwlock_t *lock)
+{
+
+ memset(&lock->rw, 0, sizeof(lock->rw));
+ rw_init_flags(&lock->rw, "lnxrw", RW_NOWITNESS);
+}
+
+#endif /* _LINUX_RWLOCK_H_ */