1 files changed, 54 insertions, 0 deletions

diff --git a/sys/compat/linuxkpi/common/include/linux/eventfd.h b/sys/compat/linuxkpi/common/include/linux/eventfd.h
new file mode 100644
index 000000000000..d167d4b7d189
--- /dev/null
+++ b/sys/compat/linuxkpi/common/include/linux/eventfd.h
@@ -0,0 +1,54 @@
+/*-
+ * Copyright (c) 2025 The FreeBSD Foundation
+ * Copyright (c) 2025 Jean-Sébastien Pédron
+ *
+ * This software was developed by Jean-Sébastien Pédron under sponsorship
+ * from the FreeBSD Foundation.
+ *
+ * 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, 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
+ */
+
+#ifndef	_LINUXKPI_LINUX_EVENTFD_H_
+#define	_LINUXKPI_LINUX_EVENTFD_H_
+
+#include <sys/eventfd.h>
+
+#include <linux/wait.h>
+#include <linux/err.h>
+#include <linux/percpu-defs.h>
+#include <linux/percpu.h>
+#include <linux/sched.h>
+
+/*
+ * Linux uses `struct eventfd_ctx`, but FreeBSD defines `struct eventfd`. Here,
+ * we define a synonym to the FreeBSD structure. This allows to keep Linux code
+ * unmodified.
+ */
+#define	eventfd_ctx eventfd
+
+#define	eventfd_ctx_fdget lkpi_eventfd_ctx_fdget
+struct eventfd_ctx *lkpi_eventfd_ctx_fdget(int fd);
+
+#define	eventfd_ctx_put lkpi_eventfd_ctx_put
+void lkpi_eventfd_ctx_put(struct eventfd_ctx *ctx);
+
+#endif /* _LINUXKPI_LINUX_EVENTFD_H_ */