From d1c3cfd79da148755ef0fa51f65cd8d0d64b9a88 Mon Sep 17 00:00:00 2001
From: Emmanuel Vadot <manu@FreeBSD.org>
Date: Tue, 2 Aug 2022 09:33:47 +0200
Subject: [PATCH] linuxkpi: Add trylock_page and unlock_page

Simple wrapper around vm_page_trylock and vm_page_unlock.

Reviewed by:	hselasky
Sponsored by:	Beckhoff Automation GmbH & Co. KG
Differential Revision:	https://reviews.freebsd.org/D36019
---
 sys/compat/linuxkpi/common/include/linux/mm.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/sys/compat/linuxkpi/common/include/linux/mm.h b/sys/compat/linuxkpi/common/include/linux/mm.h
index 5a16cf0d0a5..a266b591362 100644
--- a/sys/compat/linuxkpi/common/include/linux/mm.h
+++ b/sys/compat/linuxkpi/common/include/linux/mm.h
@@ -288,6 +288,19 @@ vmalloc_to_page(const void *addr)
 	return (PHYS_TO_VM_PAGE(paddr));
 }
 
+static inline int
+trylock_page(struct page *page)
+{
+	return (vm_page_trylock(page));
+}
+
+static inline void
+unlock_page(struct page *page)
+{
+
+	vm_page_unlock(page);
+}
+
 extern int is_vmalloc_addr(const void *addr);
 void si_meminfo(struct sysinfo *si);