From cb18d88060100ced29da1900f5a35e3deded0b36 Mon Sep 17 00:00:00 2001
From: Ryan Moeller <ryan@iXsystems.com>
Date: Sat, 25 Jul 2020 13:47:18 -0400
Subject: [PATCH] FreeBSD: Implement arc_free_memory

This is only used for the kstat, but something other than 0 is nice.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Ryan Moeller <ryan@iXsystems.com>
Closes #10626
---
 module/os/freebsd/zfs/arc_os.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/module/os/freebsd/zfs/arc_os.c b/module/os/freebsd/zfs/arc_os.c
index fc88e6e59..7415be919 100644
--- a/module/os/freebsd/zfs/arc_os.c
+++ b/module/os/freebsd/zfs/arc_os.c
@@ -192,7 +192,7 @@ arc_prune_async(int64_t adjust)
 uint64_t
 arc_all_memory(void)
 {
-	return ((uint64_t)ptob(physmem));
+	return (ptob(physmem));
 }
 
 int
@@ -204,8 +204,7 @@ arc_memory_throttle(spa_t *spa, uint64_t reserve, uint64_t txg)
 uint64_t
 arc_free_memory(void)
 {
-	/* XXX */
-	return (0);
+	return (ptob(freemem));
 }
 
 static eventhandler_tag arc_event_lowmem = NULL;