From 2bea9c5040319c3fb9d928e7a84659742b2b46c7 Mon Sep 17 00:00:00 2001
From: kirill <kirill@openbsd.org>
Date: Sun, 29 Mar 2026 09:37:33 +0000
Subject: [PATCH] sys/tmpfs: use getnanotime() like FFS and MFS

Editing files on tmpfs uses nanotime() to update mtime, and touch uses
utimensat(UTIME_NOW) which uses getnanotime() which is cached and which
can be smaller.

So, sed ... A && touch B leads to mtime(A) > mtime(B) which isn't excted.

"Yep" deraadt@
---
 sys/tmpfs/tmpfs_subr.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sys/tmpfs/tmpfs_subr.c b/sys/tmpfs/tmpfs_subr.c
index 70ea9baa9dc..6b5322e1fb6 100644
--- a/sys/tmpfs/tmpfs_subr.c
+++ b/sys/tmpfs/tmpfs_subr.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: tmpfs_subr.c,v 1.27 2024/09/12 09:04:51 claudio Exp $	*/
+/*	$OpenBSD: tmpfs_subr.c,v 1.28 2026/03/29 09:37:33 kirill Exp $	*/
 /*	$NetBSD: tmpfs_subr.c,v 1.79 2012/03/13 18:40:50 elad Exp $	*/
 
 /*
@@ -1140,7 +1140,7 @@ tmpfs_update(tmpfs_node_t *node, int flags)
 {
 	struct timespec nowtm;
 
-	nanotime(&nowtm);
+	getnanotime(&nowtm);
 
 	if (flags & TMPFS_NODE_ACCESSED) {
 		node->tn_atime = nowtm;