From 4de1818baf096bb28d83e4ad37372e5cbaa5093f Mon Sep 17 00:00:00 2001
From: Mateusz Guzik <mjg@FreeBSD.org>
Date: Wed, 20 Nov 2019 12:06:29 +0000
Subject: [PATCH] linux: avoid overhead of P_CONTROLT checks if possible

Sponsored by:	The FreeBSD Foundation
---
 sys/compat/linux/linux_file.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sys/compat/linux/linux_file.c b/sys/compat/linux/linux_file.c
index 6302a0538756..57723e1aafd7 100644
--- a/sys/compat/linux/linux_file.c
+++ b/sys/compat/linux/linux_file.c
@@ -137,6 +137,8 @@ linux_common_open(struct thread *td, int dirfd, char *path, int l_flags, int mod
 			error = ELOOP;
 		goto done;
 	}
+	if (p->p_flag & P_CONTROLT)
+		goto done;
 	if (bsd_flags & O_NOCTTY)
 		goto done;