From 0f4b850e85130fd11b611830dce7abde0d6457e7 Mon Sep 17 00:00:00 2001
From: Mateusz Guzik <mjg@FreeBSD.org>
Date: Sat, 30 Nov 2019 16:41:47 +0000
Subject: tmpfs: add fast path to tmpfs_access for common case lookup

VEXEC consists of vast majority of all calls and almost all targets have
at least 0111.
---
 sys/fs/tmpfs/tmpfs_vnops.c | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'sys/fs/tmpfs/tmpfs_vnops.c')

diff --git a/sys/fs/tmpfs/tmpfs_vnops.c b/sys/fs/tmpfs/tmpfs_vnops.c
index 3b64b73ab4fb..3ee90251f2fc 100644
--- a/sys/fs/tmpfs/tmpfs_vnops.c
+++ b/sys/fs/tmpfs/tmpfs_vnops.c
@@ -331,6 +331,12 @@ tmpfs_access(struct vop_access_args *v)
 
 	node = VP_TO_TMPFS_NODE(vp);
 
+	/*
+	 * Common case path lookup.
+	 */
+	if (__predict_true(accmode == VEXEC && (node->tn_mode & 0111) == 0111))
+		return (0);
+
 	switch (vp->v_type) {
 	case VDIR:
 		/* FALLTHROUGH */
-- 
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