Module Name: src
Committed By: ad
Date: Sun Sep 10 14:31:24 UTC 2023
Modified Files:
src/sys/sys: lwp.h
Log Message:
KPREEMPT_ENABLE(): optimise away one of the conditionals; the same test is
repeated in kpreempt() which is rarely called.
To generate a diff of this commit:
cvs rdiff -u -r1.219 -r1.220 src/sys/sys/lwp.h
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/sys/lwp.h
diff -u src/sys/sys/lwp.h:1.219 src/sys/sys/lwp.h:1.220
--- src/sys/sys/lwp.h:1.219 Mon Aug 7 10:31:42 2023
+++ src/sys/sys/lwp.h Sun Sep 10 14:31:24 2023
@@ -1,4 +1,4 @@
-/* $NetBSD: lwp.h,v 1.219 2023/08/07 10:31:42 riastradh Exp $ */
+/* $NetBSD: lwp.h,v 1.220 2023/09/10 14:31:24 ad Exp $ */
/*
* Copyright (c) 2001, 2006, 2007, 2008, 2009, 2010, 2019, 2020
@@ -554,12 +554,10 @@ KPREEMPT_ENABLE(lwp_t *l)
KASSERTMSG(l == (l1 = curlwp), "l=%p curlwp=%p", l, l1);
KASSERT(l->l_nopreempt > 0);
__insn_barrier();
- if (--l->l_nopreempt != 0)
- return;
+ l->l_nopreempt--;
__insn_barrier();
if (__predict_false(l->l_dopreempt))
kpreempt(0);
- __insn_barrier();
}
/* For lwp::l_dopreempt */
