shithub: riscv

Download patch

ref: db27bd5be753519505973cc0226e3a49ef5aa23e
parent: 7e0cdf428a5c2a349293d973b0d07a1affa31e27
author: glenda <glenda@9front.local>
date: Tue Aug 9 13:47:39 EDT 2022

kernel: use 64 bits for mountids

We dont expose this anymore, wrapping
these would be bad. Just send more bits.

--- a/sys/src/9/port/pgrp.c
+++ b/sys/src/9/port/pgrp.c
@@ -9,8 +9,19 @@
 	Whinesecs = 10,		/* frequency of out-of-resources printing */
 };
 
-static Ref mountid;
+uvlong
+nextmount(void)
+{
+	static uvlong next = 0;
+	static Lock lk;
+	uvlong n;
 
+	lock(&lk);
+	n = ++next;
+	unlock(&lk);
+	return n;
+}
+
 Pgrp*
 newpgrp(void)
 {
@@ -119,7 +130,7 @@
 	 * Allocate mount ids in the same sequence as the parent group
 	 */
 	for(m = order; m != nil; m = m->order)
-		m->mountid = incref(&mountid);
+		m->mountid = nextmount();
 	runlock(&from->ns);
 	wunlock(&to->ns);
 }
@@ -239,7 +250,7 @@
 	m = smalloc(sizeof(Mount));
 	m->to = to;
 	incref(to);
-	m->mountid = incref(&mountid);
+	m->mountid = nextmount();
 	m->mflag = flag;
 	if(spec != nil)
 		kstrdup(&m->spec, spec);
--- a/sys/src/9/port/portdat.h
+++ b/sys/src/9/port/portdat.h
@@ -247,7 +247,7 @@
 
 struct Mount
 {
-	ulong	mountid;
+	uvlong	mountid;
 	int	mflag;
 	Mount*	next;
 	Mount*	order;