From b452f8857f22089adca137f32b9456a208554800 Mon Sep 17 00:00:00 2001
From: cinap_lenrek <cinap_lenrek@felloff.net>
Date: Wed, 1 May 2019 10:07:39 +0200
Subject: kernel: export freepages() function so it can be used in mmurelease()

---
 sys/src/9/port/page.c    | 15 ++++++++++-----
 sys/src/9/port/portfns.h |  1 +
 2 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/sys/src/9/port/page.c b/sys/src/9/port/page.c
index 987f4c312..6e74cbe4e 100644
--- a/sys/src/9/port/page.c
+++ b/sys/src/9/port/page.c
@@ -82,15 +82,14 @@ pagechaindone(void)
 		wakeup(&palloc.pwait[1]);
 }
 
-static void
+void
 freepages(Page *head, Page *tail, ulong np)
 {
-	lock(&palloc);
+	assert(palloc.Lock.p == up);
 	tail->next = palloc.head;
 	palloc.head = head;
 	palloc.freecount += np;
 	pagechaindone();
-	unlock(&palloc);
 }
 
 ulong
@@ -142,8 +141,11 @@ pagereclaim(Image *i, ulong pages)
 	unlock(i);
 	putimage(i);
 
-	if(np > 0)
+	if(np > 0){
+		lock(&palloc);
 		freepages(fh, ft, np);
+		unlock(&palloc);
+	}
 
 	return np;
 }
@@ -238,8 +240,11 @@ putpage(Page *p)
 		decref(p);
 		return;
 	}
-	if(decref(p) == 0)
+	if(decref(p) == 0){
+		lock(&palloc);
 		freepages(p, p, 1);
+		unlock(&palloc);
+	}
 }
 
 void
diff --git a/sys/src/9/port/portfns.h b/sys/src/9/port/portfns.h
index 7360e93e9..6d41cd03a 100644
--- a/sys/src/9/port/portfns.h
+++ b/sys/src/9/port/portfns.h
@@ -117,6 +117,7 @@ void		free(void*);
 void		freeb(Block*);
 void		freeblist(Block*);
 int		freebroken(void);
+void		freepages(Page*, Page*, ulong);
 void		freepte(Segment*, Pte*);
 void		getcolor(ulong, ulong*, ulong*, ulong*);
 uintptr		getmalloctag(void*);
-- 
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