From 8d3a722b97013341a92cb609e3cf6f24a3954e5d Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Wed, 9 Apr 1997 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1997-04-09

---
 port/devmnt.c  |  2 +-
 port/taslock.c | 10 ++++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/port/devmnt.c b/port/devmnt.c
index 40e1635b44f15bf12a0a810f2ba34354627db195..9863801bc54f053cdce83849cef519714154e7c4 100644
--- a/port/devmnt.c
+++ b/port/devmnt.c
@@ -1058,7 +1058,7 @@ mntrepl(char *buf)
 }
 
 Dev mntdevtab = {
-	'm',
+	'M',
 	"mnt",
 
 	mntreset,
diff --git a/port/taslock.c b/port/taslock.c
index 31051540ded092f3aaa4ff22f2c5a5aacaffaec6..c44327f0173e47222e6af7d2cb415a63f6d01413 100644
--- a/port/taslock.c
+++ b/port/taslock.c
@@ -69,8 +69,18 @@ ilock(Lock *l)
 	}
 
 	for(;;){
+#ifdef notdef
 		while(l->key)
 			;
+#else
+{   int i;
+    i = 0;
+    while(l->key){
+	if(i++ > 100000000)
+	    panic("ilock loop: caller pc %luX, held by %luX\n", pc, l->pc);
+    }
+}
+#endif /* notdef */
 		if(tas(&l->key) == 0){
 			l->sr = x;
 			l->pc = pc;