no more recursive locks

wakeup1() assumes you hold proc_table_lock
sleep(chan, lock) provides atomic sleep-and-release to wait for condition
ugly code in swtch/scheduler to implement new sleep
fix lots of bugs in pipes, wait, and exit
fix bugs if timer interrupt goes off in schedule()
console locks per line, not per byte

1 files changed, 1 insertions, 1 deletions

diff --git a/ide.c b/ide.c
index 95df053..e1ed25a 100644
--- a/ide.c
+++ b/ide.c
@@ -112,7 +112,7 @@ ide_start_read(uint32_t secno, void *dst, unsigned nsecs)
     panic("ide_start_read: nsecs too large");
 
   while ((head + 1) % NREQUEST == tail)
-    sleep (&disk_channel);
+    sleep (&disk_channel, 0);
 
   r = &request[head];
   r->secno = secno;