Merge branch 'master' of g.csail.mit.edu:xv6-dev

d6dc5bcb · Robert Morris · aeaa3089 · 33188666 · d6dc5bcb · d6dc5bcb
--- a/exec.c
+++ b/exec.c
@@ -20,7 +20,6 @@ exec(char *path, char **argv)
  begin_op();
-  cprintf("exec %s\n", path);
  if((ip = namei(path)) == 0){
    end_op();
    return -1;
@@ -100,7 +99,6 @@ exec(char *path, char **argv)
  proc->tf->esp = sp;
  switchuvm(proc);
  freevm(oldpgdir);
-  cprintf("exec succeeded\n");
  return 0;
 bad:

--- a/runoff.list
+++ b/runoff.list
@@ -35,12 +35,14 @@ sysproc.c
 # file system
 buf.h
+sleeplock.h
 fcntl.h
 stat.h
 fs.h
 file.h
 ide.c
 bio.c
+sleeplock.c
 log.c
 fs.c
 file.c

--- a/spinlock.c
+++ b/spinlock.c
@@ -61,7 +61,7 @@ release(struct spinlock *lk)
  // Release the lock, equivalent to lk->locked = 0.
  // This code can't use a C assignment, since it might
-  // not be atomic.
+  // not be atomic. A real OS would use C atomics here.
  asm volatile("movl $0, %0" : "+m" (lk->locked) : );
  popcli();