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

kernel/kalloc.c

@@ -39,7 +39,7 @@ freerange(void *pa_start, void *pa_end)
     kfree(p);
 }
 
-// Free the page of physical memory pointed at by v,
+// Free the page of physical memory pointed at by pa,
 // which normally should have been returned by a
 // call to kalloc().  (The exception is when
 // initializing the allocator; see kinit above.)

kernel/printf.c

@@ -109,6 +109,7 @@ printf(char *fmt, ...)
       break;
     }
   }
+  va_end(ap);
 
   if(locking)
     release(&pr.lock);

mkfs/mkfs.c

@@ -42,7 +42,7 @@ uint ialloc(ushort type);
 void iappend(uint inum, void *p, int n);
 void die(const char *);
 
-// convert to intel byte order
+// convert to riscv byte order
 ushort
 xshort(ushort x)
 {

user/ls.c

@@ -42,6 +42,7 @@ ls(char *path)
   }
 
   switch(st.type){
+  case T_DEVICE:
   case T_FILE:
     printf("%s %d %d %l\n", fmtname(path), st.type, st.ino, st.size);
     break;