Clarify comment.

Thanks to Nathan Marz <nathanm@stanford.edu> for the question.

diff --git a/src/threads/palloc.c b/src/threads/palloc.c
index cef065ae98f11a9e7cac3cee0971a4435949c1ef..22a6b15972de40c4bde0cc4dab622c40caf3d157 100644 (file)
--- a/src/threads/palloc.c
+++ b/src/threads/palloc.c
@@ -107,7 +107,8 @@ palloc_get_multiple (enum palloc_flags flags, size_t page_cnt)
   return pages;
 }
 
-/* Obtains and returns a single free page.
+/* Obtains a single free page and returns its kernel virtual
+   address.
    If PAL_USER is set, the page is obtained from the user pool,
    otherwise from the kernel pool.  If PAL_ZERO is set in FLAGS,
    then the page is filled with zeros.  If no pages are