X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?p=pintos-anon;a=blobdiff_plain;f=doc%2Fuserprog.texi;h=612bb81ba553166d0796c84a923155a7e404ce45;hp=5bd0bb2b0d5681a14ceeeca5e49d9ff2b1ef724c;hb=e587ab7ffa2d548029189e540d5716f880932cb1;hpb=cd904d16ef888b5001c4509580240c06056b6262

diff --git a/doc/userprog.texi b/doc/userprog.texi
index 5bd0bb2..612bb81 100644
--- a/doc/userprog.texi
+++ b/doc/userprog.texi
@@ -443,7 +443,7 @@ put_user (uint8_t *udst, uint8_t byte)
 {
   int error_code;
   asm ("movl $1f, %0; movb %b2, %1; 1:"
-       : "=&a" (error_code), "=m" (*udst) : "r" (byte));
+       : "=&a" (error_code), "=m" (*udst) : "q" (byte));
   return error_code != -1;
 }
 @end verbatim