[src/trunk]: src/sys/arch/usermode/dev Its a hack, but make sure the pages ar...

[reinoud <reinoud%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/c9f57571cd33
branches:  trunk
changeset: 319608:c9f57571cd33
user:      reinoud <reinoud%NetBSD.org@localhost>
date:      Mon Jun 04 20:06:52 2018 +0000

description:
Its a hack, but make sure the pages are paged in

diffstat:

 sys/arch/usermode/dev/ld_thunkbus.c |  8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diffs (36 lines):

diff -r 8dca4ce93f46 -r c9f57571cd33 sys/arch/usermode/dev/ld_thunkbus.c
--- a/sys/arch/usermode/dev/ld_thunkbus.c       Mon Jun 04 19:53:01 2018 +0000
+++ b/sys/arch/usermode/dev/ld_thunkbus.c       Mon Jun 04 20:06:52 2018 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: ld_thunkbus.c,v 1.32 2018/01/13 10:27:58 reinoud Exp $ */
+/* $NetBSD: ld_thunkbus.c,v 1.33 2018/06/04 20:06:52 reinoud Exp $ */
 
 /*-
  * Copyright (c) 2011 Jared D. McNeill <jmcneill%invisible.ca@localhost>
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: ld_thunkbus.c,v 1.32 2018/01/13 10:27:58 reinoud Exp $");
+__KERNEL_RCSID(0, "$NetBSD: ld_thunkbus.c,v 1.33 2018/06/04 20:06:52 reinoud Exp $");
 
 #include <sys/param.h>
 #include <sys/proc.h>
@@ -271,6 +271,9 @@
        //    bp->b_flags & B_READ ? "read" : "write",
        //    (unsigned int)bp->b_bcount, (long long)offset, bp->b_data, bp->b_flags);
 
+       /* this is silly, but better make sure */
+       thunk_assert_presence((vaddr_t) bp->b_data, (size_t) bp->b_bcount);
+
        /* read/write the request */
        if (bp->b_flags & B_READ) {
                ret = thunk_pread(sc->sc_fd, bp->b_data, bp->b_bcount, offset);
@@ -285,6 +288,7 @@
        if ((ret >= 0) && (ret == bp->b_bcount)) {
                bp->b_resid = 0;
        } else {
+               // printf("ret = %d, errno %d?\n",(int) ret, thunk_geterrno());
                bp->b_error = thunk_geterrno();
                bp->b_resid = bp->b_bcount;
        }