[src/chs-ubc2]: src/sys/uvm fix uvn_flush() to work now that vnode offsets ar...

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

details:   https://anonhg.NetBSD.org/src/rev/c1ed9727ac8b
branches:  chs-ubc2
changeset: 471457:c1ed9727ac8b
user:      chs <chs%NetBSD.org@localhost>
date:      Wed Aug 11 05:40:13 1999 +0000

description:
fix uvn_flush() to work now that vnode offsets are signed.

diffstat:

 sys/uvm/uvm_vnode.c |  15 ++++++++-------
 1 files changed, 8 insertions(+), 7 deletions(-)

diffs (57 lines):

diff -r b0ba83bd4d16 -r c1ed9727ac8b sys/uvm/uvm_vnode.c
--- a/sys/uvm/uvm_vnode.c       Wed Aug 11 05:39:16 1999 +0000
+++ b/sys/uvm/uvm_vnode.c       Wed Aug 11 05:40:13 1999 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: uvm_vnode.c,v 1.22.2.1.2.7 1999/08/09 00:05:56 chs Exp $       */
+/*     $NetBSD: uvm_vnode.c,v 1.22.2.1.2.8 1999/08/11 05:40:13 chs Exp $       */
 
 /*
  * Copyright (c) 1997 Charles D. Cranor and Washington University.
@@ -500,7 +500,7 @@
        struct vm_page *pps[MAXBSIZE >> PAGE_SHIFT], **ppsp;
        int s;
        int npages, result, lcv;
-       boolean_t retval, need_iosync, by_list, needs_clean;
+       boolean_t retval, need_iosync, by_list, needs_clean, all;
        voff_t curoff;
        u_short pp_version;
        UVMHIST_FUNC("uvn_flush"); UVMHIST_CALLED(maphist);
@@ -528,8 +528,7 @@
        need_iosync = FALSE;
        retval = TRUE;          /* return value */
        if (flags & PGO_ALLPAGES) {
-               start = 0;
-               stop = -1;
+               all = TRUE;
                by_list = TRUE;         /* always go by the list */
        } else {
                start = trunc_page(start);
@@ -540,6 +539,7 @@
                               (int)round_page(uvn->u_size));
                }
 
+               all = FALSE;
                by_list = (uobj->uo_npages <= 
                    ((stop - start) >> PAGE_SHIFT) * UVN_HASH_PENALTY);
        }
@@ -565,8 +565,8 @@
                        for (pp = TAILQ_FIRST(&uobj->memq);
                             pp != NULL ;
                             pp = TAILQ_NEXT(pp, listq)) {
-                               if (pp->offset < start ||
-                                   (pp->offset >= stop && stop != -1))
+                               if (!all &&
+                                   (pp->offset < start || pp->offset >= stop))
                                        continue;
                                pp->flags &= ~PG_CLEANCHK;
                        }
@@ -608,7 +608,8 @@
                         * range check
                         */
 
-                       if (pp->offset < start || pp->offset >= stop) {
+                       if (!all &&
+                           (pp->offset < start || pp->offset >= stop)) {
                                ppnext = TAILQ_NEXT(pp, listq);
                                continue;
                        }