[Xen-changelog] [xen-unstable] minios: fix case when _text is not 0

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1201001726 0
# Node ID 7b1e7e8a51305df3afe90436d7acde30a1080604
# Parent  d5e22e766d1f2081aaf2c92fcf3144f1ba681843
minios: fix case when _text is not 0

Signed-off-by: Samuel Thibault <samuel.thibault@xxxxxxxxxxxxx>
---
 extras/mini-os/arch/x86/mm.c |   10 +++++-----
 1 files changed, 5 insertions(+), 5 deletions(-)

diff -r d5e22e766d1f -r 7b1e7e8a5130 extras/mini-os/arch/x86/mm.c
--- a/extras/mini-os/arch/x86/mm.c      Tue Jan 22 11:19:40 2008 +0000
+++ b/extras/mini-os/arch/x86/mm.c      Tue Jan 22 11:35:26 2008 +0000
@@ -497,11 +497,11 @@ static void clear_bootstrap(void)
     int n = sizeof(mfns)/sizeof(*mfns);
     pte_t nullpte = { };
 
-    /* Use page 0 as the CoW zero page */
-    memset(NULL, 0, PAGE_SIZE);
-    mfn_zero = pfn_to_mfn(0);
-    if (HYPERVISOR_update_va_mapping(0, nullpte, UVMF_INVLPG))
-       printk("Unable to unmap page 0\n");
+    /* Use first page as the CoW zero page */
+    memset(&_text, 0, PAGE_SIZE);
+    mfn_zero = pfn_to_mfn((unsigned long) &_text);
+    if (HYPERVISOR_update_va_mapping((unsigned long) &_text, nullpte, 
UVMF_INVLPG))
+       printk("Unable to unmap first page\n");
 
     set_xen_guest_handle(reservation.extent_start, mfns);
     reservation.nr_extents = n;

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