[Xen-changelog] [xen-unstable] minios: do not systematically free the page under shared info, as the

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

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1213980290 -3600
# Node ID 2483923066dd28a7e90d1940e4b65a307fd49684
# Parent  926a366ca82f43ff1f9fd90bac435f4835b4dbf9
minios: do not systematically free the page under shared info, as the
guest booted by PV-GRUB will need it.

Signed-off-by: Samuel Thibault <samuel.thibault@xxxxxxxxxxxxx>
---
 extras/mini-os/arch/x86/mm.c |   11 +++--------
 1 files changed, 3 insertions(+), 8 deletions(-)

diff -r 926a366ca82f -r 2483923066dd extras/mini-os/arch/x86/mm.c
--- a/extras/mini-os/arch/x86/mm.c      Fri Jun 20 15:21:26 2008 +0100
+++ b/extras/mini-os/arch/x86/mm.c      Fri Jun 20 17:44:50 2008 +0100
@@ -528,18 +528,13 @@ void *map_frames_ex(unsigned long *f, un
 
 static void clear_bootstrap(void)
 {
-    xen_pfn_t mfns[] = { virt_to_mfn(&shared_info) };
-    int n = sizeof(mfns)/sizeof(*mfns);
     pte_t nullpte = { };
 
     /* 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");
-
-    if (free_physical_pages(mfns, n) != n)
-       printk("Unable to free bootstrap pages\n");
+    mfn_zero = virt_to_mfn((unsigned long) &_text);
+    if (HYPERVISOR_update_va_mapping(0, nullpte, UVMF_INVLPG))
+       printk("Unable to unmap NULL page\n");
 }
 
 void arch_init_p2m(unsigned long max_pfn)

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