Samuel Thibault
2008-Jan-22 11:27 UTC
[Xen-devel] [PATCH] minios: fix case when _text is not 0
fix case when _text is not 0
Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>
diff -r b7ba0be77a47 extras/mini-os/arch/x86/mm.c
--- a/extras/mini-os/arch/x86/mm.c Tue Jan 22 10:56:36 2008 +0000
+++ b/extras/mini-os/arch/x86/mm.c Tue Jan 22 11:22:55 2008 +0000
@@ -564,11 +564,11 @@ 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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