From dfba81d2fcc227ffc2ce546d9884580f682e68b5 Mon Sep 17 00:00:00 2001 From: Keir Fraser Date: Tue, 22 Jan 2008 11:35:26 +0000 Subject: minios: fix case when _text is not 0 Signed-off-by: Samuel Thibault --- extras/mini-os/arch/x86/mm.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'extras/mini-os/arch') diff --git a/extras/mini-os/arch/x86/mm.c b/extras/mini-os/arch/x86/mm.c index b8f55b7c58..5e6f180efd 100644 --- a/extras/mini-os/arch/x86/mm.c +++ b/extras/mini-os/arch/x86/mm.c @@ -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; -- cgit v1.2.3