# HG changeset patch
# User kfraser@xxxxxxxxxxxxxxxxxxxxxxx
# Node ID 129ce4f59b6dc8e2406a13a058ef393894ff355f
# Parent a75c1bdfe76146ad591574d805be5be0a3098d2a
[LINUX] Replace pagetable walks by simple address calculation.
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>
---
linux-2.6-xen-sparse/arch/i386/mm/hypervisor.c | 20 ++------------------
1 files changed, 2 insertions(+), 18 deletions(-)
diff -r a75c1bdfe761 -r 129ce4f59b6d
linux-2.6-xen-sparse/arch/i386/mm/hypervisor.c
--- a/linux-2.6-xen-sparse/arch/i386/mm/hypervisor.c Fri Jun 30 10:24:14
2006 +0100
+++ b/linux-2.6-xen-sparse/arch/i386/mm/hypervisor.c Fri Jun 30 10:35:54
2006 +0100
@@ -271,10 +271,6 @@ int xen_create_contiguous_region(
int xen_create_contiguous_region(
unsigned long vstart, unsigned int order, unsigned int address_bits)
{
- pgd_t *pgd;
- pud_t *pud;
- pmd_t *pmd;
- pte_t *pte;
unsigned long *in_frames = discontig_frames, out_frame;
unsigned long frame, i, flags;
long rc;
@@ -313,11 +309,7 @@ int xen_create_contiguous_region(
/* 1. Zap current PTEs, remembering MFNs. */
for (i = 0; i < (1UL<<order); i++) {
- pgd = pgd_offset_k(vstart + (i*PAGE_SIZE));
- pud = pud_offset(pgd, (vstart + (i*PAGE_SIZE)));
- pmd = pmd_offset(pud, (vstart + (i*PAGE_SIZE)));
- pte = pte_offset_kernel(pmd, (vstart + (i*PAGE_SIZE)));
- in_frames[i] = pte_mfn(*pte);
+ in_frames[i] = pfn_to_mfn((__pa(vstart) >> PAGE_SHIFT) + i);
if (HYPERVISOR_update_va_mapping(vstart + (i*PAGE_SIZE),
__pte_ma(0), 0))
BUG();
@@ -372,10 +364,6 @@ int xen_create_contiguous_region(
void xen_destroy_contiguous_region(unsigned long vstart, unsigned int order)
{
- pgd_t *pgd;
- pud_t *pud;
- pmd_t *pmd;
- pte_t *pte;
unsigned long *out_frames = discontig_frames, in_frame;
unsigned long frame, i, flags;
long rc;
@@ -410,11 +398,7 @@ void xen_destroy_contiguous_region(unsig
contiguous_bitmap_clear(__pa(vstart) >> PAGE_SHIFT, 1UL << order);
/* 1. Find start MFN of contiguous extent. */
- pgd = pgd_offset_k(vstart);
- pud = pud_offset(pgd, vstart);
- pmd = pmd_offset(pud, vstart);
- pte = pte_offset_kernel(pmd, vstart);
- in_frame = pte_mfn(*pte);
+ in_frame = pfn_to_mfn(__pa(vstart) >> PAGE_SHIFT);
/* 2. Zap current PTEs. */
for (i = 0; i < (1UL<<order); i++) {
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