xen: use early_brk for level2_kernel_pgt

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index 151813d9755..71c6af6c89a 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -1843,13 +1843,15 @@ __init pgd_t *xen_setup_kernel_pagetable(pgd_t *pgd,
         return pgd;
 }
 #else   /* !CONFIG_X86_64 */
-static pmd_t level2_kernel_pgt[PTRS_PER_PMD] __page_aligned_bss;
+static RESERVE_BRK_ARRAY(pmd_t, level2_kernel_pgt, PTRS_PER_PMD);
 
 __init pgd_t *xen_setup_kernel_pagetable(pgd_t *pgd,
                                          unsigned long max_pfn)
 {
         pmd_t *kernel_pmd;
 
+        level2_kernel_pgt = extend_brk(sizeof(pmd_t *) * PTRS_PER_PMD, PAGE_SIZE);
+
         max_pfn_mapped = PFN_DOWN(__pa(xen_start_info->pt_base) +
                                   xen_start_info->nr_pt_frames * PAGE_SIZE +
                                   512*1024);