x86: add mm parameter to paravirt_alloc_pd

Add mm to paravirt_alloc_pd, partly to make it consistent with
paravirt_alloc_pt, and because later changes will make use of it.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/arch/x86/mm/pgtable_32.c b/arch/x86/mm/pgtable_32.c
index be61a1d..f85ee44 100644
--- a/arch/x86/mm/pgtable_32.c
+++ b/arch/x86/mm/pgtable_32.c
@@ -330,13 +330,15 @@
 	if (PTRS_PER_PMD == 1 || !pgd)
 		return pgd;
 
+	mm->pgd = pgd;		/* so that alloc_pd can use it */
+
  	for (i = 0; i < UNSHARED_PTRS_PER_PGD; ++i) {
 		pmd_t *pmd = pmd_cache_alloc(i);
 
 		if (!pmd)
 			goto out_oom;
 
-		paravirt_alloc_pd(__pa(pmd) >> PAGE_SHIFT);
+		paravirt_alloc_pd(mm, __pa(pmd) >> PAGE_SHIFT);
 		set_pgd(&pgd[i], __pgd(1 + __pa(pmd)));
 	}
 	return pgd;