x86/paravirt: Remove paravirt ops pmd_update[_defer] and pte_update_defer

pte_update_defer can be removed as it is always set to the same
function as pte_update. So any usage of pte_update_defer() can be
replaced by pte_update().

pmd_update and pmd_update_defer are always set to paravirt_nop, so they
can just be nuked.

Signed-off-by: Juergen Gross <jgross@suse.com>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: jeremy@goop.org
Cc: chrisw@sous-sol.org
Cc: akataria@vmware.com
Cc: virtualization@lists.linux-foundation.org
Cc: xen-devel@lists.xen.org
Cc: konrad.wilk@oracle.com
Cc: david.vrabel@citrix.com
Cc: boris.ostrovsky@oracle.com
Link: http://lkml.kernel.org/r/1447771879-1806-1-git-send-email-jgross@suse.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

3 files changed, 2 insertions, 36 deletions

diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h
index 4d7f080e4706..cbbf41c0a328 100644
--- a/arch/x86/include/asm/paravirt.h
+++ b/arch/x86/include/asm/paravirt.h
@@ -366,23 +366,6 @@ static inline void pte_update(struct mm_struct *mm, unsigned long addr,
 {
 	PVOP_VCALL3(pv_mmu_ops.pte_update, mm, addr, ptep);
 }
-static inline void pmd_update(struct mm_struct *mm, unsigned long addr,
-			      pmd_t *pmdp)
-{
-	PVOP_VCALL3(pv_mmu_ops.pmd_update, mm, addr, pmdp);
-}
-
-static inline void pte_update_defer(struct mm_struct *mm, unsigned long addr,
-				    pte_t *ptep)
-{
-	PVOP_VCALL3(pv_mmu_ops.pte_update_defer, mm, addr, ptep);
-}
-
-static inline void pmd_update_defer(struct mm_struct *mm, unsigned long addr,
-				    pmd_t *pmdp)
-{
-	PVOP_VCALL3(pv_mmu_ops.pmd_update_defer, mm, addr, pmdp);
-}
 
 static inline pte_t __pte(pteval_t val)
 {
diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h
index 7afeafb8a4ee..0451503e1716 100644
--- a/arch/x86/include/asm/paravirt_types.h
+++ b/arch/x86/include/asm/paravirt_types.h
@@ -266,12 +266,6 @@ struct pv_mmu_ops {
 			   pmd_t *pmdp, pmd_t pmdval);
 	void (*pte_update)(struct mm_struct *mm, unsigned long addr,
 			   pte_t *ptep);
-	void (*pte_update_defer)(struct mm_struct *mm,
-				 unsigned long addr, pte_t *ptep);
-	void (*pmd_update)(struct mm_struct *mm, unsigned long addr,
-			   pmd_t *pmdp);
-	void (*pmd_update_defer)(struct mm_struct *mm,
-				 unsigned long addr, pmd_t *pmdp);
 
 	pte_t (*ptep_modify_prot_start)(struct mm_struct *mm, unsigned long addr,
 					pte_t *ptep);
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index c0b41f111a9a..e99cbe814ea8 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -69,9 +69,6 @@ extern struct mm_struct *pgd_page_get_mm(struct page *page);
 #define pmd_clear(pmd)			native_pmd_clear(pmd)
 
 #define pte_update(mm, addr, ptep)              do { } while (0)
-#define pte_update_defer(mm, addr, ptep)        do { } while (0)
-#define pmd_update(mm, addr, ptep)              do { } while (0)
-#define pmd_update_defer(mm, addr, ptep)        do { } while (0)
 
 #define pgd_val(x)	native_pgd_val(x)
 #define __pgd(x)	native_make_pgd(x)
@@ -721,14 +718,9 @@ static inline void native_set_pmd_at(struct mm_struct *mm, unsigned long addr,
  * updates should either be sets, clears, or set_pte_atomic for P->P
  * transitions, which means this hook should only be called for user PTEs.
  * This hook implies a P->P protection or access change has taken place, which
- * requires a subsequent TLB flush.  The notification can optionally be delayed
- * until the TLB flush event by using the pte_update_defer form of the
- * interface, but care must be taken to assure that the flush happens while
- * still holding the same page table lock so that the shadow and primary pages
- * do not become out of sync on SMP.
+ * requires a subsequent TLB flush.
  */
 #define pte_update(mm, addr, ptep)		do { } while (0)
-#define pte_update_defer(mm, addr, ptep)	do { } while (0)
 #endif
 
 /*
@@ -820,9 +812,7 @@ static inline int pmd_write(pmd_t pmd)
 static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm, unsigned long addr,
 				       pmd_t *pmdp)
 {
-	pmd_t pmd = native_pmdp_get_and_clear(pmdp);
-	pmd_update(mm, addr, pmdp);
-	return pmd;
+	return native_pmdp_get_and_clear(pmdp);
 }
 
 #define __HAVE_ARCH_PMDP_SET_WRPROTECT
@@ -830,7 +820,6 @@ static inline void pmdp_set_wrprotect(struct mm_struct *mm,
 				      unsigned long addr, pmd_t *pmdp)
 {
 	clear_bit(_PAGE_BIT_RW, (unsigned long *)pmdp);
-	pmd_update(mm, addr, pmdp);
 }
 
 /*