x86: with the last user gone, remove set_pte_present

Impact: cleanup

set_pte_present() is no longer used, directly or indirectly,
so remove it.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Xen-devel <xen-devel@lists.xensource.com>
Cc: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Alok Kataria <akataria@vmware.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Avi Kivity <avi@redhat.com>
LKML-Reference: <1237406613-2929-2-git-send-email-jeremy@goop.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

8 files changed, 0 insertions, 56 deletions

diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h
index 31fe83b10a4f..7727aa8b7dda 100644
--- a/arch/x86/include/asm/paravirt.h
+++ b/arch/x86/include/asm/paravirt.h
@@ -317,8 +317,6 @@ struct pv_mmu_ops {
 #if PAGETABLE_LEVELS >= 3
 #ifdef CONFIG_X86_PAE
         void (*set_pte_atomic)(pte_t *ptep, pte_t pteval);
-        void (*set_pte_present)(struct mm_struct *mm, unsigned long addr,
-                                pte_t *ptep, pte_t pte);
         void (*pte_clear)(struct mm_struct *mm, unsigned long addr,
                           pte_t *ptep);
         void (*pmd_clear)(pmd_t *pmdp);
@@ -1365,13 +1363,6 @@ static inline void set_pte_atomic(pte_t *ptep, pte_t pte)
                     pte.pte, pte.pte >> 32);
 }
 
-static inline void set_pte_present(struct mm_struct *mm, unsigned long addr,
-                                   pte_t *ptep, pte_t pte)
-{
-        /* 5 arg words */
-        pv_mmu_ops.set_pte_present(mm, addr, ptep, pte);
-}
-
 static inline void pte_clear(struct mm_struct *mm, unsigned long addr,
                              pte_t *ptep)
 {
@@ -1388,12 +1379,6 @@ static inline void set_pte_atomic(pte_t *ptep, pte_t pte)
         set_pte(ptep, pte);
 }
 
-static inline void set_pte_present(struct mm_struct *mm, unsigned long addr,
-                                   pte_t *ptep, pte_t pte)
-{
-        set_pte(ptep, pte);
-}
-
 static inline void pte_clear(struct mm_struct *mm, unsigned long addr,
                              pte_t *ptep)
 {
diff --git a/arch/x86/include/asm/pgtable-2level.h b/arch/x86/include/asm/pgtable-2level.h
index c1774ac9da7a..2334982b339e 100644
--- a/arch/x86/include/asm/pgtable-2level.h
+++ b/arch/x86/include/asm/pgtable-2level.h
@@ -26,13 +26,6 @@ static inline void native_set_pte_atomic(pte_t *ptep, pte_t pte)
         native_set_pte(ptep, pte);
 }
 
-static inline void native_set_pte_present(struct mm_struct *mm,
-                                          unsigned long addr,
-                                          pte_t *ptep, pte_t pte)
-{
-        native_set_pte(ptep, pte);
-}
-
 static inline void native_pmd_clear(pmd_t *pmdp)
 {
         native_set_pmd(pmdp, __pmd(0));
diff --git a/arch/x86/include/asm/pgtable-3level.h b/arch/x86/include/asm/pgtable-3level.h
index 3f13cdf61156..177b0165ea01 100644
--- a/arch/x86/include/asm/pgtable-3level.h
+++ b/arch/x86/include/asm/pgtable-3level.h
@@ -31,23 +31,6 @@ static inline void native_set_pte(pte_t *ptep, pte_t pte)
         ptep->pte_low = pte.pte_low;
 }
 
-/*
- * Since this is only called on user PTEs, and the page fault handler
- * must handle the already racy situation of simultaneous page faults,
- * we are justified in merely clearing the PTE present bit, followed
- * by a set.  The ordering here is important.
- */
-static inline void native_set_pte_present(struct mm_struct *mm,
-                                          unsigned long addr,
-                                          pte_t *ptep, pte_t pte)
-{
-        ptep->pte_low = 0;
-        smp_wmb();
-        ptep->pte_high = pte.pte_high;
-        smp_wmb();
-        ptep->pte_low = pte.pte_low;
-}
-
 static inline void native_set_pte_atomic(pte_t *ptep, pte_t pte)
 {
         set_64bit((unsigned long long *)(ptep), native_pte_val(pte));
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index d0812e155f1d..29d96d168bc0 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -31,8 +31,6 @@ extern struct list_head pgd_list;
 #define set_pte(ptep, pte)              native_set_pte(ptep, pte)
 #define set_pte_at(mm, addr, ptep, pte) native_set_pte_at(mm, addr, ptep, pte)
 
-#define set_pte_present(mm, addr, ptep, pte)                            \
-        native_set_pte_present(mm, addr, ptep, pte)
 #define set_pte_atomic(ptep, pte)                                       \
         native_set_pte_atomic(ptep, pte)
 
diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c
index 478bca986eca..33019ddb56b4 100644
--- a/arch/x86/kernel/kvm.c
+++ b/arch/x86/kernel/kvm.c
@@ -138,12 +138,6 @@ static void kvm_set_pte_atomic(pte_t *ptep, pte_t pte)
         kvm_mmu_write(ptep, pte_val(pte));
 }
 
-static void kvm_set_pte_present(struct mm_struct *mm, unsigned long addr,
-                                pte_t *ptep, pte_t pte)
-{
-        kvm_mmu_write(ptep, pte_val(pte));
-}
-
 static void kvm_pte_clear(struct mm_struct *mm,
                           unsigned long addr, pte_t *ptep)
 {
@@ -220,7 +214,6 @@ static void paravirt_ops_setup(void)
 #if PAGETABLE_LEVELS >= 3
 #ifdef CONFIG_X86_PAE
                 pv_mmu_ops.set_pte_atomic = kvm_set_pte_atomic;
-                pv_mmu_ops.set_pte_present = kvm_set_pte_present;
                 pv_mmu_ops.pte_clear = kvm_pte_clear;
                 pv_mmu_ops.pmd_clear = kvm_pmd_clear;
 #endif
diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c
index 63dd358d8ee1..8e45f4464880 100644
--- a/arch/x86/kernel/paravirt.c
+++ b/arch/x86/kernel/paravirt.c
@@ -470,7 +470,6 @@ struct pv_mmu_ops pv_mmu_ops = {
 #if PAGETABLE_LEVELS >= 3
 #ifdef CONFIG_X86_PAE
         .set_pte_atomic = native_set_pte_atomic,
-        .set_pte_present = native_set_pte_present,
         .pte_clear = native_pte_clear,
         .pmd_clear = native_pmd_clear,
 #endif
diff --git a/arch/x86/kernel/vmi_32.c b/arch/x86/kernel/vmi_32.c
index 2cc4a90e2cb3..95deb9f2211e 100644
--- a/arch/x86/kernel/vmi_32.c
+++ b/arch/x86/kernel/vmi_32.c
@@ -395,11 +395,6 @@ static void vmi_set_pte_atomic(pte_t *ptep, pte_t pteval)
         vmi_ops.update_pte(ptep, VMI_PAGE_PT);
 }
 
-static void vmi_set_pte_present(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte)
-{
-        vmi_ops.set_pte(pte, ptep, vmi_flags_addr_defer(mm, addr, VMI_PAGE_PT, 1));
-}
-
 static void vmi_set_pud(pud_t *pudp, pud_t pudval)
 {
         /* Um, eww */
@@ -750,7 +745,6 @@ static inline int __init activate_vmi(void)
                 pv_mmu_ops.set_pmd = vmi_set_pmd;
 #ifdef CONFIG_X86_PAE
                 pv_mmu_ops.set_pte_atomic = vmi_set_pte_atomic;
-                pv_mmu_ops.set_pte_present = vmi_set_pte_present;
                 pv_mmu_ops.set_pud = vmi_set_pud;
                 pv_mmu_ops.pte_clear = vmi_pte_clear;
                 pv_mmu_ops.pmd_clear = vmi_pmd_clear;
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index 72f6a76dbfb9..db3802fb7b84 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -1870,7 +1870,6 @@ const struct pv_mmu_ops xen_mmu_ops __initdata = {
 
 #ifdef CONFIG_X86_PAE
         .set_pte_atomic = xen_set_pte_atomic,
-        .set_pte_present = xen_set_pte_at,
         .pte_clear = xen_pte_clear,
         .pmd_clear = xen_pmd_clear,
 #endif  /* CONFIG_X86_PAE */