Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6

* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6: (29 commits) [S390] cpu hotplug: fix external interrupt subclass mask handling [S390] oprofile: dont access lowcore [S390] oprofile: add missing irq stats counter [S390] Ignore sendmmsg system call note wired up warning [S390] s390,oprofile: fix compile error for !CONFIG_SMP [S390] s390,oprofile: fix alert counter increment [S390] Remove unused includes in process.c [S390] get CPC image name [S390] sclp: event buffer dissection [S390] chsc: process channel-path-availability information [S390] refactor page table functions for better pgste support [S390] merge page_test_dirty and page_clear_dirty [S390] qdio: prevent compile warning [S390] sclp: remove unnecessary sendmask check [S390] convert old cpumask API into new one [S390] pfault: cleanup code [S390] pfault: cpu hotplug vs missing completion interrupts [S390] smp: add __noreturn attribute to cpu_die() [S390] percpu: implement arch specific irqsafe_cpu_ops [S390] vdso: disable gcov profiling ...
author: Linus Torvalds <torvalds@linux-foundation.org> 2011-05-24 15:06:02 -0400
committer: Linus Torvalds <torvalds@linux-foundation.org> 2011-05-24 15:06:02 -0400
commit: 0d66cba1ac3ad38614077443d604d6a09cec99de (patch)
tree: 383981fd93c7e6d467fb239edd51f935f1a481dd /arch/s390
parent: 4637f40f200063973553ce3c4c1ac6c247e4535c (diff)
parent: 5bd418784a2764a8d9de177a5462bfc008fd334a (diff)
35 files changed, 626 insertions, 668 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 4a7f14079e03..ff2d2371b2e9 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -230,17 +230,6 @@ config SYSVIPC_COMPAT
 config AUDIT_ARCH
        def_bool y
-config S390_EXEC_PROTECT
-        def_bool y
-        prompt "Data execute protection"
-        help
-          This option allows to enable a buffer overflow protection for user
-          space programs and it also selects the addressing mode option above.
-          The kernel parameter noexec=on will enable this feature and also
-          switch the addressing modes, default is disabled. Enabling this (via
-          kernel parameter) on machines earlier than IBM System z9 this will
-          reduce system performance.
 comment "Code generation options"
 choice
diff --git a/arch/s390/appldata/appldata_base.c b/arch/s390/appldata/appldata_base.c
index 5c91995b74e4..24bff4f1cc52 100644
--- a/arch/s390/appldata/appldata_base.c
+++ b/arch/s390/appldata/appldata_base.c
@@ -130,9 +130,7 @@ static void appldata_work_fn(struct work_struct *work)
 {
        struct list_head *lh;
        struct appldata_ops *ops;
-        int i;
-        i = 0;
        get_online_cpus();
        mutex_lock(&appldata_ops_mutex);
        list_for_each(lh, &appldata_ops_list) {
diff --git a/arch/s390/include/asm/cmpxchg.h b/arch/s390/include/asm/cmpxchg.h
index 7488e52efa97..81d7908416cf 100644
--- a/arch/s390/include/asm/cmpxchg.h
+++ b/arch/s390/include/asm/cmpxchg.h
@@ -167,7 +167,6 @@ static inline unsigned long __cmpxchg(void *ptr, unsigned long old,
 #ifdef CONFIG_64BIT
 #define cmpxchg64(ptr, o, n)                                            \
 ({                                                                      \
-        BUILD_BUG_ON(sizeof(*(ptr)) != 8);                              \
        cmpxchg((ptr), (o), (n));                                       \
 })
 #else /* CONFIG_64BIT */
diff --git a/arch/s390/include/asm/elf.h b/arch/s390/include/asm/elf.h
index 10c029cfcc7d..64b61bf72e93 100644
--- a/arch/s390/include/asm/elf.h
+++ b/arch/s390/include/asm/elf.h
@@ -196,18 +196,6 @@ do {								\
 } while (0)
 #endif /* __s390x__ */
-/*
- * An executable for which elf_read_implies_exec() returns TRUE will
- * have the READ_IMPLIES_EXEC personality flag set automatically.
- */
-#define elf_read_implies_exec(ex, executable_stack)     \
-({                                                      \
-        if (current->mm->context.noexec &&              \
-            executable_stack != EXSTACK_DISABLE_X)      \
-                disable_noexec(current->mm, current);   \
-        current->mm->context.noexec == 0;               \
-})
 #define STACK_RND_MASK  0x7ffUL
 #define ARCH_DLINFO                                                         \
diff --git a/arch/s390/include/asm/hugetlb.h b/arch/s390/include/asm/hugetlb.h
index b56403c2df28..799ed0f1643d 100644
--- a/arch/s390/include/asm/hugetlb.h
+++ b/arch/s390/include/asm/hugetlb.h
@@ -111,21 +111,10 @@ static inline void huge_ptep_invalidate(struct mm_struct *mm,
 {
        pmd_t *pmdp = (pmd_t *) ptep;
-        if (!MACHINE_HAS_IDTE) {
+        if (MACHINE_HAS_IDTE)
-                __pmd_csp(pmdp);
-                if (mm->context.noexec) {
-                        pmdp = get_shadow_table(pmdp);
-                        __pmd_csp(pmdp);
-                }
-                return;
-        }
-        __pmd_idte(address, pmdp);
-        if (mm->context.noexec) {
-                pmdp = get_shadow_table(pmdp);
                __pmd_idte(address, pmdp);
-        }
+        else
-        return;
+                __pmd_csp(pmdp);
 }
 #define huge_ptep_set_access_flags(__vma, __addr, __ptep, __entry, __dirty) \
diff --git a/arch/s390/include/asm/irq.h b/arch/s390/include/asm/irq.h
index db14a311f1d2..1544b90bd6d6 100644
--- a/arch/s390/include/asm/irq.h
+++ b/arch/s390/include/asm/irq.h
@@ -15,6 +15,7 @@ enum interruption_class {
        EXTINT_VRT,
        EXTINT_SCP,
        EXTINT_IUC,
+        EXTINT_CPM,
        IOINT_QAI,
        IOINT_QDI,
        IOINT_DAS,
diff --git a/arch/s390/include/asm/lowcore.h b/arch/s390/include/asm/lowcore.h
index 65e172f8209d..228cf0b295db 100644
--- a/arch/s390/include/asm/lowcore.h
+++ b/arch/s390/include/asm/lowcore.h
@@ -124,7 +124,7 @@ struct _lowcore {
        /* Address space pointer. */
        __u32   kernel_asce;                    /* 0x02ac */
        __u32   user_asce;                      /* 0x02b0 */
-        __u32   user_exec_asce;                 /* 0x02b4 */
+        __u32   current_pid;                    /* 0x02b4 */
        /* SMP info area */
        __u32   cpu_nr;                         /* 0x02b8 */
@@ -255,7 +255,7 @@ struct _lowcore {
        /* Address space pointer. */
        __u64   kernel_asce;                    /* 0x0310 */
        __u64   user_asce;                      /* 0x0318 */
-        __u64   user_exec_asce;                 /* 0x0320 */
+        __u64   current_pid;                    /* 0x0320 */
        /* SMP info area */
        __u32   cpu_nr;                         /* 0x0328 */
diff --git a/arch/s390/include/asm/mmu.h b/arch/s390/include/asm/mmu.h
index 78522cdefdd4..82d0847896a0 100644
--- a/arch/s390/include/asm/mmu.h
+++ b/arch/s390/include/asm/mmu.h
@@ -5,19 +5,18 @@ typedef struct {
        atomic_t attach_count;
        unsigned int flush_mm;
        spinlock_t list_lock;
-        struct list_head crst_list;
        struct list_head pgtable_list;
        unsigned long asce_bits;
        unsigned long asce_limit;
        unsigned long vdso_base;
-        int noexec;
+        /* Cloned contexts will be created with extended page tables. */
-        int has_pgste;   /* The mmu context has extended page tables */
+        unsigned int alloc_pgste:1;
-        int alloc_pgste; /* cloned contexts will have extended page tables */
+        /* The mmu context has extended page tables. */
+        unsigned int has_pgste:1;
 } mm_context_t;
 #define INIT_MM_CONTEXT(name)                                                 \
        .context.list_lock    = __SPIN_LOCK_UNLOCKED(name.context.list_lock), \
-        .context.crst_list    = LIST_HEAD_INIT(name.context.crst_list),       \
        .context.pgtable_list = LIST_HEAD_INIT(name.context.pgtable_list),
 #endif
diff --git a/arch/s390/include/asm/mmu_context.h b/arch/s390/include/asm/mmu_context.h
index 8c277caa8d3a..5682f160ff82 100644
--- a/arch/s390/include/asm/mmu_context.h
+++ b/arch/s390/include/asm/mmu_context.h
@@ -35,11 +35,9 @@ static inline int init_new_context(struct task_struct *tsk,
                 * and if has_pgste is set, it will create extended page
                 * tables.
                 */
-                mm->context.noexec = 0;
                mm->context.has_pgste = 1;
                mm->context.alloc_pgste = 1;
        } else {
-                mm->context.noexec = (user_mode == SECONDARY_SPACE_MODE);
                mm->context.has_pgste = 0;
                mm->context.alloc_pgste = 0;
        }
@@ -63,10 +61,8 @@ static inline void update_mm(struct mm_struct *mm, struct task_struct *tsk)
        S390_lowcore.user_asce = mm->context.asce_bits | __pa(pgd);
        if (user_mode != HOME_SPACE_MODE) {
                /* Load primary space page table origin. */
-                pgd = mm->context.noexec ? get_shadow_table(pgd) : pgd;
-                S390_lowcore.user_exec_asce = mm->context.asce_bits | __pa(pgd);
                asm volatile(LCTL_OPCODE" 1,1,%0\n"
-                             : : "m" (S390_lowcore.user_exec_asce) );
+                             : : "m" (S390_lowcore.user_asce) );
        } else
                /* Load home space page table origin. */
                asm volatile(LCTL_OPCODE" 13,13,%0"
diff --git a/arch/s390/include/asm/page.h b/arch/s390/include/asm/page.h
index 3c987e9ec8d6..accb372ddc7e 100644
--- a/arch/s390/include/asm/page.h
+++ b/arch/s390/include/asm/page.h
@@ -90,6 +90,7 @@ static inline void copy_page(void *to, void *from)
 */
 typedef struct { unsigned long pgprot; } pgprot_t;
+typedef struct { unsigned long pgste; } pgste_t;
 typedef struct { unsigned long pte; } pte_t;
 typedef struct { unsigned long pmd; } pmd_t;
 typedef struct { unsigned long pud; } pud_t;
@@ -97,18 +98,21 @@ typedef struct { unsigned long pgd; } pgd_t;
 typedef pte_t *pgtable_t;
 #define pgprot_val(x)   ((x).pgprot)
+#define pgste_val(x)    ((x).pgste)
 #define pte_val(x)      ((x).pte)
 #define pmd_val(x)      ((x).pmd)
 #define pud_val(x)      ((x).pud)
 #define pgd_val(x)      ((x).pgd)
+#define __pgste(x)      ((pgste_t) { (x) } )
 #define __pte(x)        ((pte_t) { (x) } )
 #define __pmd(x)        ((pmd_t) { (x) } )
+#define __pud(x)        ((pud_t) { (x) } )
 #define __pgd(x)        ((pgd_t) { (x) } )
 #define __pgprot(x)     ((pgprot_t) { (x) } )
-static inline void
+static inline void page_set_storage_key(unsigned long addr,
-page_set_storage_key(unsigned long addr, unsigned int skey, int mapped)
+                                        unsigned char skey, int mapped)
 {
        if (!mapped)
                asm volatile(".insn rrf,0xb22b0000,%0,%1,8,0"
@@ -117,15 +121,59 @@ page_set_storage_key(unsigned long addr, unsigned int skey, int mapped)
                asm volatile("sske %0,%1" : : "d" (skey), "a" (addr));
 }
-static inline unsigned int
+static inline unsigned char page_get_storage_key(unsigned long addr)
-page_get_storage_key(unsigned long addr)
 {
-        unsigned int skey;
+        unsigned char skey;
-        asm volatile("iske %0,%1" : "=d" (skey) : "a" (addr), "0" (0));
+        asm volatile("iske %0,%1" : "=d" (skey) : "a" (addr));
        return skey;
 }
+static inline int page_reset_referenced(unsigned long addr)
+{
+        unsigned int ipm;
+        asm volatile(
+                "       rrbe    0,%1\n"
+                "       ipm     %0\n"
+                : "=d" (ipm) : "a" (addr) : "cc");
+        return !!(ipm & 0x20000000);
+}
+/* Bits int the storage key */
+#define _PAGE_CHANGED           0x02    /* HW changed bit               */
+#define _PAGE_REFERENCED        0x04    /* HW referenced bit            */
+#define _PAGE_FP_BIT            0x08    /* HW fetch protection bit      */
+#define _PAGE_ACC_BITS          0xf0    /* HW access control bits       */
+/*
+ * Test and clear dirty bit in storage key.
+ * We can't clear the changed bit atomically. This is a potential
+ * race against modification of the referenced bit. This function
+ * should therefore only be called if it is not mapped in any
+ * address space.
+ */
+#define __HAVE_ARCH_PAGE_TEST_AND_CLEAR_DIRTY
+static inline int page_test_and_clear_dirty(unsigned long pfn, int mapped)
+{
+        unsigned char skey;
+        skey = page_get_storage_key(pfn << PAGE_SHIFT);
+        if (!(skey & _PAGE_CHANGED))
+                return 0;
+        page_set_storage_key(pfn << PAGE_SHIFT, skey & ~_PAGE_CHANGED, mapped);
+        return 1;
+}
+/*
+ * Test and clear referenced bit in storage key.
+ */
+#define __HAVE_ARCH_PAGE_TEST_AND_CLEAR_YOUNG
+static inline int page_test_and_clear_young(unsigned long pfn)
+{
+        return page_reset_referenced(pfn << PAGE_SHIFT);
+}
 struct page;
 void arch_free_page(struct page *page, int order);
 void arch_alloc_page(struct page *page, int order);
diff --git a/arch/s390/include/asm/percpu.h b/arch/s390/include/asm/percpu.h
index f7ad8719d02d..5325c89a5843 100644
--- a/arch/s390/include/asm/percpu.h
+++ b/arch/s390/include/asm/percpu.h
@@ -1,6 +1,9 @@
 #ifndef __ARCH_S390_PERCPU__
 #define __ARCH_S390_PERCPU__
+#include <linux/preempt.h>
+#include <asm/cmpxchg.h>
 /*
 * s390 uses its own implementation for per cpu data, the offset of
 * the cpu local data area is cached in the cpu's lowcore memory.
@@ -16,6 +19,71 @@
 #define ARCH_NEEDS_WEAK_PER_CPU
 #endif
+#define arch_irqsafe_cpu_to_op(pcp, val, op)                            \
+do {                                                                    \
+        typedef typeof(pcp) pcp_op_T__;                                 \
+        pcp_op_T__ old__, new__, prev__;                                \
+        pcp_op_T__ *ptr__;                                              \
+        preempt_disable();                                              \
+        ptr__ = __this_cpu_ptr(&(pcp));                                 \
+        prev__ = *ptr__;                                                \
+        do {                                                            \
+                old__ = prev__;                                         \
+                new__ = old__ op (val);                                 \
+                switch (sizeof(*ptr__)) {                               \
+                case 8:                                                 \
+                        prev__ = cmpxchg64(ptr__, old__, new__);        \
+                        break;                                          \
+                default:                                                \
+                        prev__ = cmpxchg(ptr__, old__, new__);          \
+                }                                                       \
+        } while (prev__ != old__);                                      \
+        preempt_enable();                                               \
+} while (0)
+#define irqsafe_cpu_add_1(pcp, val) arch_irqsafe_cpu_to_op(pcp, val, +)
+#define irqsafe_cpu_add_2(pcp, val) arch_irqsafe_cpu_to_op(pcp, val, +)
+#define irqsafe_cpu_add_4(pcp, val) arch_irqsafe_cpu_to_op(pcp, val, +)
+#define irqsafe_cpu_add_8(pcp, val) arch_irqsafe_cpu_to_op(pcp, val, +)
+#define irqsafe_cpu_and_1(pcp, val) arch_irqsafe_cpu_to_op(pcp, val, &)
+#define irqsafe_cpu_and_2(pcp, val) arch_irqsafe_cpu_to_op(pcp, val, &)
+#define irqsafe_cpu_and_4(pcp, val) arch_irqsafe_cpu_to_op(pcp, val, &)
+#define irqsafe_cpu_and_8(pcp, val) arch_irqsafe_cpu_to_op(pcp, val, &)
+#define irqsafe_cpu_or_1(pcp, val) arch_irqsafe_cpu_to_op(pcp, val, |)
+#define irqsafe_cpu_or_2(pcp, val) arch_irqsafe_cpu_to_op(pcp, val, |)
+#define irqsafe_cpu_or_4(pcp, val) arch_irqsafe_cpu_to_op(pcp, val, |)
+#define irqsafe_cpu_or_8(pcp, val) arch_irqsafe_cpu_to_op(pcp, val, |)
+#define irqsafe_cpu_xor_1(pcp, val) arch_irqsafe_cpu_to_op(pcp, val, ^)
+#define irqsafe_cpu_xor_2(pcp, val) arch_irqsafe_cpu_to_op(pcp, val, ^)
+#define irqsafe_cpu_xor_4(pcp, val) arch_irqsafe_cpu_to_op(pcp, val, ^)
+#define irqsafe_cpu_xor_8(pcp, val) arch_irqsafe_cpu_to_op(pcp, val, ^)
+#define arch_irqsafe_cpu_cmpxchg(pcp, oval, nval)                       \
+({                                                                      \
+        typedef typeof(pcp) pcp_op_T__;                                 \
+        pcp_op_T__ ret__;                                               \
+        pcp_op_T__ *ptr__;                                              \
+        preempt_disable();                                              \
+        ptr__ = __this_cpu_ptr(&(pcp));                                 \
+        switch (sizeof(*ptr__)) {                                       \
+        case 8:                                                         \
+                ret__ = cmpxchg64(ptr__, oval, nval);                   \
+                break;                                                  \
+        default:                                                        \
+                ret__ = cmpxchg(ptr__, oval, nval);                     \
+        }                                                               \
+        preempt_enable();                                               \
+        ret__;                                                          \
+})
+#define irqsafe_cpu_cmpxchg_1(pcp, oval, nval) arch_irqsafe_cpu_cmpxchg(pcp, oval, nval)
+#define irqsafe_cpu_cmpxchg_2(pcp, oval, nval) arch_irqsafe_cpu_cmpxchg(pcp, oval, nval)
+#define irqsafe_cpu_cmpxchg_4(pcp, oval, nval) arch_irqsafe_cpu_cmpxchg(pcp, oval, nval)
+#define irqsafe_cpu_cmpxchg_8(pcp, oval, nval) arch_irqsafe_cpu_cmpxchg(pcp, oval, nval)
 #include <asm-generic/percpu.h>
 #endif /* __ARCH_S390_PERCPU__ */
diff --git a/arch/s390/include/asm/pgalloc.h b/arch/s390/include/asm/pgalloc.h
index 082eb4e50e8b..f6314af3b354 100644
--- a/arch/s390/include/asm/pgalloc.h
+++ b/arch/s390/include/asm/pgalloc.h
@@ -19,14 +19,13 @@
 #define check_pgt_cache()       do {} while (0)
-unsigned long *crst_table_alloc(struct mm_struct *, int);
+unsigned long *crst_table_alloc(struct mm_struct *);
 void crst_table_free(struct mm_struct *, unsigned long *);
 void crst_table_free_rcu(struct mm_struct *, unsigned long *);
 unsigned long *page_table_alloc(struct mm_struct *);
 void page_table_free(struct mm_struct *, unsigned long *);
 void page_table_free_rcu(struct mm_struct *, unsigned long *);
-void disable_noexec(struct mm_struct *, struct task_struct *);
 static inline void clear_table(unsigned long *s, unsigned long val, size_t n)
 {
@@ -50,9 +49,6 @@ static inline void clear_table(unsigned long *s, unsigned long val, size_t n)
 static inline void crst_table_init(unsigned long *crst, unsigned long entry)
 {
        clear_table(crst, entry, sizeof(unsigned long)*2048);
-        crst = get_shadow_table(crst);
-        if (crst)
-                clear_table(crst, entry, sizeof(unsigned long)*2048);
 }
 #ifndef __s390x__
@@ -69,10 +65,7 @@ static inline unsigned long pgd_entry_type(struct mm_struct *mm)
 #define pmd_free(mm, x)                         do { } while (0)
 #define pgd_populate(mm, pgd, pud)              BUG()
-#define pgd_populate_kernel(mm, pgd, pud)       BUG()
 #define pud_populate(mm, pud, pmd)              BUG()
-#define pud_populate_kernel(mm, pud, pmd)       BUG()
 #else /* __s390x__ */
@@ -90,7 +83,7 @@ void crst_table_downgrade(struct mm_struct *, unsigned long limit);
 static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long address)
 {
-        unsigned long *table = crst_table_alloc(mm, mm->context.noexec);
+        unsigned long *table = crst_table_alloc(mm);
        if (table)
                crst_table_init(table, _REGION3_ENTRY_EMPTY);
        return (pud_t *) table;
@@ -99,43 +92,21 @@ static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long address)
 static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long vmaddr)
 {
-        unsigned long *table = crst_table_alloc(mm, mm->context.noexec);
+        unsigned long *table = crst_table_alloc(mm);
        if (table)
                crst_table_init(table, _SEGMENT_ENTRY_EMPTY);
        return (pmd_t *) table;
 }
 #define pmd_free(mm, pmd) crst_table_free(mm, (unsigned long *) pmd)
-static inline void pgd_populate_kernel(struct mm_struct *mm,
-                                       pgd_t *pgd, pud_t *pud)
-{
-        pgd_val(*pgd) = _REGION2_ENTRY | __pa(pud);
-}
 static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud)
 {
-        pgd_populate_kernel(mm, pgd, pud);
+        pgd_val(*pgd) = _REGION2_ENTRY | __pa(pud);
-        if (mm->context.noexec) {
-                pgd = get_shadow_table(pgd);
-                pud = get_shadow_table(pud);
-                pgd_populate_kernel(mm, pgd, pud);
-        }
-}
-static inline void pud_populate_kernel(struct mm_struct *mm,
-                                       pud_t *pud, pmd_t *pmd)
-{
-        pud_val(*pud) = _REGION3_ENTRY | __pa(pmd);
 }
 static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
 {
-        pud_populate_kernel(mm, pud, pmd);
+        pud_val(*pud) = _REGION3_ENTRY | __pa(pmd);
-        if (mm->context.noexec) {
-                pud = get_shadow_table(pud);
-                pmd = get_shadow_table(pmd);
-                pud_populate_kernel(mm, pud, pmd);
-        }
 }
 #endif /* __s390x__ */
@@ -143,29 +114,19 @@ static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
 static inline pgd_t *pgd_alloc(struct mm_struct *mm)
 {
        spin_lock_init(&mm->context.list_lock);
-        INIT_LIST_HEAD(&mm->context.crst_list);
        INIT_LIST_HEAD(&mm->context.pgtable_list);
-        return (pgd_t *)
+        return (pgd_t *) crst_table_alloc(mm);
-                crst_table_alloc(mm, user_mode == SECONDARY_SPACE_MODE);
 }
 #define pgd_free(mm, pgd) crst_table_free(mm, (unsigned long *) pgd)
-static inline void pmd_populate_kernel(struct mm_struct *mm,
-                                       pmd_t *pmd, pte_t *pte)
-{
-        pmd_val(*pmd) = _SEGMENT_ENTRY + __pa(pte);
-}
 static inline void pmd_populate(struct mm_struct *mm,
                                pmd_t *pmd, pgtable_t pte)
 {
-        pmd_populate_kernel(mm, pmd, pte);
+        pmd_val(*pmd) = _SEGMENT_ENTRY + __pa(pte);
-        if (mm->context.noexec) {
-                pmd = get_shadow_table(pmd);
-                pmd_populate_kernel(mm, pmd, pte + PTRS_PER_PTE);
-        }
 }
+#define pmd_populate_kernel(mm, pmd, pte) pmd_populate(mm, pmd, pte)
 #define pmd_pgtable(pmd) \
        (pgtable_t)(pmd_val(pmd) & -sizeof(pte_t)*PTRS_PER_PTE)
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index 02ace3491c51..c4773a2ef3d3 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -31,9 +31,8 @@
 #ifndef __ASSEMBLY__
 #include <linux/sched.h>
 #include <linux/mm_types.h>
-#include <asm/bitops.h>
 #include <asm/bug.h>
-#include <asm/processor.h>
+#include <asm/page.h>
 extern pgd_t swapper_pg_dir[] __attribute__ ((aligned (4096)));
 extern void paging_init(void);
@@ -243,11 +242,13 @@ extern unsigned long VMALLOC_START;
 /* Software bits in the page table entry */
 #define _PAGE_SWT       0x001           /* SW pte type bit t */
 #define _PAGE_SWX       0x002           /* SW pte type bit x */
-#define _PAGE_SPECIAL   0x004           /* SW associated with special page */
+#define _PAGE_SWC       0x004           /* SW pte changed bit (for KVM) */
+#define _PAGE_SWR       0x008           /* SW pte referenced bit (for KVM) */
+#define _PAGE_SPECIAL   0x010           /* SW associated with special page */
 #define __HAVE_ARCH_PTE_SPECIAL
 /* Set of bits not changed in pte_modify */
-#define _PAGE_CHG_MASK  (PAGE_MASK | _PAGE_SPECIAL)
+#define _PAGE_CHG_MASK  (PAGE_MASK | _PAGE_SPECIAL | _PAGE_SWC | _PAGE_SWR)
 /* Six different types of pages. */
 #define _PAGE_TYPE_EMPTY        0x400
@@ -256,8 +257,6 @@ extern unsigned long VMALLOC_START;
 #define _PAGE_TYPE_FILE         0x601   /* bit 0x002 is used for offset !! */
 #define _PAGE_TYPE_RO           0x200
 #define _PAGE_TYPE_RW           0x000
-#define _PAGE_TYPE_EX_RO        0x202
-#define _PAGE_TYPE_EX_RW        0x002
 /*
 * Only four types for huge pages, using the invalid bit and protection bit
@@ -287,8 +286,6 @@ extern unsigned long VMALLOC_START;
 * _PAGE_TYPE_FILE      11?1   ->   11?1
 * _PAGE_TYPE_RO        0100   ->   1100
 * _PAGE_TYPE_RW        0000   ->   1000
- * _PAGE_TYPE_EX_RO     0110   ->   1110
- * _PAGE_TYPE_EX_RW     0010   ->   1010
 *
 * pte_none is true for bits combinations 1000, 1010, 1100, 1110
 * pte_present is true for bits combinations 0000, 0010, 0100, 0110, 1001
@@ -297,14 +294,17 @@ extern unsigned long VMALLOC_START;
 */
 /* Page status table bits for virtualization */
-#define RCP_PCL_BIT     55
+#define RCP_ACC_BITS    0xf000000000000000UL
-#define RCP_HR_BIT      54
+#define RCP_FP_BIT      0x0800000000000000UL
-#define RCP_HC_BIT      53
+#define RCP_PCL_BIT     0x0080000000000000UL
-#define RCP_GR_BIT      50
+#define RCP_HR_BIT      0x0040000000000000UL
-#define RCP_GC_BIT      49
+#define RCP_HC_BIT      0x0020000000000000UL
+#define RCP_GR_BIT      0x0004000000000000UL
-/* User dirty bit for KVM's migration feature */
+#define RCP_GC_BIT      0x0002000000000000UL
-#define KVM_UD_BIT      47
+/* User dirty / referenced bit for KVM's migration feature */
+#define KVM_UR_BIT      0x0000800000000000UL
+#define KVM_UC_BIT      0x0000400000000000UL
 #ifndef __s390x__
@@ -377,85 +377,54 @@ extern unsigned long VMALLOC_START;
 #define _ASCE_USER_BITS         (_ASCE_SPACE_SWITCH | _ASCE_PRIVATE_SPACE | \
                                 _ASCE_ALT_EVENT)
-/* Bits int the storage key */
-#define _PAGE_CHANGED    0x02          /* HW changed bit                   */
-#define _PAGE_REFERENCED 0x04          /* HW referenced bit                */
 /*
 * Page protection definitions.
 */
 #define PAGE_NONE       __pgprot(_PAGE_TYPE_NONE)
 #define PAGE_RO         __pgprot(_PAGE_TYPE_RO)
 #define PAGE_RW         __pgprot(_PAGE_TYPE_RW)
-#define PAGE_EX_RO      __pgprot(_PAGE_TYPE_EX_RO)
-#define PAGE_EX_RW      __pgprot(_PAGE_TYPE_EX_RW)
 #define PAGE_KERNEL     PAGE_RW
 #define PAGE_COPY       PAGE_RO
 /*
- * Dependent on the EXEC_PROTECT option s390 can do execute protection.
+ * On s390 the page table entry has an invalid bit and a read-only bit.
- * Write permission always implies read permission. In theory with a
+ * Read permission implies execute permission and write permission
- * primary/secondary page table execute only can be implemented but
+ * implies read permission.
- * it would cost an additional bit in the pte to distinguish all the
- * different pte types. To avoid that execute permission currently
- * implies read permission as well.
 */
         /*xwr*/
 #define __P000  PAGE_NONE
 #define __P001  PAGE_RO
 #define __P010  PAGE_RO
 #define __P011  PAGE_RO
-#define __P100  PAGE_EX_RO
+#define __P100  PAGE_RO
-#define __P101  PAGE_EX_RO
+#define __P101  PAGE_RO
-#define __P110  PAGE_EX_RO
+#define __P110  PAGE_RO
-#define __P111  PAGE_EX_RO
+#define __P111  PAGE_RO
 #define __S000  PAGE_NONE
 #define __S001  PAGE_RO
 #define __S010  PAGE_RW
 #define __S011  PAGE_RW
-#define __S100  PAGE_EX_RO
+#define __S100  PAGE_RO
-#define __S101  PAGE_EX_RO
+#define __S101  PAGE_RO
-#define __S110  PAGE_EX_RW
+#define __S110  PAGE_RW
-#define __S111  PAGE_EX_RW
+#define __S111  PAGE_RW
-#ifndef __s390x__
-# define PxD_SHADOW_SHIFT       1
-#else /* __s390x__ */
-# define PxD_SHADOW_SHIFT       2
-#endif /* __s390x__ */
-static inline void *get_shadow_table(void *table)
+static inline int mm_exclusive(struct mm_struct *mm)
 {
-        unsigned long addr, offset;
+        return likely(mm == current->active_mm &&
-        struct page *page;
+                      atomic_read(&mm->context.attach_count) <= 1);
-        addr = (unsigned long) table;
-        offset = addr & ((PAGE_SIZE << PxD_SHADOW_SHIFT) - 1);
-        page = virt_to_page((void *)(addr ^ offset));
-        return (void *)(addr_t)(page->index ? (page->index | offset) : 0UL);
 }
-/*
+static inline int mm_has_pgste(struct mm_struct *mm)
- * Certain architectures need to do special things when PTEs
- * within a page table are directly modified.  Thus, the following
- * hook is made available.
- */
-static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
-                              pte_t *ptep, pte_t entry)
 {
-        *ptep = entry;
+#ifdef CONFIG_PGSTE
-        if (mm->context.noexec) {
+        if (unlikely(mm->context.has_pgste))
-                if (!(pte_val(entry) & _PAGE_INVALID) &&
+                return 1;
-                    (pte_val(entry) & _PAGE_SWX))
+#endif
-                        pte_val(entry) |= _PAGE_RO;
+        return 0;
-                else
-                        pte_val(entry) = _PAGE_TYPE_EMPTY;
-                ptep[PTRS_PER_PTE] = entry;
-        }
 }
 /*
 * pgd/pmd/pte query functions
 */
@@ -568,52 +537,127 @@ static inline int pte_special(pte_t pte)
 }
 #define __HAVE_ARCH_PTE_SAME
-#define pte_same(a,b)  (pte_val(a) == pte_val(b))
+static inline int pte_same(pte_t a, pte_t b)
+{
+        return pte_val(a) == pte_val(b);
+}
-static inline void rcp_lock(pte_t *ptep)
+static inline pgste_t pgste_get_lock(pte_t *ptep)
 {
+        unsigned long new = 0;
 #ifdef CONFIG_PGSTE
-        unsigned long *pgste = (unsigned long *) (ptep + PTRS_PER_PTE);
+        unsigned long old;
        preempt_disable();
-        while (test_and_set_bit(RCP_PCL_BIT, pgste))
+        asm(
-                ;
+                "       lg      %0,%2\n"
+                "0:     lgr     %1,%0\n"
+                "       nihh    %0,0xff7f\n"    /* clear RCP_PCL_BIT in old */
+                "       oihh    %1,0x0080\n"    /* set RCP_PCL_BIT in new */
+                "       csg     %0,%1,%2\n"
+                "       jl      0b\n"
+                : "=&d" (old), "=&d" (new), "=Q" (ptep[PTRS_PER_PTE])
+                : "Q" (ptep[PTRS_PER_PTE]) : "cc");
 #endif
+        return __pgste(new);
 }
-static inline void rcp_unlock(pte_t *ptep)
+static inline void pgste_set_unlock(pte_t *ptep, pgste_t pgste)
 {
 #ifdef CONFIG_PGSTE
-        unsigned long *pgste = (unsigned long *) (ptep + PTRS_PER_PTE);
+        asm(
-        clear_bit(RCP_PCL_BIT, pgste);
+                "       nihh    %1,0xff7f\n"    /* clear RCP_PCL_BIT */
+                "       stg     %1,%0\n"
+                : "=Q" (ptep[PTRS_PER_PTE])
+                : "d" (pgste_val(pgste)), "Q" (ptep[PTRS_PER_PTE]) : "cc");
        preempt_enable();
 #endif
 }
-/* forward declaration for SetPageUptodate in page-flags.h*/
+static inline pgste_t pgste_update_all(pte_t *ptep, pgste_t pgste)
-static inline void page_clear_dirty(struct page *page, int mapped);
-#include <linux/page-flags.h>
-static inline void ptep_rcp_copy(pte_t *ptep)
 {
 #ifdef CONFIG_PGSTE
-        struct page *page = virt_to_page(pte_val(*ptep));
+        unsigned long pfn, bits;
-        unsigned int skey;
+        unsigned char skey;
-        unsigned long *pgste = (unsigned long *) (ptep + PTRS_PER_PTE);
+        pfn = pte_val(*ptep) >> PAGE_SHIFT;
-        skey = page_get_storage_key(page_to_phys(page));
+        skey = page_get_storage_key(pfn);
-        if (skey & _PAGE_CHANGED) {
+        bits = skey & (_PAGE_CHANGED | _PAGE_REFERENCED);
-                set_bit_simple(RCP_GC_BIT, pgste);
+        /* Clear page changed & referenced bit in the storage key */
-                set_bit_simple(KVM_UD_BIT, pgste);
+        if (bits) {
+                skey ^= bits;
+                page_set_storage_key(pfn, skey, 1);
        }
-        if (skey & _PAGE_REFERENCED)
+        /* Transfer page changed & referenced bit to guest bits in pgste */
-                set_bit_simple(RCP_GR_BIT, pgste);
+        pgste_val(pgste) |= bits << 48;         /* RCP_GR_BIT & RCP_GC_BIT */
-        if (test_and_clear_bit_simple(RCP_HC_BIT, pgste)) {
+        /* Get host changed & referenced bits from pgste */
-                SetPageDirty(page);
+        bits |= (pgste_val(pgste) & (RCP_HR_BIT | RCP_HC_BIT)) >> 52;
-                set_bit_simple(KVM_UD_BIT, pgste);
+        /* Clear host bits in pgste. */
-        }
+        pgste_val(pgste) &= ~(RCP_HR_BIT | RCP_HC_BIT);
-        if (test_and_clear_bit_simple(RCP_HR_BIT, pgste))
+        pgste_val(pgste) &= ~(RCP_ACC_BITS | RCP_FP_BIT);
-                SetPageReferenced(page);
+        /* Copy page access key and fetch protection bit to pgste */
+        pgste_val(pgste) |=
+                (unsigned long) (skey & (_PAGE_ACC_BITS | _PAGE_FP_BIT)) << 56;
+        /* Transfer changed and referenced to kvm user bits */
+        pgste_val(pgste) |= bits << 45;         /* KVM_UR_BIT & KVM_UC_BIT */
+        /* Transfer changed & referenced to pte sofware bits */
+        pte_val(*ptep) |= bits << 1;            /* _PAGE_SWR & _PAGE_SWC */
 #endif
+        return pgste;
+}
+static inline pgste_t pgste_update_young(pte_t *ptep, pgste_t pgste)
+{
+#ifdef CONFIG_PGSTE
+        int young;
+        young = page_reset_referenced(pte_val(*ptep) & PAGE_MASK);
+        /* Transfer page referenced bit to pte software bit (host view) */
+        if (young || (pgste_val(pgste) & RCP_HR_BIT))
+                pte_val(*ptep) |= _PAGE_SWR;
+        /* Clear host referenced bit in pgste. */
+        pgste_val(pgste) &= ~RCP_HR_BIT;
+        /* Transfer page referenced bit to guest bit in pgste */
+        pgste_val(pgste) |= (unsigned long) young << 50; /* set RCP_GR_BIT */
+#endif
+        return pgste;
+}
+static inline void pgste_set_pte(pte_t *ptep, pgste_t pgste)
+{
+#ifdef CONFIG_PGSTE
+        unsigned long pfn;
+        unsigned long okey, nkey;
+        pfn = pte_val(*ptep) >> PAGE_SHIFT;
+        okey = nkey = page_get_storage_key(pfn);
+        nkey &= ~(_PAGE_ACC_BITS | _PAGE_FP_BIT);
+        /* Set page access key and fetch protection bit from pgste */
+        nkey |= (pgste_val(pgste) & (RCP_ACC_BITS | RCP_FP_BIT)) >> 56;
+        if (okey != nkey)
+                page_set_storage_key(pfn, nkey, 1);
+#endif
+}
+/*
+ * Certain architectures need to do special things when PTEs
+ * within a page table are directly modified.  Thus, the following
+ * hook is made available.
+ */
+static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
+                              pte_t *ptep, pte_t entry)
+{
+        pgste_t pgste;
+        if (mm_has_pgste(mm)) {
+                pgste = pgste_get_lock(ptep);
+                pgste_set_pte(ptep, pgste);
+                *ptep = entry;
+                pgste_set_unlock(ptep, pgste);
+        } else
+                *ptep = entry;
 }
 /*
@@ -627,19 +671,19 @@ static inline int pte_write(pte_t pte)
 static inline int pte_dirty(pte_t pte)
 {
-        /* A pte is neither clean nor dirty on s/390. The dirty bit
+#ifdef CONFIG_PGSTE
-         * is in the storage key. See page_test_and_clear_dirty for
+        if (pte_val(pte) & _PAGE_SWC)
-         * details.
+                return 1;
-         */
+#endif
        return 0;
 }
 static inline int pte_young(pte_t pte)
 {
-        /* A pte is neither young nor old on s/390. The young bit
+#ifdef CONFIG_PGSTE
-         * is in the storage key. See page_test_and_clear_young for
+        if (pte_val(pte) & _PAGE_SWR)
-         * details.
+                return 1;
-         */
+#endif
        return 0;
 }
@@ -647,64 +691,30 @@ static inline int pte_young(pte_t pte)
 * pgd/pmd/pte modification functions
 */
-#ifndef __s390x__
+static inline void pgd_clear(pgd_t *pgd)
-#define pgd_clear(pgd)          do { } while (0)
-#define pud_clear(pud)          do { } while (0)
-#else /* __s390x__ */
-static inline void pgd_clear_kernel(pgd_t * pgd)
 {
+#ifdef __s390x__
        if ((pgd_val(*pgd) & _REGION_ENTRY_TYPE_MASK) == _REGION_ENTRY_TYPE_R2)
                pgd_val(*pgd) = _REGION2_ENTRY_EMPTY;
+#endif
 }
-static inline void pgd_clear(pgd_t * pgd)
+static inline void pud_clear(pud_t *pud)
-{
-        pgd_t *shadow = get_shadow_table(pgd);
-        pgd_clear_kernel(pgd);
-        if (shadow)
-                pgd_clear_kernel(shadow);
-}
-static inline void pud_clear_kernel(pud_t *pud)
 {
+#ifdef __s390x__
        if ((pud_val(*pud) & _REGION_ENTRY_TYPE_MASK) == _REGION_ENTRY_TYPE_R3)
                pud_val(*pud) = _REGION3_ENTRY_EMPTY;
+#endif
 }
-static inline void pud_clear(pud_t *pud)
+static inline void pmd_clear(pmd_t *pmdp)
-{
-        pud_t *shadow = get_shadow_table(pud);
-        pud_clear_kernel(pud);
-        if (shadow)
-                pud_clear_kernel(shadow);
-}
-#endif /* __s390x__ */
-static inline void pmd_clear_kernel(pmd_t * pmdp)
 {
        pmd_val(*pmdp) = _SEGMENT_ENTRY_EMPTY;
 }
-static inline void pmd_clear(pmd_t *pmd)
-{
-        pmd_t *shadow = get_shadow_table(pmd);
-        pmd_clear_kernel(pmd);
-        if (shadow)
-                pmd_clear_kernel(shadow);
-}
 static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
 {
        pte_val(*ptep) = _PAGE_TYPE_EMPTY;
-        if (mm->context.noexec)
-                pte_val(ptep[PTRS_PER_PTE]) = _PAGE_TYPE_EMPTY;
 }
 /*
@@ -734,35 +744,27 @@ static inline pte_t pte_mkwrite(pte_t pte)
 static inline pte_t pte_mkclean(pte_t pte)
 {
-        /* The only user of pte_mkclean is the fork() code.
+#ifdef CONFIG_PGSTE
-           We must *not* clear the *physical* page dirty bit
+        pte_val(pte) &= ~_PAGE_SWC;
-           just because fork() wants to clear the dirty bit in
+#endif
-           *one* of the page's mappings.  So we just do nothing. */
        return pte;
 }
 static inline pte_t pte_mkdirty(pte_t pte)
 {
-        /* We do not explicitly set the dirty bit because the
-         * sske instruction is slow. It is faster to let the
-         * next instruction set the dirty bit.
-         */
        return pte;
 }
 static inline pte_t pte_mkold(pte_t pte)
 {
-        /* S/390 doesn't keep its dirty/referenced bit in the pte.
+#ifdef CONFIG_PGSTE
-         * There is no point in clearing the real referenced bit.
+        pte_val(pte) &= ~_PAGE_SWR;
-         */
+#endif
        return pte;
 }
 static inline pte_t pte_mkyoung(pte_t pte)
 {
-        /* S/390 doesn't keep its dirty/referenced bit in the pte.
-         * There is no point in setting the real referenced bit.
-         */
        return pte;
 }
@@ -800,62 +802,60 @@ static inline pte_t pte_mkhuge(pte_t pte)
 }
 #endif
-#ifdef CONFIG_PGSTE
 /*
- * Get (and clear) the user dirty bit for a PTE.
+ * Get (and clear) the user dirty bit for a pte.
 */
-static inline int kvm_s390_test_and_clear_page_dirty(struct mm_struct *mm,
+static inline int ptep_test_and_clear_user_dirty(struct mm_struct *mm,
-                                                     pte_t *ptep)
+                                                 pte_t *ptep)
 {
-        int dirty;
+        pgste_t pgste;
-        unsigned long *pgste;
+        int dirty = 0;
-        struct page *page;
-        unsigned int skey;
+        if (mm_has_pgste(mm)) {
+                pgste = pgste_get_lock(ptep);
-        if (!mm->context.has_pgste)
+                pgste = pgste_update_all(ptep, pgste);
-                return -EINVAL;
+                dirty = !!(pgste_val(pgste) & KVM_UC_BIT);
-        rcp_lock(ptep);
+                pgste_val(pgste) &= ~KVM_UC_BIT;
-        pgste = (unsigned long *) (ptep + PTRS_PER_PTE);
+                pgste_set_unlock(ptep, pgste);
-        page = virt_to_page(pte_val(*ptep));
+                return dirty;
-        skey = page_get_storage_key(page_to_phys(page));
-        if (skey & _PAGE_CHANGED) {
-                set_bit_simple(RCP_GC_BIT, pgste);
-                set_bit_simple(KVM_UD_BIT, pgste);
        }
-        if (test_and_clear_bit_simple(RCP_HC_BIT, pgste)) {
-                SetPageDirty(page);
-                set_bit_simple(KVM_UD_BIT, pgste);
-        }
-        dirty = test_and_clear_bit_simple(KVM_UD_BIT, pgste);
-        if (skey & _PAGE_CHANGED)
-                page_clear_dirty(page, 1);
-        rcp_unlock(ptep);
        return dirty;
 }
-#endif
+/*
+ * Get (and clear) the user referenced bit for a pte.
+ */
+static inline int ptep_test_and_clear_user_young(struct mm_struct *mm,
+                                                 pte_t *ptep)
+{
+        pgste_t pgste;
+        int young = 0;
+        if (mm_has_pgste(mm)) {
+                pgste = pgste_get_lock(ptep);
+                pgste = pgste_update_young(ptep, pgste);
+                young = !!(pgste_val(pgste) & KVM_UR_BIT);
+                pgste_val(pgste) &= ~KVM_UR_BIT;
+                pgste_set_unlock(ptep, pgste);
+        }
+        return young;
+}
 #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
 static inline int ptep_test_and_clear_young(struct vm_area_struct *vma,
                                            unsigned long addr, pte_t *ptep)
 {
-#ifdef CONFIG_PGSTE
+        pgste_t pgste;
-        unsigned long physpage;
+        pte_t pte;
-        int young;
-        unsigned long *pgste;
-        if (!vma->vm_mm->context.has_pgste)
+        if (mm_has_pgste(vma->vm_mm)) {
-                return 0;
+                pgste = pgste_get_lock(ptep);
-        physpage = pte_val(*ptep) & PAGE_MASK;
+                pgste = pgste_update_young(ptep, pgste);
-        pgste = (unsigned long *) (ptep + PTRS_PER_PTE);
+                pte = *ptep;
+                *ptep = pte_mkold(pte);
-        young = ((page_get_storage_key(physpage) & _PAGE_REFERENCED) != 0);
+                pgste_set_unlock(ptep, pgste);
-        rcp_lock(ptep);
+                return pte_young(pte);
-        if (young)
+        }
-                set_bit_simple(RCP_GR_BIT, pgste);
-        young |= test_and_clear_bit_simple(RCP_HR_BIT, pgste);
-        rcp_unlock(ptep);
-        return young;
-#endif
        return 0;
 }
@@ -867,10 +867,7 @@ static inline int ptep_clear_flush_young(struct vm_area_struct *vma,
         * On s390 reference bits are in storage key and never in TLB
         * With virtualization we handle the reference bit, without we
         * we can simply return */
-#ifdef CONFIG_PGSTE
        return ptep_test_and_clear_young(vma, address, ptep);
-#endif
-        return 0;
 }
 static inline void __ptep_ipte(unsigned long address, pte_t *ptep)
@@ -890,25 +887,6 @@ static inline void __ptep_ipte(unsigned long address, pte_t *ptep)
        }
 }
-static inline void ptep_invalidate(struct mm_struct *mm,
-                                   unsigned long address, pte_t *ptep)
-{
-        if (mm->context.has_pgste) {
-                rcp_lock(ptep);
-                __ptep_ipte(address, ptep);
-                ptep_rcp_copy(ptep);
-                pte_val(*ptep) = _PAGE_TYPE_EMPTY;
-                rcp_unlock(ptep);
-                return;
-        }
-        __ptep_ipte(address, ptep);
-        pte_val(*ptep) = _PAGE_TYPE_EMPTY;
-        if (mm->context.noexec) {
-                __ptep_ipte(address, ptep + PTRS_PER_PTE);
-                pte_val(*(ptep + PTRS_PER_PTE)) = _PAGE_TYPE_EMPTY;
-        }
-}
 /*
 * This is hard to understand. ptep_get_and_clear and ptep_clear_flush
 * both clear the TLB for the unmapped pte. The reason is that
@@ -923,24 +901,72 @@ static inline void ptep_invalidate(struct mm_struct *mm,
 * is a nop.
 */
 #define __HAVE_ARCH_PTEP_GET_AND_CLEAR
-#define ptep_get_and_clear(__mm, __address, __ptep)                     \
+static inline pte_t ptep_get_and_clear(struct mm_struct *mm,
-({                                                                      \
+                                       unsigned long address, pte_t *ptep)
-        pte_t __pte = *(__ptep);                                        \
+{
-        (__mm)->context.flush_mm = 1;                                   \
+        pgste_t pgste;
-        if (atomic_read(&(__mm)->context.attach_count) > 1 ||           \
+        pte_t pte;
-            (__mm) != current->active_mm)                               \
-                ptep_invalidate(__mm, __address, __ptep);               \
+        mm->context.flush_mm = 1;
-        else                                                            \
+        if (mm_has_pgste(mm))
-                pte_clear((__mm), (__address), (__ptep));               \
+                pgste = pgste_get_lock(ptep);
-        __pte;                                                          \
-})
+        pte = *ptep;
+        if (!mm_exclusive(mm))
+                __ptep_ipte(address, ptep);
+        pte_val(*ptep) = _PAGE_TYPE_EMPTY;
+        if (mm_has_pgste(mm)) {
+                pgste = pgste_update_all(&pte, pgste);
+                pgste_set_unlock(ptep, pgste);
+        }
+        return pte;
+}
+#define __HAVE_ARCH_PTEP_MODIFY_PROT_TRANSACTION
+static inline pte_t ptep_modify_prot_start(struct mm_struct *mm,
+                                           unsigned long address,
+                                           pte_t *ptep)
+{
+        pte_t pte;
+        mm->context.flush_mm = 1;
+        if (mm_has_pgste(mm))
+                pgste_get_lock(ptep);
+        pte = *ptep;
+        if (!mm_exclusive(mm))
+                __ptep_ipte(address, ptep);
+        return pte;
+}
+static inline void ptep_modify_prot_commit(struct mm_struct *mm,
+                                           unsigned long address,
+                                           pte_t *ptep, pte_t pte)
+{
+        *ptep = pte;
+        if (mm_has_pgste(mm))
+                pgste_set_unlock(ptep, *(pgste_t *)(ptep + PTRS_PER_PTE));
+}
 #define __HAVE_ARCH_PTEP_CLEAR_FLUSH
 static inline pte_t ptep_clear_flush(struct vm_area_struct *vma,
                                     unsigned long address, pte_t *ptep)
 {
-        pte_t pte = *ptep;
+        pgste_t pgste;
-        ptep_invalidate(vma->vm_mm, address, ptep);
+        pte_t pte;
+        if (mm_has_pgste(vma->vm_mm))
+                pgste = pgste_get_lock(ptep);
+        pte = *ptep;
+        __ptep_ipte(address, ptep);
+        pte_val(*ptep) = _PAGE_TYPE_EMPTY;
+        if (mm_has_pgste(vma->vm_mm)) {
+                pgste = pgste_update_all(&pte, pgste);
+                pgste_set_unlock(ptep, pgste);
+        }
        return pte;
 }
@@ -953,76 +979,67 @@ static inline pte_t ptep_clear_flush(struct vm_area_struct *vma,
 */
 #define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL
 static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm,
-                                            unsigned long addr,
+                                            unsigned long address,
                                            pte_t *ptep, int full)
 {
-        pte_t pte = *ptep;
+        pgste_t pgste;
+        pte_t pte;
+        if (mm_has_pgste(mm))
+                pgste = pgste_get_lock(ptep);
+        pte = *ptep;
+        if (!full)
+                __ptep_ipte(address, ptep);
+        pte_val(*ptep) = _PAGE_TYPE_EMPTY;
-        if (full)
+        if (mm_has_pgste(mm)) {
-                pte_clear(mm, addr, ptep);
+                pgste = pgste_update_all(&pte, pgste);
-        else
+                pgste_set_unlock(ptep, pgste);
-                ptep_invalidate(mm, addr, ptep);
+        }
        return pte;
 }
 #define __HAVE_ARCH_PTEP_SET_WRPROTECT
-#define ptep_set_wrprotect(__mm, __addr, __ptep)                        \
+static inline pte_t ptep_set_wrprotect(struct mm_struct *mm,
-({                                                                      \
+                                       unsigned long address, pte_t *ptep)
-        pte_t __pte = *(__ptep);                                        \
+{
-        if (pte_write(__pte)) {                                         \
+        pgste_t pgste;
-                (__mm)->context.flush_mm = 1;                           \
+        pte_t pte = *ptep;
-                if (atomic_read(&(__mm)->context.attach_count) > 1 ||   \
-                    (__mm) != current->active_mm)                       \
-                        ptep_invalidate(__mm, __addr, __ptep);          \
-                set_pte_at(__mm, __addr, __ptep, pte_wrprotect(__pte)); \
-        }                                                               \
-})
-#define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
+        if (pte_write(pte)) {
-#define ptep_set_access_flags(__vma, __addr, __ptep, __entry, __dirty)  \
+                mm->context.flush_mm = 1;
-({                                                                      \
+                if (mm_has_pgste(mm))
-        int __changed = !pte_same(*(__ptep), __entry);                  \
+                        pgste = pgste_get_lock(ptep);
-        if (__changed) {                                                \
-                ptep_invalidate((__vma)->vm_mm, __addr, __ptep);        \
-                set_pte_at((__vma)->vm_mm, __addr, __ptep, __entry);    \
-        }                                                               \
-        __changed;                                                      \
-})
-/*
+                if (!mm_exclusive(mm))
- * Test and clear dirty bit in storage key.
+                        __ptep_ipte(address, ptep);
- * We can't clear the changed bit atomically. This is a potential
+                *ptep = pte_wrprotect(pte);
- * race against modification of the referenced bit. This function
- * should therefore only be called if it is not mapped in any
- * address space.
- */
-#define __HAVE_ARCH_PAGE_TEST_DIRTY
-static inline int page_test_dirty(struct page *page)
-{
-        return (page_get_storage_key(page_to_phys(page)) & _PAGE_CHANGED) != 0;
-}
-#define __HAVE_ARCH_PAGE_CLEAR_DIRTY
+                if (mm_has_pgste(mm))
-static inline void page_clear_dirty(struct page *page, int mapped)
+                        pgste_set_unlock(ptep, pgste);
-{
+        }
-        page_set_storage_key(page_to_phys(page), PAGE_DEFAULT_KEY, mapped);
+        return pte;
 }
-/*
+#define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
- * Test and clear referenced bit in storage key.
+static inline int ptep_set_access_flags(struct vm_area_struct *vma,
- */
+                                        unsigned long address, pte_t *ptep,
-#define __HAVE_ARCH_PAGE_TEST_AND_CLEAR_YOUNG
+                                        pte_t entry, int dirty)
-static inline int page_test_and_clear_young(struct page *page)
 {
-        unsigned long physpage = page_to_phys(page);
+        pgste_t pgste;
-        int ccode;
+        if (pte_same(*ptep, entry))
-        asm volatile(
+                return 0;
-                "       rrbe    0,%1\n"
+        if (mm_has_pgste(vma->vm_mm))
-                "       ipm     %0\n"
+                pgste = pgste_get_lock(ptep);
-                "       srl     %0,28\n"
-                : "=d" (ccode) : "a" (physpage) : "cc" );
+        __ptep_ipte(address, ptep);
-        return ccode & 2;
+        *ptep = entry;
+        if (mm_has_pgste(vma->vm_mm))
+                pgste_set_unlock(ptep, pgste);
+        return 1;
 }
 /*
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h
index 2c79b6416271..1300c3025334 100644
--- a/arch/s390/include/asm/processor.h
+++ b/arch/s390/include/asm/processor.h
@@ -84,6 +84,7 @@ struct thread_struct {
        struct per_event per_event;     /* Cause of the last PER trap */
        /* pfault_wait is used to block the process on a pfault event */
        unsigned long pfault_wait;
+        struct list_head list;
 };
 typedef struct thread_struct thread_struct;
diff --git a/arch/s390/include/asm/tlbflush.h b/arch/s390/include/asm/tlbflush.h
index 29d5d6d4becc..b7a4f2eb0057 100644
--- a/arch/s390/include/asm/tlbflush.h
+++ b/arch/s390/include/asm/tlbflush.h
@@ -50,7 +50,7 @@ static inline void __tlb_flush_full(struct mm_struct *mm)
        /*
         * If the process only ran on the local cpu, do a local flush.
         */
-        local_cpumask = cpumask_of_cpu(smp_processor_id());
+        cpumask_copy(&local_cpumask, cpumask_of(smp_processor_id()));
        if (cpumask_equal(mm_cpumask(mm), &local_cpumask))
                __tlb_flush_local();
        else
@@ -80,16 +80,11 @@ static inline void __tlb_flush_mm(struct mm_struct * mm)
         * on all cpus instead of doing a local flush if the mm
         * only ran on the local cpu.
         */
-        if (MACHINE_HAS_IDTE) {
+        if (MACHINE_HAS_IDTE)
-                if (mm->context.noexec)
-                        __tlb_flush_idte((unsigned long)
-                                         get_shadow_table(mm->pgd) |
-                                         mm->context.asce_bits);
                __tlb_flush_idte((unsigned long) mm->pgd |
                                 mm->context.asce_bits);
-                return;
+        else
-        }
+                __tlb_flush_full(mm);
-        __tlb_flush_full(mm);
 }
 static inline void __tlb_flush_mm_cond(struct mm_struct * mm)
diff --git a/arch/s390/include/asm/unistd.h b/arch/s390/include/asm/unistd.h
index e82152572377..9208e69245a0 100644
--- a/arch/s390/include/asm/unistd.h
+++ b/arch/s390/include/asm/unistd.h
@@ -385,6 +385,7 @@
 /* Ignore system calls that are also reachable via sys_socket */
 #define __IGNORE_recvmmsg
+#define __IGNORE_sendmmsg
 #define __ARCH_WANT_IPC_PARSE_VERSION
 #define __ARCH_WANT_OLD_READDIR
diff --git a/arch/s390/kernel/asm-offsets.c b/arch/s390/kernel/asm-offsets.c
index fe03c140002a..edfbd17d7082 100644
--- a/arch/s390/kernel/asm-offsets.c
+++ b/arch/s390/kernel/asm-offsets.c
@@ -124,13 +124,11 @@ int main(void)
        DEFINE(__LC_LAST_UPDATE_TIMER, offsetof(struct _lowcore, last_update_timer));
        DEFINE(__LC_LAST_UPDATE_CLOCK, offsetof(struct _lowcore, last_update_clock));
        DEFINE(__LC_CURRENT, offsetof(struct _lowcore, current_task));
+        DEFINE(__LC_CURRENT_PID, offsetof(struct _lowcore, current_pid));
        DEFINE(__LC_THREAD_INFO, offsetof(struct _lowcore, thread_info));
        DEFINE(__LC_KERNEL_STACK, offsetof(struct _lowcore, kernel_stack));
        DEFINE(__LC_ASYNC_STACK, offsetof(struct _lowcore, async_stack));
        DEFINE(__LC_PANIC_STACK, offsetof(struct _lowcore, panic_stack));
-        DEFINE(__LC_KERNEL_ASCE, offsetof(struct _lowcore, kernel_asce));
-        DEFINE(__LC_USER_ASCE, offsetof(struct _lowcore, user_asce));
-        DEFINE(__LC_USER_EXEC_ASCE, offsetof(struct _lowcore, user_exec_asce));
        DEFINE(__LC_INT_CLOCK, offsetof(struct _lowcore, int_clock));
        DEFINE(__LC_MCCK_CLOCK, offsetof(struct _lowcore, mcck_clock));
        DEFINE(__LC_MACHINE_FLAGS, offsetof(struct _lowcore, machine_flags));
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index 1b67fc6ebdc2..0476174dfff5 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -212,6 +212,7 @@ __switch_to:
        lctl    %c4,%c4,__TASK_pid(%r3)         # load pid to control reg. 4
        lm      %r6,%r15,__SF_GPRS(%r15)        # load gprs of next task
        st      %r3,__LC_CURRENT                # store task struct of next
+        mvc     __LC_CURRENT_PID(4,%r0),__TASK_pid(%r3) # store pid of next
        st      %r5,__LC_THREAD_INFO            # store thread info of next
        ahi     %r5,STACK_SIZE                  # end of kernel stack of next
        st      %r5,__LC_KERNEL_STACK           # store end of kernel stack
diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S
index 9fd864563499..d61967e2eab0 100644
--- a/arch/s390/kernel/entry64.S
+++ b/arch/s390/kernel/entry64.S
@@ -220,6 +220,7 @@ __switch_to:
        lctl    %c4,%c4,__TASK_pid(%r3)         # load pid to control reg. 4
        lmg     %r6,%r15,__SF_GPRS(%r15)        # load gprs of next task
        stg     %r3,__LC_CURRENT                # store task struct of next
+        mvc     __LC_CURRENT_PID+4(4,%r0),__TASK_pid(%r3) # store pid of next
        stg     %r5,__LC_THREAD_INFO            # store thread info of next
        aghi    %r5,STACK_SIZE                  # end of kernel stack of next
        stg     %r5,__LC_KERNEL_STACK           # store end of kernel stack
diff --git a/arch/s390/kernel/irq.c b/arch/s390/kernel/irq.c
index ea5099c9709c..e204f9597aaf 100644
--- a/arch/s390/kernel/irq.c
+++ b/arch/s390/kernel/irq.c
@@ -32,6 +32,7 @@ static const struct irq_class intrclass_names[] = {
        {.name = "VRT", .desc = "[EXT] Virtio" },
        {.name = "SCP", .desc = "[EXT] Service Call" },
        {.name = "IUC", .desc = "[EXT] IUCV" },
+        {.name = "CPM", .desc = "[EXT] CPU Measurement" },
        {.name = "QAI", .desc = "[I/O] QDIO Adapter Interrupt" },
        {.name = "QDI", .desc = "[I/O] QDIO Interrupt" },
        {.name = "DAS", .desc = "[I/O] DASD" },
diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c
index a895e69379f7..541a7509faeb 100644
--- a/arch/s390/kernel/process.c
+++ b/arch/s390/kernel/process.c
@@ -9,41 +9,26 @@
 #include <linux/compiler.h>
 #include <linux/cpu.h>
-#include <linux/errno.h>
 #include <linux/sched.h>
 #include <linux/kernel.h>
 #include <linux/mm.h>
-#include <linux/fs.h>
 #include <linux/smp.h>
-#include <linux/stddef.h>
 #include <linux/slab.h>
-#include <linux/unistd.h>
-#include <linux/ptrace.h>
-#include <linux/vmalloc.h>
-#include <linux/user.h>
 #include <linux/interrupt.h>
-#include <linux/delay.h>
-#include <linux/reboot.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/notifier.h>
 #include <linux/tick.h>
-#include <linux/elfcore.h>
-#include <linux/kernel_stat.h>
 #include <linux/personality.h>
 #include <linux/syscalls.h>
 #include <linux/compat.h>
 #include <linux/kprobes.h>
 #include <linux/random.h>
-#include <asm/compat.h>
+#include <linux/module.h>
-#include <asm/uaccess.h>
-#include <asm/pgtable.h>
 #include <asm/system.h>
 #include <asm/io.h>
 #include <asm/processor.h>
 #include <asm/irq.h>
 #include <asm/timer.h>
 #include <asm/nmi.h>
+#include <asm/compat.h>
 #include <asm/smp.h>
 #include "entry.h"
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index f5434d1ecb31..0c35dee10b00 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -305,8 +305,7 @@ static int set_amode_and_uaccess(unsigned long user_amode,
 */
 static int __init early_parse_switch_amode(char *p)
 {
-        if (user_mode != SECONDARY_SPACE_MODE)
+        user_mode = PRIMARY_SPACE_MODE;
-                user_mode = PRIMARY_SPACE_MODE;
        return 0;
 }
 early_param("switch_amode", early_parse_switch_amode);
@@ -315,10 +314,6 @@ static int __init early_parse_user_mode(char *p)
 {
        if (p && strcmp(p, "primary") == 0)
                user_mode = PRIMARY_SPACE_MODE;
-#ifdef CONFIG_S390_EXEC_PROTECT
-        else if (p && strcmp(p, "secondary") == 0)
-                user_mode = SECONDARY_SPACE_MODE;
-#endif
        else if (!p || strcmp(p, "home") == 0)
                user_mode = HOME_SPACE_MODE;
        else
@@ -327,31 +322,9 @@ static int __init early_parse_user_mode(char *p)
 }
 early_param("user_mode", early_parse_user_mode);
-#ifdef CONFIG_S390_EXEC_PROTECT
-/*
- * Enable execute protection?
- */
-static int __init early_parse_noexec(char *p)
-{
-        if (!strncmp(p, "off", 3))
-                return 0;
-        user_mode = SECONDARY_SPACE_MODE;
-        return 0;
-}
-early_param("noexec", early_parse_noexec);
-#endif /* CONFIG_S390_EXEC_PROTECT */
 static void setup_addressing_mode(void)
 {
-        if (user_mode == SECONDARY_SPACE_MODE) {
+        if (user_mode == PRIMARY_SPACE_MODE) {
-                if (set_amode_and_uaccess(PSW_ASC_SECONDARY,
-                                          PSW32_ASC_SECONDARY))
-                        pr_info("Execute protection active, "
-                                "mvcos available\n");
-                else
-                        pr_info("Execute protection active, "
-                                "mvcos not available\n");
-        } else if (user_mode == PRIMARY_SPACE_MODE) {
                if (set_amode_and_uaccess(PSW_ASC_PRIMARY, PSW32_ASC_PRIMARY))
                        pr_info("Address spaces switched, "
                                "mvcos available\n");
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 63c7d9ff220d..f8e85ecbc459 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -335,7 +335,7 @@ static int smp_rescan_cpus_sigp(cpumask_t avail)
                smp_cpu_polarization[logical_cpu] = POLARIZATION_UNKNWN;
                if (!cpu_stopped(logical_cpu))
                        continue;
-                cpu_set(logical_cpu, cpu_present_map);
+                set_cpu_present(logical_cpu, true);
                smp_cpu_state[logical_cpu] = CPU_STATE_CONFIGURED;
                logical_cpu = cpumask_next(logical_cpu, &avail);
                if (logical_cpu >= nr_cpu_ids)
@@ -367,7 +367,7 @@ static int smp_rescan_cpus_sclp(cpumask_t avail)
                        continue;
                __cpu_logical_map[logical_cpu] = cpu_id;
                smp_cpu_polarization[logical_cpu] = POLARIZATION_UNKNWN;
-                cpu_set(logical_cpu, cpu_present_map);
+                set_cpu_present(logical_cpu, true);
                if (cpu >= info->configured)
                        smp_cpu_state[logical_cpu] = CPU_STATE_STANDBY;
                else
@@ -385,7 +385,7 @@ static int __smp_rescan_cpus(void)
 {
        cpumask_t avail;
-        cpus_xor(avail, cpu_possible_map, cpu_present_map);
+        cpumask_xor(&avail, cpu_possible_mask, cpu_present_mask);
        if (smp_use_sigp_detection)
                return smp_rescan_cpus_sigp(avail);
        else
@@ -467,7 +467,7 @@ int __cpuinit start_secondary(void *cpuvoid)
        notify_cpu_starting(smp_processor_id());
        /* Mark this cpu as online */
        ipi_call_lock();
-        cpu_set(smp_processor_id(), cpu_online_map);
+        set_cpu_online(smp_processor_id(), true);
        ipi_call_unlock();
        /* Switch on interrupts */
        local_irq_enable();
@@ -644,7 +644,7 @@ int __cpu_disable(void)
        struct ec_creg_mask_parms cr_parms;
        int cpu = smp_processor_id();
-        cpu_clear(cpu, cpu_online_map);
+        set_cpu_online(cpu, false);
        /* Disable pfault pseudo page faults on this cpu. */
        pfault_fini();
@@ -654,8 +654,8 @@ int __cpu_disable(void)
        /* disable all external interrupts */
        cr_parms.orvals[0] = 0;
-        cr_parms.andvals[0] = ~(1 << 15 | 1 << 14 | 1 << 13 | 1 << 12 |
+        cr_parms.andvals[0] = ~(1 << 15 | 1 << 14 | 1 << 13 | 1 << 11 |
-                                1 << 11 | 1 << 10 | 1 <<  6 | 1 <<  4);
+                                1 << 10 | 1 <<  9 | 1 <<  6 | 1 <<  4);
        /* disable all I/O interrupts */
        cr_parms.orvals[6] = 0;
        cr_parms.andvals[6] = ~(1 << 31 | 1 << 30 | 1 << 29 | 1 << 28 |
@@ -681,7 +681,7 @@ void __cpu_die(unsigned int cpu)
        atomic_dec(&init_mm.context.attach_count);
 }
-void cpu_die(void)
+void __noreturn cpu_die(void)
 {
        idle_task_exit();
        while (sigp(smp_processor_id(), sigp_stop) == sigp_busy)
@@ -738,8 +738,8 @@ void __init smp_prepare_boot_cpu(void)
        BUG_ON(smp_processor_id() != 0);
        current_thread_info()->cpu = 0;
-        cpu_set(0, cpu_present_map);
+        set_cpu_present(0, true);
-        cpu_set(0, cpu_online_map);
+        set_cpu_online(0, true);
        S390_lowcore.percpu_offset = __per_cpu_offset[0];
        current_set[0] = current;
        smp_cpu_state[0] = CPU_STATE_CONFIGURED;
@@ -1016,21 +1016,21 @@ int __ref smp_rescan_cpus(void)
        get_online_cpus();
        mutex_lock(&smp_cpu_state_mutex);
-        newcpus = cpu_present_map;
+        cpumask_copy(&newcpus, cpu_present_mask);
        rc = __smp_rescan_cpus();
        if (rc)
                goto out;
-        cpus_andnot(newcpus, cpu_present_map, newcpus);
+        cpumask_andnot(&newcpus, cpu_present_mask, &newcpus);
-        for_each_cpu_mask(cpu, newcpus) {
+        for_each_cpu(cpu, &newcpus) {
                rc = smp_add_present_cpu(cpu);
                if (rc)
-                        cpu_clear(cpu, cpu_present_map);
+                        set_cpu_present(cpu, false);
        }
        rc = 0;
 out:
        mutex_unlock(&smp_cpu_state_mutex);
        put_online_cpus();
-        if (!cpus_empty(newcpus))
+        if (!cpumask_empty(&newcpus))
                topology_schedule_update();
        return rc;
 }
diff --git a/arch/s390/kernel/time.c b/arch/s390/kernel/time.c
index 87be655557aa..a59557f1fb5f 100644
--- a/arch/s390/kernel/time.c
+++ b/arch/s390/kernel/time.c
@@ -810,7 +810,7 @@ static int etr_sync_clock_stop(struct etr_aib *aib, int port)
        etr_sync.etr_port = port;
        get_online_cpus();
        atomic_set(&etr_sync.cpus, num_online_cpus() - 1);
-        rc = stop_machine(etr_sync_clock, &etr_sync, &cpu_online_map);
+        rc = stop_machine(etr_sync_clock, &etr_sync, cpu_online_mask);
        put_online_cpus();
        return rc;
 }
@@ -1579,7 +1579,7 @@ static void stp_work_fn(struct work_struct *work)
        memset(&stp_sync, 0, sizeof(stp_sync));
        get_online_cpus();
        atomic_set(&stp_sync.cpus, num_online_cpus() - 1);
-        stop_machine(stp_sync_clock, &stp_sync, &cpu_online_map);
+        stop_machine(stp_sync_clock, &stp_sync, cpu_online_mask);
        put_online_cpus();
        if (!check_sync_clock())
diff --git a/arch/s390/kernel/topology.c b/arch/s390/kernel/topology.c
index 94b06c31fc8a..2eafb8c7a746 100644
--- a/arch/s390/kernel/topology.c
+++ b/arch/s390/kernel/topology.c
@@ -52,20 +52,20 @@ static cpumask_t cpu_group_map(struct mask_info *info, unsigned int cpu)
 {
        cpumask_t mask;
-        cpus_clear(mask);
+        cpumask_clear(&mask);
        if (!topology_enabled || !MACHINE_HAS_TOPOLOGY) {
                cpumask_copy(&mask, cpumask_of(cpu));
                return mask;
        }
        while (info) {
-                if (cpu_isset(cpu, info->mask)) {
+                if (cpumask_test_cpu(cpu, &info->mask)) {
                        mask = info->mask;
                        break;
                }
                info = info->next;
        }
-        if (cpus_empty(mask))
+        if (cpumask_empty(&mask))
-                mask = cpumask_of_cpu(cpu);
+                cpumask_copy(&mask, cpumask_of(cpu));
        return mask;
 }
@@ -85,10 +85,10 @@ static void add_cpus_to_mask(struct topology_cpu *tl_cpu,
                        if (cpu_logical_map(lcpu) != rcpu)
                                continue;
 #ifdef CONFIG_SCHED_BOOK
-                        cpu_set(lcpu, book->mask);
+                        cpumask_set_cpu(lcpu, &book->mask);
                        cpu_book_id[lcpu] = book->id;
 #endif
-                        cpu_set(lcpu, core->mask);
+                        cpumask_set_cpu(lcpu, &core->mask);
                        cpu_core_id[lcpu] = core->id;
                        smp_cpu_polarization[lcpu] = tl_cpu->pp;
                }
@@ -101,13 +101,13 @@ static void clear_masks(void)
        info = &core_info;
        while (info) {
-                cpus_clear(info->mask);
+                cpumask_clear(&info->mask);
                info = info->next;
        }
 #ifdef CONFIG_SCHED_BOOK
        info = &book_info;
        while (info) {
-                cpus_clear(info->mask);
+                cpumask_clear(&info->mask);
                info = info->next;
        }
 #endif
diff --git a/arch/s390/kernel/vdso32/Makefile b/arch/s390/kernel/vdso32/Makefile
index d13e8755a8cc..8ad2b34ad151 100644
--- a/arch/s390/kernel/vdso32/Makefile
+++ b/arch/s390/kernel/vdso32/Makefile
@@ -22,6 +22,9 @@ obj-y += vdso32_wrapper.o
 extra-y += vdso32.lds
 CPPFLAGS_vdso32.lds += -P -C -U$(ARCH)
+# Disable gcov profiling for VDSO code
+GCOV_PROFILE := n
 # Force dependency (incbin is bad)
 $(obj)/vdso32_wrapper.o : $(obj)/vdso32.so
diff --git a/arch/s390/kernel/vdso64/Makefile b/arch/s390/kernel/vdso64/Makefile
index 449352dda9cd..2a8ddfd12a5b 100644
--- a/arch/s390/kernel/vdso64/Makefile
+++ b/arch/s390/kernel/vdso64/Makefile
@@ -22,6 +22,9 @@ obj-y += vdso64_wrapper.o
 extra-y += vdso64.lds
 CPPFLAGS_vdso64.lds += -P -C -U$(ARCH)
+# Disable gcov profiling for VDSO code
+GCOV_PROFILE := n
 # Force dependency (incbin is bad)
 $(obj)/vdso64_wrapper.o : $(obj)/vdso64.so
diff --git a/arch/s390/mm/extmem.c b/arch/s390/mm/extmem.c
index 3cc95dd0a3a6..075ddada4911 100644
--- a/arch/s390/mm/extmem.c
+++ b/arch/s390/mm/extmem.c
@@ -412,6 +412,7 @@ __segment_load (char *name, int do_nonshared, unsigned long *addr, unsigned long
        struct dcss_segment *seg;
        int rc, diag_cc;
+        start_addr = end_addr = 0;
        seg = kmalloc(sizeof(*seg), GFP_KERNEL | GFP_DMA);
        if (seg == NULL) {
                rc = -ENOMEM;
@@ -573,6 +574,7 @@ segment_modify_shared (char *name, int do_nonshared)
        unsigned long start_addr, end_addr, dummy;
        int rc, diag_cc;
+        start_addr = end_addr = 0;
        mutex_lock(&dcss_lock);
        seg = segment_by_name (name);
        if (seg == NULL) {
@@ -681,8 +683,6 @@ void
 segment_save(char *name)
 {
        struct dcss_segment *seg;
-        int startpfn = 0;
-        int endpfn = 0;
        char cmd1[160];
        char cmd2[80];
        int i, response;
@@ -698,8 +698,6 @@ segment_save(char *name)
                goto out;
        }
-        startpfn = seg->start_addr >> PAGE_SHIFT;
-        endpfn = (seg->end) >> PAGE_SHIFT;
        sprintf(cmd1, "DEFSEG %s", name);
        for (i=0; i<seg->segcnt; i++) {
                sprintf(cmd1+strlen(cmd1), " %lX-%lX %s",
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c
index ab988135e5c6..a0f9e730f26a 100644
--- a/arch/s390/mm/fault.c
+++ b/arch/s390/mm/fault.c
@@ -225,33 +225,6 @@ static noinline void do_sigbus(struct pt_regs *regs, long int_code,
        force_sig_info(SIGBUS, &si, tsk);
 }
-#ifdef CONFIG_S390_EXEC_PROTECT
-static noinline int signal_return(struct pt_regs *regs, long int_code,
-                                  unsigned long trans_exc_code)
-{
-        u16 instruction;
-        int rc;
-        rc = __get_user(instruction, (u16 __user *) regs->psw.addr);
-        if (!rc && instruction == 0x0a77) {
-                clear_tsk_thread_flag(current, TIF_PER_TRAP);
-                if (is_compat_task())
-                        sys32_sigreturn();
-                else
-                        sys_sigreturn();
-        } else if (!rc && instruction == 0x0aad) {
-                clear_tsk_thread_flag(current, TIF_PER_TRAP);
-                if (is_compat_task())
-                        sys32_rt_sigreturn();
-                else
-                        sys_rt_sigreturn();
-        } else
-                do_sigsegv(regs, int_code, SEGV_MAPERR, trans_exc_code);
-        return 0;
-}
-#endif /* CONFIG_S390_EXEC_PROTECT */
 static noinline void do_fault_error(struct pt_regs *regs, long int_code,
                                    unsigned long trans_exc_code, int fault)
 {
@@ -259,13 +232,6 @@ static noinline void do_fault_error(struct pt_regs *regs, long int_code,
        switch (fault) {
        case VM_FAULT_BADACCESS:
-#ifdef CONFIG_S390_EXEC_PROTECT
-                if ((regs->psw.mask & PSW_MASK_ASC) == PSW_ASC_SECONDARY &&
-                    (trans_exc_code & 3) == 0) {
-                        signal_return(regs, int_code, trans_exc_code);
-                        break;
-                }
-#endif /* CONFIG_S390_EXEC_PROTECT */
        case VM_FAULT_BADMAP:
                /* Bad memory access. Check if it is kernel or user space. */
                if (regs->psw.mask & PSW_MASK_PSTATE) {
@@ -414,11 +380,6 @@ void __kprobes do_dat_exception(struct pt_regs *regs, long pgm_int_code,
        int access, fault;
        access = VM_READ | VM_EXEC | VM_WRITE;
-#ifdef CONFIG_S390_EXEC_PROTECT
-        if ((regs->psw.mask & PSW_MASK_ASC) == PSW_ASC_SECONDARY &&
-            (trans_exc_code & 3) == 0)
-                access = VM_EXEC;
-#endif
        fault = do_exception(regs, access, trans_exc_code);
        if (unlikely(fault))
                do_fault_error(regs, pgm_int_code & 255, trans_exc_code, fault);
@@ -491,22 +452,28 @@ static int __init nopfault(char *str)
 __setup("nopfault", nopfault);
-typedef struct {
+struct pfault_refbk {
-        __u16 refdiagc;
+        u16 refdiagc;
-        __u16 reffcode;
+        u16 reffcode;
-        __u16 refdwlen;
+        u16 refdwlen;
-        __u16 refversn;
+        u16 refversn;
-        __u64 refgaddr;
+        u64 refgaddr;
-        __u64 refselmk;
+        u64 refselmk;
-        __u64 refcmpmk;
+        u64 refcmpmk;
-        __u64 reserved;
+        u64 reserved;
-} __attribute__ ((packed, aligned(8))) pfault_refbk_t;
+} __attribute__ ((packed, aligned(8)));
 int pfault_init(void)
 {
-        pfault_refbk_t refbk =
+        struct pfault_refbk refbk = {
-                { 0x258, 0, 5, 2, __LC_CURRENT, 1ULL << 48, 1ULL << 48,
+                .refdiagc = 0x258,
-                  __PF_RES_FIELD };
+                .reffcode = 0,
+                .refdwlen = 5,
+                .refversn = 2,
+                .refgaddr = __LC_CURRENT_PID,
+                .refselmk = 1ULL << 48,
+                .refcmpmk = 1ULL << 48,
+                .reserved = __PF_RES_FIELD };
        int rc;
        if (!MACHINE_IS_VM || pfault_disable)
@@ -524,8 +491,12 @@ int pfault_init(void)
 void pfault_fini(void)
 {
-        pfault_refbk_t refbk =
+        struct pfault_refbk refbk = {
-        { 0x258, 1, 5, 2, 0ULL, 0ULL, 0ULL, 0ULL };
+                .refdiagc = 0x258,
+                .reffcode = 1,
+                .refdwlen = 5,
+                .refversn = 2,
+        };
        if (!MACHINE_IS_VM || pfault_disable)
                return;
@@ -537,11 +508,15 @@ void pfault_fini(void)
                : : "a" (&refbk), "m" (refbk) : "cc");
 }
+static DEFINE_SPINLOCK(pfault_lock);
+static LIST_HEAD(pfault_list);
 static void pfault_interrupt(unsigned int ext_int_code,
                             unsigned int param32, unsigned long param64)
 {
        struct task_struct *tsk;
        __u16 subcode;
+        pid_t pid;
        /*
         * Get the external interruption subcode & pfault
@@ -553,44 +528,79 @@ static void pfault_interrupt(unsigned int ext_int_code,
        if ((subcode & 0xff00) != __SUBCODE_MASK)
                return;
        kstat_cpu(smp_processor_id()).irqs[EXTINT_PFL]++;
+        if (subcode & 0x0080) {
-        /*
+                /* Get the token (= pid of the affected task). */
-         * Get the token (= address of the task structure of the affected task).
+                pid = sizeof(void *) == 4 ? param32 : param64;
-         */
+                rcu_read_lock();
-#ifdef CONFIG_64BIT
+                tsk = find_task_by_pid_ns(pid, &init_pid_ns);
-        tsk = (struct task_struct *) param64;
+                if (tsk)
-#else
+                        get_task_struct(tsk);
-        tsk = (struct task_struct *) param32;
+                rcu_read_unlock();
-#endif
+                if (!tsk)
+                        return;
+        } else {
+                tsk = current;
+        }
+        spin_lock(&pfault_lock);
        if (subcode & 0x0080) {
                /* signal bit is set -> a page has been swapped in by VM */
-                if (xchg(&tsk->thread.pfault_wait, -1) != 0) {
+                if (tsk->thread.pfault_wait == 1) {
                        /* Initial interrupt was faster than the completion
                         * interrupt. pfault_wait is valid. Set pfault_wait
                         * back to zero and wake up the process. This can
                         * safely be done because the task is still sleeping
                         * and can't produce new pfaults. */
                        tsk->thread.pfault_wait = 0;
+                        list_del(&tsk->thread.list);
                        wake_up_process(tsk);
-                        put_task_struct(tsk);
+                } else {
+                        /* Completion interrupt was faster than initial
+                         * interrupt. Set pfault_wait to -1 so the initial
+                         * interrupt doesn't put the task to sleep. */
+                        tsk->thread.pfault_wait = -1;
                }
+                put_task_struct(tsk);
        } else {
                /* signal bit not set -> a real page is missing. */
-                get_task_struct(tsk);
+                if (tsk->thread.pfault_wait == -1) {
-                set_task_state(tsk, TASK_UNINTERRUPTIBLE);
-                if (xchg(&tsk->thread.pfault_wait, 1) != 0) {
                        /* Completion interrupt was faster than the initial
-                         * interrupt (swapped in a -1 for pfault_wait). Set
+                         * interrupt (pfault_wait == -1). Set pfault_wait
-                         * pfault_wait back to zero and exit. This can be
+                         * back to zero and exit. */
-                         * done safely because tsk is running in kernel 
-                         * mode and can't produce new pfaults. */
                        tsk->thread.pfault_wait = 0;
-                        set_task_state(tsk, TASK_RUNNING);
+                } else {
-                        put_task_struct(tsk);
+                        /* Initial interrupt arrived before completion
-                } else
+                         * interrupt. Let the task sleep. */
+                        tsk->thread.pfault_wait = 1;
+                        list_add(&tsk->thread.list, &pfault_list);
+                        set_task_state(tsk, TASK_UNINTERRUPTIBLE);
                        set_tsk_need_resched(tsk);
+                }
+        }
+        spin_unlock(&pfault_lock);
+}
+static int __cpuinit pfault_cpu_notify(struct notifier_block *self,
+                                       unsigned long action, void *hcpu)
+{
+        struct thread_struct *thread, *next;
+        struct task_struct *tsk;
+        switch (action) {
+        case CPU_DEAD:
+        case CPU_DEAD_FROZEN:
+                spin_lock_irq(&pfault_lock);
+                list_for_each_entry_safe(thread, next, &pfault_list, list) {
+                        thread->pfault_wait = 0;
+                        list_del(&thread->list);
+                        tsk = container_of(thread, struct task_struct, thread);
+                        wake_up_process(tsk);
+                }
+                spin_unlock_irq(&pfault_lock);
+                break;
+        default:
+                break;
        }
+        return NOTIFY_OK;
 }
 static int __init pfault_irq_init(void)
@@ -599,22 +609,21 @@ static int __init pfault_irq_init(void)
        if (!MACHINE_IS_VM)
                return 0;
-        /*
-         * Try to get pfault pseudo page faults going.
-         */
        rc = register_external_interrupt(0x2603, pfault_interrupt);
-        if (rc) {
+        if (rc)
-                pfault_disable = 1;
+                goto out_extint;
-                return rc;
+        rc = pfault_init() == 0 ? 0 : -EOPNOTSUPP;
-        }
+        if (rc)
-        if (pfault_init() == 0)
+                goto out_pfault;
-                return 0;
+        hotcpu_notifier(pfault_cpu_notify, 0);
+        return 0;
-        /* Tough luck, no pfault. */
+out_pfault:
-        pfault_disable = 1;
        unregister_external_interrupt(0x2603, pfault_interrupt);
-        return 0;
+out_extint:
+        pfault_disable = 1;
+        return rc;
 }
 early_initcall(pfault_irq_init);
-#endif
+#endif /* CONFIG_PFAULT */
diff --git a/arch/s390/mm/hugetlbpage.c b/arch/s390/mm/hugetlbpage.c
index 639cd21f2218..a4d856db9154 100644
--- a/arch/s390/mm/hugetlbpage.c
+++ b/arch/s390/mm/hugetlbpage.c
@@ -13,7 +13,6 @@ void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
                                   pte_t *pteptr, pte_t pteval)
 {
        pmd_t *pmdp = (pmd_t *) pteptr;
-        pte_t shadow_pteval = pteval;
        unsigned long mask;
        if (!MACHINE_HAS_HPAGE) {
@@ -21,18 +20,9 @@ void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
                mask = pte_val(pteval) &
                                (_SEGMENT_ENTRY_INV | _SEGMENT_ENTRY_RO);
                pte_val(pteval) = (_SEGMENT_ENTRY + __pa(pteptr)) | mask;
-                if (mm->context.noexec) {
-                        pteptr += PTRS_PER_PTE;
-                        pte_val(shadow_pteval) =
-                                        (_SEGMENT_ENTRY + __pa(pteptr)) | mask;
-                }
        }
        pmd_val(*pmdp) = pte_val(pteval);
-        if (mm->context.noexec) {
-                pmdp = get_shadow_table(pmdp);
-                pmd_val(*pmdp) = pte_val(shadow_pteval);
-        }
 }
 int arch_prepare_hugepage(struct page *page)
diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c
index bb409332a484..dfefc2171691 100644
--- a/arch/s390/mm/init.c
+++ b/arch/s390/mm/init.c
@@ -175,7 +175,8 @@ void kernel_map_pages(struct page *page, int numpages, int enable)
                pmd = pmd_offset(pud, address);
                pte = pte_offset_kernel(pmd, address);
                if (!enable) {
-                        ptep_invalidate(&init_mm, address, pte);
+                        __ptep_ipte(address, pte);
+                        pte_val(*pte) = _PAGE_TYPE_EMPTY;
                        continue;
                }
                *pte = mk_pte_phys(address, __pgprot(_PAGE_TYPE_RW));
diff --git a/arch/s390/mm/pageattr.c b/arch/s390/mm/pageattr.c
index f05edcc3beff..d013ed39743b 100644
--- a/arch/s390/mm/pageattr.c
+++ b/arch/s390/mm/pageattr.c
@@ -28,7 +28,7 @@ static void change_page_attr(unsigned long addr, int numpages,
                pte = *ptep;
                pte = set(pte);
-                ptep_invalidate(&init_mm, addr, ptep);
+                __ptep_ipte(addr, ptep);
                *ptep = pte;
                addr += PAGE_SIZE;
        }
diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c
index e1850c28cd68..8d4330642512 100644
--- a/arch/s390/mm/pgtable.c
+++ b/arch/s390/mm/pgtable.c
@@ -40,7 +40,6 @@ DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
 static DEFINE_PER_CPU(struct rcu_table_freelist *, rcu_table_freelist);
 static void __page_table_free(struct mm_struct *mm, unsigned long *table);
-static void __crst_table_free(struct mm_struct *mm, unsigned long *table);
 static struct rcu_table_freelist *rcu_table_freelist_get(struct mm_struct *mm)
 {
@@ -67,7 +66,7 @@ static void rcu_table_freelist_callback(struct rcu_head *head)
        while (batch->pgt_index > 0)
                __page_table_free(batch->mm, batch->table[--batch->pgt_index]);
        while (batch->crst_index < RCU_FREELIST_SIZE)
-                __crst_table_free(batch->mm, batch->table[batch->crst_index++]);
+                crst_table_free(batch->mm, batch->table[batch->crst_index++]);
        free_page((unsigned long) batch);
 }
@@ -125,63 +124,33 @@ static int __init parse_vmalloc(char *arg)
 }
 early_param("vmalloc", parse_vmalloc);
-unsigned long *crst_table_alloc(struct mm_struct *mm, int noexec)
+unsigned long *crst_table_alloc(struct mm_struct *mm)
 {
        struct page *page = alloc_pages(GFP_KERNEL, ALLOC_ORDER);
        if (!page)
                return NULL;
-        page->index = 0;
-        if (noexec) {
-                struct page *shadow = alloc_pages(GFP_KERNEL, ALLOC_ORDER);
-                if (!shadow) {
-                        __free_pages(page, ALLOC_ORDER);
-                        return NULL;
-                }
-                page->index = page_to_phys(shadow);
-        }
-        spin_lock_bh(&mm->context.list_lock);
-        list_add(&page->lru, &mm->context.crst_list);
-        spin_unlock_bh(&mm->context.list_lock);
        return (unsigned long *) page_to_phys(page);
 }
-static void __crst_table_free(struct mm_struct *mm, unsigned long *table)
-{
-        unsigned long *shadow = get_shadow_table(table);
-        if (shadow)
-                free_pages((unsigned long) shadow, ALLOC_ORDER);
-        free_pages((unsigned long) table, ALLOC_ORDER);
-}
 void crst_table_free(struct mm_struct *mm, unsigned long *table)
 {
-        struct page *page = virt_to_page(table);
+        free_pages((unsigned long) table, ALLOC_ORDER);
-        spin_lock_bh(&mm->context.list_lock);
-        list_del(&page->lru);
-        spin_unlock_bh(&mm->context.list_lock);
-        __crst_table_free(mm, table);
 }
 void crst_table_free_rcu(struct mm_struct *mm, unsigned long *table)
 {
        struct rcu_table_freelist *batch;
-        struct page *page = virt_to_page(table);
-        spin_lock_bh(&mm->context.list_lock);
-        list_del(&page->lru);
-        spin_unlock_bh(&mm->context.list_lock);
        if (atomic_read(&mm->mm_users) < 2 &&
            cpumask_equal(mm_cpumask(mm), cpumask_of(smp_processor_id()))) {
-                __crst_table_free(mm, table);
+                crst_table_free(mm, table);
                return;
        }
        batch = rcu_table_freelist_get(mm);
        if (!batch) {
                smp_call_function(smp_sync, NULL, 1);
-                __crst_table_free(mm, table);
+                crst_table_free(mm, table);
                return;
        }
        batch->table[--batch->crst_index] = table;
@@ -197,7 +166,7 @@ int crst_table_upgrade(struct mm_struct *mm, unsigned long limit)
        BUG_ON(limit > (1UL << 53));
 repeat:
-        table = crst_table_alloc(mm, mm->context.noexec);
+        table = crst_table_alloc(mm);
        if (!table)
                return -ENOMEM;
        spin_lock_bh(&mm->page_table_lock);
@@ -273,7 +242,7 @@ unsigned long *page_table_alloc(struct mm_struct *mm)
        unsigned long *table;
        unsigned long bits;
-        bits = (mm->context.noexec || mm->context.has_pgste) ? 3UL : 1UL;
+        bits = (mm->context.has_pgste) ? 3UL : 1UL;
        spin_lock_bh(&mm->context.list_lock);
        page = NULL;
        if (!list_empty(&mm->context.pgtable_list)) {
@@ -329,7 +298,7 @@ void page_table_free(struct mm_struct *mm, unsigned long *table)
        struct page *page;
        unsigned long bits;
-        bits = (mm->context.noexec || mm->context.has_pgste) ? 3UL : 1UL;
+        bits = (mm->context.has_pgste) ? 3UL : 1UL;
        bits <<= (__pa(table) & (PAGE_SIZE - 1)) / 256 / sizeof(unsigned long);
        page = pfn_to_page(__pa(table) >> PAGE_SHIFT);
        spin_lock_bh(&mm->context.list_lock);
@@ -366,7 +335,7 @@ void page_table_free_rcu(struct mm_struct *mm, unsigned long *table)
                page_table_free(mm, table);
                return;
        }
-        bits = (mm->context.noexec || mm->context.has_pgste) ? 3UL : 1UL;
+        bits = (mm->context.has_pgste) ? 3UL : 1UL;
        bits <<= (__pa(table) & (PAGE_SIZE - 1)) / 256 / sizeof(unsigned long);
        page = pfn_to_page(__pa(table) >> PAGE_SHIFT);
        spin_lock_bh(&mm->context.list_lock);
@@ -379,25 +348,6 @@ void page_table_free_rcu(struct mm_struct *mm, unsigned long *table)
                rcu_table_freelist_finish();
 }
-void disable_noexec(struct mm_struct *mm, struct task_struct *tsk)
-{
-        struct page *page;
-        spin_lock_bh(&mm->context.list_lock);
-        /* Free shadow region and segment tables. */
-        list_for_each_entry(page, &mm->context.crst_list, lru)
-                if (page->index) {
-                        free_pages((unsigned long) page->index, ALLOC_ORDER);
-                        page->index = 0;
-                }
-        /* "Free" second halves of page tables. */
-        list_for_each_entry(page, &mm->context.pgtable_list, lru)
-                page->flags &= ~SECOND_HALVES;
-        spin_unlock_bh(&mm->context.list_lock);
-        mm->context.noexec = 0;
-        update_mm(mm, tsk);
-}
 /*
 * switch on pgstes for its userspace process (for kvm)
 */
diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c
index 34c43f23b28c..8c1970d1dd91 100644
--- a/arch/s390/mm/vmem.c
+++ b/arch/s390/mm/vmem.c
@@ -95,7 +95,7 @@ static int vmem_add_mem(unsigned long start, unsigned long size, int ro)
                        pu_dir = vmem_pud_alloc();
                        if (!pu_dir)
                                goto out;
-                        pgd_populate_kernel(&init_mm, pg_dir, pu_dir);
+                        pgd_populate(&init_mm, pg_dir, pu_dir);
                }
                pu_dir = pud_offset(pg_dir, address);
@@ -103,7 +103,7 @@ static int vmem_add_mem(unsigned long start, unsigned long size, int ro)
                        pm_dir = vmem_pmd_alloc();
                        if (!pm_dir)
                                goto out;
-                        pud_populate_kernel(&init_mm, pu_dir, pm_dir);
+                        pud_populate(&init_mm, pu_dir, pm_dir);
                }
                pte = mk_pte_phys(address, __pgprot(ro ? _PAGE_RO : 0));
@@ -123,7 +123,7 @@ static int vmem_add_mem(unsigned long start, unsigned long size, int ro)
                        pt_dir = vmem_pte_alloc();
                        if (!pt_dir)
                                goto out;
-                        pmd_populate_kernel(&init_mm, pm_dir, pt_dir);
+                        pmd_populate(&init_mm, pm_dir, pt_dir);
                }
                pt_dir = pte_offset_kernel(pm_dir, address);
@@ -159,7 +159,7 @@ static void vmem_remove_range(unsigned long start, unsigned long size)
                        continue;
                if (pmd_huge(*pm_dir)) {
-                        pmd_clear_kernel(pm_dir);
+                        pmd_clear(pm_dir);
                        address += HPAGE_SIZE - PAGE_SIZE;
                        continue;
                }
@@ -192,7 +192,7 @@ int __meminit vmemmap_populate(struct page *start, unsigned long nr, int node)
                        pu_dir = vmem_pud_alloc();
                        if (!pu_dir)
                                goto out;
-                        pgd_populate_kernel(&init_mm, pg_dir, pu_dir);
+                        pgd_populate(&init_mm, pg_dir, pu_dir);
                }
                pu_dir = pud_offset(pg_dir, address);
@@ -200,7 +200,7 @@ int __meminit vmemmap_populate(struct page *start, unsigned long nr, int node)
                        pm_dir = vmem_pmd_alloc();
                        if (!pm_dir)
                                goto out;
-                        pud_populate_kernel(&init_mm, pu_dir, pm_dir);
+                        pud_populate(&init_mm, pu_dir, pm_dir);
                }
                pm_dir = pmd_offset(pu_dir, address);
@@ -208,7 +208,7 @@ int __meminit vmemmap_populate(struct page *start, unsigned long nr, int node)
                        pt_dir = vmem_pte_alloc();
                        if (!pt_dir)
                                goto out;
-                        pmd_populate_kernel(&init_mm, pm_dir, pt_dir);
+                        pmd_populate(&init_mm, pm_dir, pt_dir);
                }
                pt_dir = pte_offset_kernel(pm_dir, address);
diff --git a/arch/s390/oprofile/hwsampler.c b/arch/s390/oprofile/hwsampler.c
index 33cbd373cce4..053caa0fd276 100644
--- a/arch/s390/oprofile/hwsampler.c
+++ b/arch/s390/oprofile/hwsampler.c
@@ -5,6 +5,7 @@
 * Author: Heinz Graalfs <graalfs@de.ibm.com>
 */
+#include <linux/kernel_stat.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/smp.h>
@@ -674,17 +675,11 @@ int hwsampler_activate(unsigned int cpu)
 static void hws_ext_handler(unsigned int ext_int_code,
                            unsigned int param32, unsigned long param64)
 {
-        int cpu;
        struct hws_cpu_buffer *cb;
-        cpu = smp_processor_id();
+        kstat_cpu(smp_processor_id()).irqs[EXTINT_CPM]++;
-        cb = &per_cpu(sampler_cpu_buffer, cpu);
+        cb = &__get_cpu_var(sampler_cpu_buffer);
+        atomic_xchg(&cb->ext_params, atomic_read(&cb->ext_params) | param32);
-        atomic_xchg(
-                        &cb->ext_params,
-                        atomic_read(&cb->ext_params)
-                                | S390_lowcore.ext_params);
        if (hws_wq)
                queue_work(hws_wq, &cb->worker);
 }
@@ -764,7 +759,7 @@ static int worker_check_error(unsigned int cpu, int ext_params)
        if (!sdbt || !*sdbt)
                return -EINVAL;
-        if (ext_params & EI_IEA)
+        if (ext_params & EI_PRA)
                cb->req_alert++;
        if (ext_params & EI_LSDA)
@@ -1009,7 +1004,7 @@ int hwsampler_deallocate()
        if (hws_state != HWS_STOPPED)
                goto deallocate_exit;
-        smp_ctl_clear_bit(0, 5); /* set bit 58 CR0 off */
+        ctl_clear_bit(0, 5); /* set bit 58 CR0 off */
        deallocate_sdbt();
        hws_state = HWS_DEALLOCATED;
@@ -1123,7 +1118,7 @@ int hwsampler_shutdown()
                mutex_lock(&hws_sem);
                if (hws_state == HWS_STOPPED) {
-                        smp_ctl_clear_bit(0, 5); /* set bit 58 CR0 off */
+                        ctl_clear_bit(0, 5); /* set bit 58 CR0 off */
                        deallocate_sdbt();
                }
                if (hws_wq) {
@@ -1198,7 +1193,7 @@ start_all_exit:
        hws_oom = 1;
        hws_flush_all = 0;
        /* now let them in, 1407 CPUMF external interrupts */
-        smp_ctl_set_bit(0, 5); /* set CR0 bit 58 */
+        ctl_set_bit(0, 5); /* set CR0 bit 58 */
        return 0;
 }
author	Linus Torvalds <torvalds@linux-foundation.org>	2011-05-24 15:06:02 -0400
committer	Linus Torvalds <torvalds@linux-foundation.org>	2011-05-24 15:06:02 -0400
commit	0d66cba1ac3ad38614077443d604d6a09cec99de (patch)
tree	383981fd93c7e6d467fb239edd51f935f1a481dd /arch/s390
parent	4637f40f200063973553ce3c4c1ac6c247e4535c (diff)
parent	5bd418784a2764a8d9de177a5462bfc008fd334a (diff)