18 files changed, 85 insertions, 146 deletions

diff --git a/arch/s390/include/asm/archrandom.h b/arch/s390/include/asm/archrandom.h
index de61ce562052..5dc712fde3c7 100644
--- a/arch/s390/include/asm/archrandom.h
+++ b/arch/s390/include/asm/archrandom.h
@@ -2,7 +2,7 @@
 /*
  * Kernel interface for the s390 arch_random_* functions
  *
- * Copyright IBM Corp. 2017
+ * Copyright IBM Corp. 2017, 2020
  *
  * Author: Harald Freudenberger <freude@de.ibm.com>
  *
@@ -19,10 +19,13 @@
 DECLARE_STATIC_KEY_FALSE(s390_arch_random_available);
 extern atomic64_t s390_arch_random_counter;
 
+bool s390_arch_get_random_long(unsigned long *v);
 bool s390_arch_random_generate(u8 *buf, unsigned int nbytes);
 
 static inline bool __must_check arch_get_random_long(unsigned long *v)
 {
+	if (static_branch_likely(&s390_arch_random_available))
+		return s390_arch_get_random_long(v);
 	return false;
 }
 
diff --git a/arch/s390/include/asm/ccwdev.h b/arch/s390/include/asm/ccwdev.h
index c0be5fe1ddba..e3e2ab0acf83 100644
--- a/arch/s390/include/asm/ccwdev.h
+++ b/arch/s390/include/asm/ccwdev.h
@@ -115,7 +115,7 @@ enum uc_todo {
 };
 
 /**
- * struct ccw driver - device driver for channel attached devices
+ * struct ccw_driver - device driver for channel attached devices
  * @ids: ids supported by this driver
  * @probe: function called on probe
  * @remove: function called on remove
@@ -124,11 +124,6 @@ enum uc_todo {
  * @notify: notify driver of device state changes
  * @path_event: notify driver of channel path events
  * @shutdown: called at device shutdown
- * @prepare: prepare for pm state transition
- * @complete: undo work done in @prepare
- * @freeze: callback for freezing during hibernation snapshotting
- * @thaw: undo work done in @freeze
- * @restore: callback for restoring after hibernation
  * @uc_handler: callback for unit check handler
  * @driver: embedded device driver structure
  * @int_class: interruption class to use for accounting interrupts
@@ -142,11 +137,6 @@ struct ccw_driver {
 	int (*notify) (struct ccw_device *, int);
 	void (*path_event) (struct ccw_device *, int *);
 	void (*shutdown) (struct ccw_device *);
-	int (*prepare) (struct ccw_device *);
-	void (*complete) (struct ccw_device *);
-	int (*freeze)(struct ccw_device *);
-	int (*thaw) (struct ccw_device *);
-	int (*restore)(struct ccw_device *);
 	enum uc_todo (*uc_handler) (struct ccw_device *, struct irb *);
 	struct device_driver driver;
 	enum interruption_class int_class;
diff --git a/arch/s390/include/asm/cio.h b/arch/s390/include/asm/cio.h
index 5c58756d6476..23dceb8d0453 100644
--- a/arch/s390/include/asm/cio.h
+++ b/arch/s390/include/asm/cio.h
@@ -329,7 +329,7 @@ struct ccw_dev_id {
 };
 
 /**
- * ccw_device_id_is_equal() - compare two ccw_dev_ids
+ * ccw_dev_id_is_equal() - compare two ccw_dev_ids
  * @dev_id1: a ccw_dev_id
  * @dev_id2: another ccw_dev_id
  * Returns:
diff --git a/arch/s390/include/asm/delay.h b/arch/s390/include/asm/delay.h
index 898323fd93d2..4a08379cd1eb 100644
--- a/arch/s390/include/asm/delay.h
+++ b/arch/s390/include/asm/delay.h
@@ -13,6 +13,7 @@
 #ifndef _S390_DELAY_H
 #define _S390_DELAY_H
 
+void udelay_enable(void);
 void __ndelay(unsigned long long nsecs);
 void __udelay(unsigned long long usecs);
 void udelay_simple(unsigned long long usecs);
diff --git a/arch/s390/include/asm/ftrace.h b/arch/s390/include/asm/ftrace.h
index 68d362f8d6c1..695c61989f97 100644
--- a/arch/s390/include/asm/ftrace.h
+++ b/arch/s390/include/asm/ftrace.h
@@ -2,16 +2,9 @@
 #ifndef _ASM_S390_FTRACE_H
 #define _ASM_S390_FTRACE_H
 
+#define HAVE_FUNCTION_GRAPH_RET_ADDR_PTR
 #define ARCH_SUPPORTS_FTRACE_OPS 1
-
-#if defined(CC_USING_HOTPATCH) || defined(CC_USING_NOP_MCOUNT)
 #define MCOUNT_INSN_SIZE	6
-#else
-#define MCOUNT_INSN_SIZE	24
-#define MCOUNT_RETURN_FIXUP	18
-#endif
-
-#define HAVE_FUNCTION_GRAPH_RET_ADDR_PTR
 
 #ifndef __ASSEMBLY__
 
@@ -22,7 +15,6 @@
 #define ftrace_return_address(n) __builtin_return_address(n)
 #endif
 
-void _mcount(void);
 void ftrace_caller(void);
 
 extern char ftrace_graph_caller_end;
@@ -30,12 +22,20 @@ extern unsigned long ftrace_plt;
 
 struct dyn_arch_ftrace { };
 
-#define MCOUNT_ADDR ((unsigned long)_mcount)
+#define MCOUNT_ADDR 0
 #define FTRACE_ADDR ((unsigned long)ftrace_caller)
 
 #define KPROBE_ON_FTRACE_NOP	0
 #define KPROBE_ON_FTRACE_CALL	1
 
+struct module;
+struct dyn_ftrace;
+/*
+ * Either -mhotpatch or -mnop-mcount is used - no explicit init is required
+ */
+static inline int ftrace_init_nop(struct module *mod, struct dyn_ftrace *rec) { return 0; }
+#define ftrace_init_nop ftrace_init_nop
+
 static inline unsigned long ftrace_call_adjust(unsigned long addr)
 {
 	return addr;
@@ -49,28 +49,17 @@ struct ftrace_insn {
 static inline void ftrace_generate_nop_insn(struct ftrace_insn *insn)
 {
 #ifdef CONFIG_FUNCTION_TRACER
-#if defined(CC_USING_HOTPATCH) || defined(CC_USING_NOP_MCOUNT)
 	/* brcl 0,0 */
 	insn->opc = 0xc004;
 	insn->disp = 0;
-#else
-	/* jg .+24 */
-	insn->opc = 0xc0f4;
-	insn->disp = MCOUNT_INSN_SIZE / 2;
-#endif
 #endif
 }
 
 static inline int is_ftrace_nop(struct ftrace_insn *insn)
 {
 #ifdef CONFIG_FUNCTION_TRACER
-#if defined(CC_USING_HOTPATCH) || defined(CC_USING_NOP_MCOUNT)
 	if (insn->disp == 0)
 		return 1;
-#else
-	if (insn->disp == MCOUNT_INSN_SIZE / 2)
-		return 1;
-#endif
 #endif
 	return 0;
 }
diff --git a/arch/s390/include/asm/futex.h b/arch/s390/include/asm/futex.h
index 26f9144562c9..c22debfcebf1 100644
--- a/arch/s390/include/asm/futex.h
+++ b/arch/s390/include/asm/futex.h
@@ -26,9 +26,7 @@ static inline int arch_futex_atomic_op_inuser(int op, int oparg, int *oval,
 		u32 __user *uaddr)
 {
 	int oldval = 0, newval, ret;
-	mm_segment_t old_fs;
 
-	old_fs = enable_sacf_uaccess();
 	switch (op) {
 	case FUTEX_OP_SET:
 		__futex_atomic_op("lr %2,%5\n",
@@ -53,7 +51,6 @@ static inline int arch_futex_atomic_op_inuser(int op, int oparg, int *oval,
 	default:
 		ret = -ENOSYS;
 	}
-	disable_sacf_uaccess(old_fs);
 
 	if (!ret)
 		*oval = oldval;
@@ -64,10 +61,8 @@ static inline int arch_futex_atomic_op_inuser(int op, int oparg, int *oval,
 static inline int futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr,
 						u32 oldval, u32 newval)
 {
-	mm_segment_t old_fs;
 	int ret;
 
-	old_fs = enable_sacf_uaccess();
 	asm volatile(
 		"   sacf 256\n"
 		"0: cs   %1,%4,0(%5)\n"
@@ -77,7 +72,6 @@ static inline int futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr,
 		: "=d" (ret), "+d" (oldval), "=m" (*uaddr)
 		: "0" (-EFAULT), "d" (newval), "a" (uaddr), "m" (*uaddr)
 		: "cc", "memory");
-	disable_sacf_uaccess(old_fs);
 	*uval = oldval;
 	return ret;
 }
diff --git a/arch/s390/include/asm/kasan.h b/arch/s390/include/asm/kasan.h
index e9bf486de136..76f351bd6645 100644
--- a/arch/s390/include/asm/kasan.h
+++ b/arch/s390/include/asm/kasan.h
@@ -2,28 +2,51 @@
 #ifndef __ASM_KASAN_H
 #define __ASM_KASAN_H
 
+#include <asm/pgtable.h>
+
 #ifdef CONFIG_KASAN
 
 #define KASAN_SHADOW_SCALE_SHIFT 3
-#ifdef CONFIG_KASAN_S390_4_LEVEL_PAGING
 #define KASAN_SHADOW_SIZE						       \
 	(_AC(1, UL) << (_REGION1_SHIFT - KASAN_SHADOW_SCALE_SHIFT))
-#else
-#define KASAN_SHADOW_SIZE						       \
-	(_AC(1, UL) << (_REGION2_SHIFT - KASAN_SHADOW_SCALE_SHIFT))
-#endif
 #define KASAN_SHADOW_OFFSET	_AC(CONFIG_KASAN_SHADOW_OFFSET, UL)
 #define KASAN_SHADOW_START	KASAN_SHADOW_OFFSET
 #define KASAN_SHADOW_END	(KASAN_SHADOW_START + KASAN_SHADOW_SIZE)
 
 extern void kasan_early_init(void);
-extern void kasan_copy_shadow(pgd_t *dst);
+extern void kasan_copy_shadow_mapping(void);
 extern void kasan_free_early_identity(void);
 extern unsigned long kasan_vmax;
+
+/*
+ * Estimate kasan memory requirements, which it will reserve
+ * at the very end of available physical memory. To estimate
+ * that, we take into account that kasan would require
+ * 1/8 of available physical memory (for shadow memory) +
+ * creating page tables for the whole memory + shadow memory
+ * region (1 + 1/8). To keep page tables estimates simple take
+ * the double of combined ptes size.
+ *
+ * physmem parameter has to be already adjusted if not entire physical memory
+ * would be used (e.g. due to effect of "mem=" option).
+ */
+static inline unsigned long kasan_estimate_memory_needs(unsigned long physmem)
+{
+	unsigned long kasan_needs;
+	unsigned long pages;
+	/* for shadow memory */
+	kasan_needs = round_up(physmem / 8, PAGE_SIZE);
+	/* for paging structures */
+	pages = DIV_ROUND_UP(physmem + kasan_needs, PAGE_SIZE);
+	kasan_needs += DIV_ROUND_UP(pages, _PAGE_ENTRIES) * _PAGE_TABLE_SIZE * 2;
+
+	return kasan_needs;
+}
 #else
 static inline void kasan_early_init(void) { }
-static inline void kasan_copy_shadow(pgd_t *dst) { }
+static inline void kasan_copy_shadow_mapping(void) { }
 static inline void kasan_free_early_identity(void) { }
+static inline unsigned long kasan_estimate_memory_needs(unsigned long physmem) { return 0; }
 #endif
 
 #endif
diff --git a/arch/s390/include/asm/lowcore.h b/arch/s390/include/asm/lowcore.h
index 612ed3c6d581..69ce9191eaf1 100644
--- a/arch/s390/include/asm/lowcore.h
+++ b/arch/s390/include/asm/lowcore.h
@@ -116,7 +116,7 @@ struct lowcore {
 	/* Address space pointer. */
 	__u64	kernel_asce;			/* 0x0380 */
 	__u64	user_asce;			/* 0x0388 */
-	__u64	vdso_asce;			/* 0x0390 */
+	__u8	pad_0x0390[0x0398-0x0390];	/* 0x0390 */
 
 	/*
 	 * The lpp and current_pid fields form a
@@ -134,7 +134,7 @@ struct lowcore {
 	__u32	spinlock_index;			/* 0x03b0 */
 	__u32	fpu_flags;			/* 0x03b4 */
 	__u64	percpu_offset;			/* 0x03b8 */
-	__u64	vdso_per_cpu_data;		/* 0x03c0 */
+	__u8	pad_0x03c0[0x03c8-0x03c0];	/* 0x03c0 */
 	__u64	machine_flags;			/* 0x03c8 */
 	__u64	gmap;				/* 0x03d0 */
 	__u8	pad_0x03d8[0x0400-0x03d8];	/* 0x03d8 */
diff --git a/arch/s390/include/asm/mmu_context.h b/arch/s390/include/asm/mmu_context.h
index c9f3d8a52756..5dc49c467319 100644
--- a/arch/s390/include/asm/mmu_context.h
+++ b/arch/s390/include/asm/mmu_context.h
@@ -71,39 +71,18 @@ static inline int init_new_context(struct task_struct *tsk,
 
 #define destroy_context(mm)             do { } while (0)
 
-static inline void set_user_asce(struct mm_struct *mm)
-{
-	S390_lowcore.user_asce = mm->context.asce;
-	__ctl_load(S390_lowcore.user_asce, 1, 1);
-	clear_cpu_flag(CIF_ASCE_PRIMARY);
-}
-
-static inline void clear_user_asce(void)
-{
-	S390_lowcore.user_asce = S390_lowcore.kernel_asce;
-	__ctl_load(S390_lowcore.kernel_asce, 1, 1);
-	set_cpu_flag(CIF_ASCE_PRIMARY);
-}
-
-mm_segment_t enable_sacf_uaccess(void);
-void disable_sacf_uaccess(mm_segment_t old_fs);
-
 static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
 			     struct task_struct *tsk)
 {
 	int cpu = smp_processor_id();
 
-	S390_lowcore.user_asce = next->context.asce;
+	if (next == &init_mm)
+		S390_lowcore.user_asce = s390_invalid_asce;
+	else
+		S390_lowcore.user_asce = next->context.asce;
 	cpumask_set_cpu(cpu, &next->context.cpu_attach_mask);
-	/* Clear previous user-ASCE from CR1 and CR7 */
-	if (!test_cpu_flag(CIF_ASCE_PRIMARY)) {
-		__ctl_load(S390_lowcore.kernel_asce, 1, 1);
-		set_cpu_flag(CIF_ASCE_PRIMARY);
-	}
-	if (test_cpu_flag(CIF_ASCE_SECONDARY)) {
-		__ctl_load(S390_lowcore.vdso_asce, 7, 7);
-		clear_cpu_flag(CIF_ASCE_SECONDARY);
-	}
+	/* Clear previous user-ASCE from CR7 */
+	__ctl_load(s390_invalid_asce, 7, 7);
 	if (prev != next)
 		cpumask_clear_cpu(cpu, &prev->context.cpu_attach_mask);
 }
@@ -122,7 +101,7 @@ static inline void finish_arch_post_lock_switch(void)
 		__tlb_flush_mm_lazy(mm);
 		preempt_enable();
 	}
-	set_fs(current->thread.mm_segment);
+	__ctl_load(S390_lowcore.user_asce, 7, 7);
 }
 
 #define enter_lazy_tlb(mm,tsk)	do { } while (0)
@@ -133,7 +112,7 @@ static inline void activate_mm(struct mm_struct *prev,
 {
 	switch_mm(prev, next, current);
 	cpumask_set_cpu(smp_processor_id(), mm_cpumask(next));
-	set_user_asce(next);
+	__ctl_load(S390_lowcore.user_asce, 7, 7);
 }
 
 #endif /* __S390_MMU_CONTEXT_H */
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index b5dbae78969b..794746a32806 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -23,6 +23,7 @@
 
 extern pgd_t swapper_pg_dir[];
 extern void paging_init(void);
+extern unsigned long s390_invalid_asce;
 
 enum {
 	PG_DIRECT_MAP_4K = 0,
@@ -79,15 +80,15 @@ extern unsigned long zero_page_mask;
 
 /*
  * The vmalloc and module area will always be on the topmost area of the
- * kernel mapping. We reserve 128GB (64bit) for vmalloc and modules.
- * On 64 bit kernels we have a 2GB area at the top of the vmalloc area where
- * modules will reside. That makes sure that inter module branches always
- * happen without trampolines and in addition the placement within a 2GB frame
- * is branch prediction unit friendly.
+ * kernel mapping. 512GB are reserved for vmalloc by default.
+ * At the top of the vmalloc area a 2GB area is reserved where modules
+ * will reside. That makes sure that inter module branches always
+ * happen without trampolines and in addition the placement within a
+ * 2GB frame is branch prediction unit friendly.
  */
 extern unsigned long VMALLOC_START;
 extern unsigned long VMALLOC_END;
-#define VMALLOC_DEFAULT_SIZE	((128UL << 30) - MODULES_LEN)
+#define VMALLOC_DEFAULT_SIZE	((512UL << 30) - MODULES_LEN)
 extern struct page *vmemmap;
 extern unsigned long vmemmap_size;
 
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h
index 962da04234af..6b7269f51f83 100644
--- a/arch/s390/include/asm/processor.h
+++ b/arch/s390/include/asm/processor.h
@@ -14,8 +14,6 @@
 
 #include <linux/bits.h>
 
-#define CIF_ASCE_PRIMARY	0	/* primary asce needs fixup / uaccess */
-#define CIF_ASCE_SECONDARY	1	/* secondary asce needs fixup / uaccess */
 #define CIF_NOHZ_DELAY		2	/* delay HZ disable for a tick */
 #define CIF_FPU			3	/* restore FPU registers */
 #define CIF_IGNORE_IRQ		4	/* ignore interrupt (for udelay) */
@@ -23,8 +21,6 @@
 #define CIF_MCCK_GUEST		6	/* machine check happening in guest */
 #define CIF_DEDICATED_CPU	7	/* this CPU is dedicated */
 
-#define _CIF_ASCE_PRIMARY	BIT(CIF_ASCE_PRIMARY)
-#define _CIF_ASCE_SECONDARY	BIT(CIF_ASCE_SECONDARY)
 #define _CIF_NOHZ_DELAY		BIT(CIF_NOHZ_DELAY)
 #define _CIF_FPU		BIT(CIF_FPU)
 #define _CIF_IGNORE_IRQ		BIT(CIF_IGNORE_IRQ)
@@ -102,8 +98,6 @@ extern void __bpon(void);
 
 #define HAVE_ARCH_PICK_MMAP_LAYOUT
 
-typedef unsigned int mm_segment_t;
-
 /*
  * Thread structure
  */
@@ -116,7 +110,6 @@ struct thread_struct {
 	unsigned long hardirq_timer;	/* task cputime in hardirq context */
 	unsigned long softirq_timer;	/* task cputime in softirq context */
 	unsigned long sys_call_table;	/* system call table address */
-	mm_segment_t mm_segment;
 	unsigned long gmap_addr;	/* address of last gmap fault. */
 	unsigned int gmap_write_flag;	/* gmap fault write indication */
 	unsigned int gmap_int_code;	/* int code of last gmap fault */
@@ -318,14 +311,10 @@ static __always_inline void __noreturn disabled_wait(void)
 }
 
 /*
- * Basic Machine Check/Program Check Handler.
+ * Basic Program Check Handler.
  */
-
 extern void s390_base_pgm_handler(void);
-extern void s390_base_ext_handler(void);
-
 extern void (*s390_base_pgm_handler_fn)(void);
-extern void (*s390_base_ext_handler_fn)(void);
 
 #define ARCH_LOW_ADDRESS_LIMIT	0x7fffffffUL
 
diff --git a/arch/s390/include/asm/ptrace.h b/arch/s390/include/asm/ptrace.h
index 16b3e4396312..73ca7f7cac33 100644
--- a/arch/s390/include/asm/ptrace.h
+++ b/arch/s390/include/asm/ptrace.h
@@ -87,6 +87,7 @@ struct pt_regs
 	unsigned int int_parm;
 	unsigned long int_parm_long;
 	unsigned long flags;
+	unsigned long cr1;
 };
 
 /*
diff --git a/arch/s390/include/asm/sclp.h b/arch/s390/include/asm/sclp.h
index a7bdd128d85b..5763769a39b6 100644
--- a/arch/s390/include/asm/sclp.h
+++ b/arch/s390/include/asm/sclp.h
@@ -12,7 +12,12 @@
 #include <asm/cpu.h>
 
 #define SCLP_CHP_INFO_MASK_SIZE		32
-#define SCLP_MAX_CORES			256
+#define EARLY_SCCB_SIZE		PAGE_SIZE
+#define SCLP_MAX_CORES		512
+/* 144 + 16 * SCLP_MAX_CORES + 2 * (SCLP_MAX_CORES - 1) */
+#define EXT_SCCB_READ_SCP	(3 * PAGE_SIZE)
+/* 24 + 16 * SCLP_MAX_CORES */
+#define EXT_SCCB_READ_CPU	(3 * PAGE_SIZE)
 
 struct sclp_chp_info {
 	u8 recognized[SCLP_CHP_INFO_MASK_SIZE];
diff --git a/arch/s390/include/asm/setup.h b/arch/s390/include/asm/setup.h
index bdb242a1544e..3e388fa208d4 100644
--- a/arch/s390/include/asm/setup.h
+++ b/arch/s390/include/asm/setup.h
@@ -16,8 +16,6 @@
 #define EARLY_SCCB_OFFSET	0x11000
 #define HEAD_END		0x12000
 
-#define EARLY_SCCB_SIZE		PAGE_SIZE
-
 /*
  * Machine features detected in early.c
  */
@@ -88,10 +86,8 @@ extern unsigned int zlib_dfltcc_support;
 #define ZLIB_DFLTCC_FULL_DEBUG		4
 
 extern int noexec_disabled;
-extern int memory_end_set;
-extern unsigned long memory_end;
+extern unsigned long ident_map_size;
 extern unsigned long vmalloc_size;
-extern unsigned long max_physmem_end;
 
 /* The Write Back bit position in the physaddr is given by the SLPC PCI */
 extern unsigned long mio_wb_bit_mask;
diff --git a/arch/s390/include/asm/thread_info.h b/arch/s390/include/asm/thread_info.h
index 13a04fcf7762..ce788f3e534d 100644
--- a/arch/s390/include/asm/thread_info.h
+++ b/arch/s390/include/asm/thread_info.h
@@ -18,7 +18,7 @@
 #else
 #define THREAD_SIZE_ORDER 2
 #endif
-#define BOOT_STACK_ORDER  2
+#define BOOT_STACK_SIZE (PAGE_SIZE << 2)
 #define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
 
 #ifndef __ASSEMBLY__
diff --git a/arch/s390/include/asm/timex.h b/arch/s390/include/asm/timex.h
index 289aaff4d365..c8e244ecdfde 100644
--- a/arch/s390/include/asm/timex.h
+++ b/arch/s390/include/asm/timex.h
@@ -49,6 +49,13 @@ static inline void set_clock_comparator(__u64 time)
 	asm volatile("sckc %0" : : "Q" (time));
 }
 
+static inline void set_tod_programmable_field(u16 val)
+{
+	register unsigned long reg0 asm("0") = val;
+
+	asm volatile("sckpf" : : "d" (reg0));
+}
+
 void clock_comparator_work(void);
 
 void __init time_early_init(void);
diff --git a/arch/s390/include/asm/uaccess.h b/arch/s390/include/asm/uaccess.h
index c868e7ee49b3..c6707885e7c2 100644
--- a/arch/s390/include/asm/uaccess.h
+++ b/arch/s390/include/asm/uaccess.h
@@ -18,23 +18,7 @@
 #include <asm/extable.h>
 #include <asm/facility.h>
 
-/*
- * The fs value determines whether argument validity checking should be
- * performed or not.  If get_fs() == USER_DS, checking is performed, with
- * get_fs() == KERNEL_DS, checking is bypassed.
- *
- * For historical reasons, these macros are grossly misnamed.
- */
-
-#define KERNEL_DS	(0)
-#define KERNEL_DS_SACF	(1)
-#define USER_DS		(2)
-#define USER_DS_SACF	(3)
-
-#define get_fs()        (current->thread.mm_segment)
-#define uaccess_kernel() ((get_fs() & 2) == KERNEL_DS)
-
-void set_fs(mm_segment_t fs);
+void debug_user_asce(void);
 
 static inline int __range_ok(unsigned long addr, unsigned long size)
 {
@@ -88,7 +72,7 @@ int __get_user_bad(void) __attribute__((noreturn));
 
 static __always_inline int __put_user_fn(void *x, void __user *ptr, unsigned long size)
 {
-	unsigned long spec = 0x010000UL;
+	unsigned long spec = 0x810000UL;
 	int rc;
 
 	switch (size) {
@@ -121,7 +105,7 @@ static __always_inline int __put_user_fn(void *x, void __user *ptr, unsigned lon
 
 static __always_inline int __get_user_fn(void *x, const void __user *ptr, unsigned long size)
 {
-	unsigned long spec = 0x01UL;
+	unsigned long spec = 0x81UL;
 	int rc;
 
 	switch (size) {
diff --git a/arch/s390/include/asm/vdso.h b/arch/s390/include/asm/vdso.h
index 29b44a930e71..f65590889054 100644
--- a/arch/s390/include/asm/vdso.h
+++ b/arch/s390/include/asm/vdso.h
@@ -12,32 +12,9 @@
 
 #ifndef __ASSEMBLY__
 
-/*
- * Note about the vdso_data and vdso_per_cpu_data structures:
- *
- * NEVER USE THEM IN USERSPACE CODE DIRECTLY. The layout of the
- * structure is supposed to be known only to the function in the vdso
- * itself and may change without notice.
- */
-
-struct vdso_per_cpu_data {
-	/*
-	 * Note: node_id and cpu_nr must be at adjacent memory locations.
-	 * VDSO userspace must read both values with a single instruction.
-	 */
-	union {
-		__u64 getcpu_val;
-		struct {
-			__u32 node_id;
-			__u32 cpu_nr;
-		};
-	};
-};
-
 extern struct vdso_data *vdso_data;
 
-int vdso_alloc_per_cpu(struct lowcore *lowcore);
-void vdso_free_per_cpu(struct lowcore *lowcore);
+void vdso_getcpu_init(void);
 
 #endif /* __ASSEMBLY__ */
 #endif /* __S390_VDSO_H__ */