Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 updates from Martin Schwidefsky:

 - The remaining patches for the z13 machine support: kernel build
   option for z13, the cache synonym avoidance, SMT support,
   compare-and-delay for spinloops and the CES5S crypto adapater.

 - The ftrace support for function tracing with the gcc hotpatch option.
   This touches common code Makefiles, Steven is ok with the changes.

 - The hypfs file system gets an extension to access diagnose 0x0c data
   in user space for performance analysis for Linux running under z/VM.

 - The iucv hvc console gets wildcard spport for the user id filtering.

 - The cacheinfo code is converted to use the generic infrastructure.

 - Cleanup and bug fixes.

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (42 commits)
  s390/process: free vx save area when releasing tasks
  s390/hypfs: Eliminate hypfs interval
  s390/hypfs: Add diagnose 0c support
  s390/cacheinfo: don't use smp_processor_id() in preemptible context
  s390/zcrypt: fixed domain scanning problem (again)
  s390/smp: increase maximum value of NR_CPUS to 512
  s390/jump label: use different nop instruction
  s390/jump label: add sanity checks
  s390/mm: correct missing space when reporting user process faults
  s390/dasd: cleanup profiling
  s390/dasd: add locking for global_profile access
  s390/ftrace: hotpatch support for function tracing
  ftrace: let notrace function attribute disable hotpatching if necessary
  ftrace: allow architectures to specify ftrace compile options
  s390: reintroduce diag 44 calls for cpu_relax()
  s390/zcrypt: Add support for new crypto express (CEX5S) adapter.
  s390/zcrypt: Number of supported ap domains is not retrievable.
  s390/spinlock: add compare-and-delay to lock wait loops
  s390/tape: remove redundant if statement
  s390/hvc_iucv: add simple wildcard matches to the iucv allow filter
  ...

Makefile

@@ -726,10 +726,14 @@ KBUILD_CFLAGS 	+= $(call cc-option, -femit-struct-debug-baseonly) \
 endif
 
 ifdef CONFIG_FUNCTION_TRACER
+ifndef CC_FLAGS_FTRACE
+CC_FLAGS_FTRACE := -pg
+endif
+export CC_FLAGS_FTRACE
 ifdef CONFIG_HAVE_FENTRY
 CC_USING_FENTRY	:= $(call cc-option, -mfentry -DCC_USING_FENTRY)
 endif
-KBUILD_CFLAGS	+= -pg $(CC_USING_FENTRY)
+KBUILD_CFLAGS	+= $(CC_FLAGS_FTRACE) $(CC_USING_FENTRY)
 KBUILD_AFLAGS	+= $(CC_USING_FENTRY)
 ifdef CONFIG_DYNAMIC_FTRACE
 	ifdef CONFIG_HAVE_C_RECORDMCOUNT

arch/s390/Kconfig

@@ -66,6 +66,7 @@ config S390
 	select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
 	select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS
 	select ARCH_HAS_GCOV_PROFILE_ALL
+	select ARCH_HAS_SG_CHAIN
 	select ARCH_HAVE_NMI_SAFE_CMPXCHG
 	select ARCH_INLINE_READ_LOCK
 	select ARCH_INLINE_READ_LOCK_BH
@@ -116,7 +117,6 @@ config S390
 	select HAVE_BPF_JIT if 64BIT && PACK_STACK
 	select HAVE_CMPXCHG_DOUBLE
 	select HAVE_CMPXCHG_LOCAL
-	select HAVE_C_RECORDMCOUNT
 	select HAVE_DEBUG_KMEMLEAK
 	select HAVE_DYNAMIC_FTRACE if 64BIT
 	select HAVE_DYNAMIC_FTRACE_WITH_REGS if 64BIT
@@ -151,7 +151,6 @@ config S390
 	select TTY
 	select VIRT_CPU_ACCOUNTING
 	select VIRT_TO_BUS
-	select ARCH_HAS_SG_CHAIN
 
 config SCHED_OMIT_FRAME_POINTER
 	def_bool y
@@ -185,6 +184,10 @@ config HAVE_MARCH_ZEC12_FEATURES
 	def_bool n
 	select HAVE_MARCH_Z196_FEATURES
 
+config HAVE_MARCH_Z13_FEATURES
+	def_bool n
+	select HAVE_MARCH_ZEC12_FEATURES
+
 choice
 	prompt "Processor type"
 	default MARCH_G5
@@ -244,6 +247,14 @@ config MARCH_ZEC12
 	  2827 series). The kernel will be slightly faster but will not work on
 	  older machines.
 
+config MARCH_Z13
+	bool "IBM z13"
+	select HAVE_MARCH_Z13_FEATURES if 64BIT
+	help
+	  Select this to enable optimizations for IBM z13 (2964 series).
+	  The kernel will be slightly faster but will not work on older
+	  machines.
+
 endchoice
 
 config MARCH_G5_TUNE
@@ -267,6 +278,9 @@ config MARCH_Z196_TUNE
 config MARCH_ZEC12_TUNE
 	def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT
 
+config MARCH_Z13_TUNE
+	def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT
+
 choice
 	prompt "Tune code generation"
 	default TUNE_DEFAULT
@@ -305,6 +319,9 @@ config TUNE_Z196
 config TUNE_ZEC12
 	bool "IBM zBC12 and zEC12"
 
+config TUNE_Z13
+	bool "IBM z13"
+
 endchoice
 
 config 64BIT
@@ -356,14 +373,14 @@ config SMP
 	  Even if you don't know what to do here, say Y.
 
 config NR_CPUS
-	int "Maximum number of CPUs (2-256)"
-	range 2 256
+	int "Maximum number of CPUs (2-512)"
+	range 2 512
 	depends on SMP
 	default "32" if !64BIT
 	default "64" if 64BIT
 	help
 	  This allows you to specify the maximum number of CPUs which this
-	  kernel will support. The maximum supported value is 256 and the
+	  kernel will support. The maximum supported value is 512 and the
 	  minimum value which makes sense is 2.
 
 	  This is purely to save memory - each supported CPU adds
@@ -378,17 +395,26 @@ config HOTPLUG_CPU
 	  can be controlled through /sys/devices/system/cpu/cpu#.
 	  Say N if you want to disable CPU hotplug.
 
+config SCHED_SMT
+	def_bool n
+
 config SCHED_MC
 	def_bool n
 
 config SCHED_BOOK
+	def_bool n
+
+config SCHED_TOPOLOGY
 	def_bool y
-	prompt "Book scheduler support"
+	prompt "Topology scheduler support"
 	depends on SMP
+	select SCHED_SMT
 	select SCHED_MC
+	select SCHED_BOOK
 	help
-	  Book scheduler support improves the CPU scheduler's decision making
-	  when dealing with machines that have several books.
+	  Topology scheduler support improves the CPU scheduler's decision
+	  making when dealing with machines that have multi-threading,
+	  multiple cores or multiple books.
 
 source kernel/Kconfig.preempt
 

arch/s390/Makefile

@@ -42,6 +42,7 @@ mflags-$(CONFIG_MARCH_Z9_109) := -march=z9-109
 mflags-$(CONFIG_MARCH_Z10)    := -march=z10
 mflags-$(CONFIG_MARCH_Z196)   := -march=z196
 mflags-$(CONFIG_MARCH_ZEC12)  := -march=zEC12
+mflags-$(CONFIG_MARCH_Z13)   := -march=z13
 
 aflags-y += $(mflags-y)
 cflags-y += $(mflags-y)
@@ -53,6 +54,7 @@ cflags-$(CONFIG_MARCH_Z9_109_TUNE)	+= -mtune=z9-109
 cflags-$(CONFIG_MARCH_Z10_TUNE)		+= -mtune=z10
 cflags-$(CONFIG_MARCH_Z196_TUNE)	+= -mtune=z196
 cflags-$(CONFIG_MARCH_ZEC12_TUNE)	+= -mtune=zEC12
+cflags-$(CONFIG_MARCH_Z13_TUNE)	+= -mtune=z13
 
 #KBUILD_IMAGE is necessary for make rpm
 KBUILD_IMAGE	:=arch/s390/boot/image
@@ -85,6 +87,16 @@ ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y)
 cflags-$(CONFIG_WARN_DYNAMIC_STACK) += -mwarn-dynamicstack
 endif
 
+ifdef CONFIG_FUNCTION_TRACER
+# make use of hotpatch feature if the compiler supports it
+cc_hotpatch	:= -mhotpatch=0,3
+ifeq ($(call cc-option-yn,$(cc_hotpatch)),y)
+CC_FLAGS_FTRACE := $(cc_hotpatch)
+KBUILD_AFLAGS	+= -DCC_USING_HOTPATCH
+KBUILD_CFLAGS	+= -DCC_USING_HOTPATCH
+endif
+endif
+
 KBUILD_CFLAGS	+= -mbackchain -msoft-float $(cflags-y)
 KBUILD_CFLAGS	+= -pipe -fno-strength-reduce -Wno-sign-compare
 KBUILD_AFLAGS	+= $(aflags-y)

arch/s390/boot/compressed/misc.c

@@ -8,6 +8,7 @@
 
 #include <asm/uaccess.h>
 #include <asm/page.h>
+#include <asm/sclp.h>
 #include <asm/ipl.h>
 #include "sizes.h"
 
@@ -63,8 +64,6 @@ static unsigned long free_mem_end_ptr;
 #include "../../../../lib/decompress_unxz.c"
 #endif
 
-extern _sclp_print_early(const char *);
-
 static int puts(const char *s)
 {
 	_sclp_print_early(s);

arch/s390/configs/default_defconfig

@@ -555,7 +555,6 @@ CONFIG_DEBUG_OBJECTS_RCU_HEAD=y
 CONFIG_DEBUG_OBJECTS_PERCPU_COUNTER=y
 CONFIG_SLUB_DEBUG_ON=y
 CONFIG_SLUB_STATS=y
-CONFIG_DEBUG_KMEMLEAK=y
 CONFIG_DEBUG_STACK_USAGE=y
 CONFIG_DEBUG_VM=y
 CONFIG_DEBUG_VM_RB=y
@@ -563,6 +562,7 @@ CONFIG_MEMORY_NOTIFIER_ERROR_INJECT=m
 CONFIG_DEBUG_PER_CPU_MAPS=y
 CONFIG_DEBUG_SHIRQ=y
 CONFIG_DETECT_HUNG_TASK=y
+CONFIG_PANIC_ON_OOPS=y
 CONFIG_TIMER_STATS=y
 CONFIG_DEBUG_RT_MUTEXES=y
 CONFIG_DEBUG_WW_MUTEX_SLOWPATH=y

arch/s390/configs/gcov_defconfig

@@ -540,6 +540,7 @@ CONFIG_UNUSED_SYMBOLS=y
 CONFIG_MAGIC_SYSRQ=y
 CONFIG_DEBUG_KERNEL=y
 CONFIG_MEMORY_NOTIFIER_ERROR_INJECT=m
+CONFIG_PANIC_ON_OOPS=y
 CONFIG_TIMER_STATS=y
 CONFIG_RCU_TORTURE_TEST=m
 CONFIG_RCU_CPU_STALL_TIMEOUT=60

arch/s390/configs/performance_defconfig

@@ -537,6 +537,7 @@ CONFIG_FRAME_WARN=1024
 CONFIG_UNUSED_SYMBOLS=y
 CONFIG_MAGIC_SYSRQ=y
 CONFIG_DEBUG_KERNEL=y
+CONFIG_PANIC_ON_OOPS=y
 CONFIG_TIMER_STATS=y
 CONFIG_RCU_TORTURE_TEST=m
 CONFIG_RCU_CPU_STALL_TIMEOUT=60

arch/s390/configs/zfcpdump_defconfig

@@ -71,6 +71,7 @@ CONFIG_PRINTK_TIME=y
 CONFIG_DEBUG_INFO=y
 CONFIG_DEBUG_FS=y
 CONFIG_DEBUG_KERNEL=y
+CONFIG_PANIC_ON_OOPS=y
 # CONFIG_SCHED_DEBUG is not set
 CONFIG_RCU_CPU_STALL_TIMEOUT=60
 # CONFIG_FTRACE is not set

arch/s390/crypto/aes_s390.c

@@ -134,7 +134,7 @@ static int aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
 
 static void aes_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
 {
-	const struct s390_aes_ctx *sctx = crypto_tfm_ctx(tfm);
+	struct s390_aes_ctx *sctx = crypto_tfm_ctx(tfm);
 
 	if (unlikely(need_fallback(sctx->key_len))) {
 		crypto_cipher_encrypt_one(sctx->fallback.cip, out, in);
@@ -159,7 +159,7 @@ static void aes_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
 
 static void aes_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
 {
-	const struct s390_aes_ctx *sctx = crypto_tfm_ctx(tfm);
+	struct s390_aes_ctx *sctx = crypto_tfm_ctx(tfm);
 
 	if (unlikely(need_fallback(sctx->key_len))) {
 		crypto_cipher_decrypt_one(sctx->fallback.cip, out, in);

arch/s390/defconfig

@@ -14,7 +14,6 @@ CONFIG_IKCONFIG_PROC=y
 CONFIG_CGROUPS=y
 CONFIG_CPUSETS=y
 CONFIG_CGROUP_CPUACCT=y
-CONFIG_RESOURCE_COUNTERS=y
 CONFIG_MEMCG=y
 CONFIG_MEMCG_SWAP=y
 CONFIG_CGROUP_SCHED=y
@@ -22,12 +21,8 @@ CONFIG_RT_GROUP_SCHED=y
 CONFIG_BLK_CGROUP=y
 CONFIG_NAMESPACES=y
 CONFIG_BLK_DEV_INITRD=y
-CONFIG_RD_BZIP2=y
-CONFIG_RD_LZMA=y
-CONFIG_RD_XZ=y
-CONFIG_RD_LZO=y
-CONFIG_RD_LZ4=y
 CONFIG_EXPERT=y
+CONFIG_BPF_SYSCALL=y
 # CONFIG_COMPAT_BRK is not set
 CONFIG_PROFILING=y
 CONFIG_OPROFILE=y

arch/s390/hypfs/Makefile

@@ -5,3 +5,4 @@
 obj-$(CONFIG_S390_HYPFS_FS) += s390_hypfs.o
 
 s390_hypfs-objs := inode.o hypfs_diag.o hypfs_vm.o hypfs_dbfs.o hypfs_sprp.o
+s390_hypfs-objs += hypfs_diag0c.o

arch/s390/hypfs/hypfs.h

@@ -37,6 +37,10 @@ extern int hypfs_vm_init(void);
 extern void hypfs_vm_exit(void);
 extern int hypfs_vm_create_files(struct dentry *root);
 
+/* VM diagnose 0c */
+int hypfs_diag0c_init(void);
+void hypfs_diag0c_exit(void);
+
 /* Set Partition-Resource Parameter */
 int hypfs_sprp_init(void);
 void hypfs_sprp_exit(void);
@@ -49,7 +53,6 @@ struct hypfs_dbfs_data {
 	void			*buf_free_ptr;
 	size_t			size;
 	struct hypfs_dbfs_file	*dbfs_file;
-	struct kref		kref;
 };
 
 struct hypfs_dbfs_file {
@@ -61,8 +64,6 @@ struct hypfs_dbfs_file {
 					   unsigned long);
 
 	/* Private data for hypfs_dbfs.c */
-	struct hypfs_dbfs_data	*data;
-	struct delayed_work	data_free_work;
 	struct mutex		lock;
 	struct dentry		*dentry;
 };

arch/s390/hypfs/hypfs_dbfs.c

@@ -17,33 +17,16 @@ static struct hypfs_dbfs_data *hypfs_dbfs_data_alloc(struct hypfs_dbfs_file *f)
 	data = kmalloc(sizeof(*data), GFP_KERNEL);
 	if (!data)
 		return NULL;
-	kref_init(&data->kref);
 	data->dbfs_file = f;
 	return data;
 }
 
-static void hypfs_dbfs_data_free(struct kref *kref)
+static void hypfs_dbfs_data_free(struct hypfs_dbfs_data *data)
 {
-	struct hypfs_dbfs_data *data;
-
-	data = container_of(kref, struct hypfs_dbfs_data, kref);
 	data->dbfs_file->data_free(data->buf_free_ptr);
 	kfree(data);
 }
 
-static void data_free_delayed(struct work_struct *work)
-{
-	struct hypfs_dbfs_data *data;
-	struct hypfs_dbfs_file *df;
-
-	df = container_of(work, struct hypfs_dbfs_file, data_free_work.work);
-	mutex_lock(&df->lock);
-	data = df->data;
-	df->data = NULL;
-	mutex_unlock(&df->lock);
-	kref_put(&data->kref, hypfs_dbfs_data_free);
-}
-
 static ssize_t dbfs_read(struct file *file, char __user *buf,
 			 size_t size, loff_t *ppos)
 {
@@ -56,28 +39,21 @@ static ssize_t dbfs_read(struct file *file, char __user *buf,
 
 	df = file_inode(file)->i_private;
 	mutex_lock(&df->lock);
-	if (!df->data) {
-		data = hypfs_dbfs_data_alloc(df);
-		if (!data) {
-			mutex_unlock(&df->lock);
-			return -ENOMEM;
-		}
-		rc = df->data_create(&data->buf, &data->buf_free_ptr,
-				     &data->size);
-		if (rc) {
-			mutex_unlock(&df->lock);
-			kfree(data);
-			return rc;
-		}
-		df->data = data;
-		schedule_delayed_work(&df->data_free_work, HZ);
+	data = hypfs_dbfs_data_alloc(df);
+	if (!data) {
+		mutex_unlock(&df->lock);
+		return -ENOMEM;
+	}
+	rc = df->data_create(&data->buf, &data->buf_free_ptr, &data->size);
+	if (rc) {
+		mutex_unlock(&df->lock);
+		kfree(data);
+		return rc;
 	}
-	data = df->data;
-	kref_get(&data->kref);
 	mutex_unlock(&df->lock);
 
 	rc = simple_read_from_buffer(buf, size, ppos, data->buf, data->size);
-	kref_put(&data->kref, hypfs_dbfs_data_free);
+	hypfs_dbfs_data_free(data);
 	return rc;
 }
 
@@ -108,7 +84,6 @@ int hypfs_dbfs_create_file(struct hypfs_dbfs_file *df)
 	if (IS_ERR(df->dentry))
 		return PTR_ERR(df->dentry);
 	mutex_init(&df->lock);
-	INIT_DELAYED_WORK(&df->data_free_work, data_free_delayed);
 	return 0;
 }
 

arch/s390/hypfs/hypfs_diag0c.c

@@ -0,0 +1,139 @@
+/*
+ * Hypervisor filesystem for Linux on s390
+ *
+ * Diag 0C implementation
+ *
+ * Copyright IBM Corp. 2014
+ */
+
+#include <linux/slab.h>
+#include <linux/cpu.h>
+#include <asm/hypfs.h>
+#include "hypfs.h"
+
+#define DBFS_D0C_HDR_VERSION 0
+
+/*
+ * Execute diagnose 0c in 31 bit mode
+ */
+static void diag0c(struct hypfs_diag0c_entry *entry)
+{
+	asm volatile (
+#ifdef CONFIG_64BIT
+		"	sam31\n"
+		"	diag	%0,%0,0x0c\n"
+		"	sam64\n"
+#else
+		"	diag %0,%0,0x0c\n"
+#endif
+		: /* no output register */
+		: "a" (entry)
+		: "memory");
+}
+
+/*
+ * Get hypfs_diag0c_entry from CPU vector and store diag0c data
+ */
+static void diag0c_fn(void *data)
+{
+	diag0c(((void **) data)[smp_processor_id()]);
+}
+
+/*
+ * Allocate buffer and store diag 0c data
+ */
+static void *diag0c_store(unsigned int *count)
+{
+	struct hypfs_diag0c_data *diag0c_data;
+	unsigned int cpu_count, cpu, i;
+	void **cpu_vec;
+
+	get_online_cpus();
+	cpu_count = num_online_cpus();
+	cpu_vec = kmalloc(sizeof(*cpu_vec) * num_possible_cpus(), GFP_KERNEL);
+	if (!cpu_vec)
+		goto fail_put_online_cpus;
+	/* Note: Diag 0c needs 8 byte alignment and real storage */
+	diag0c_data = kzalloc(sizeof(struct hypfs_diag0c_hdr) +
+			      cpu_count * sizeof(struct hypfs_diag0c_entry),
+			      GFP_KERNEL | GFP_DMA);
+	if (!diag0c_data)
+		goto fail_kfree_cpu_vec;
+	i = 0;
+	/* Fill CPU vector for each online CPU */
+	for_each_online_cpu(cpu) {
+		diag0c_data->entry[i].cpu = cpu;
+		cpu_vec[cpu] = &diag0c_data->entry[i++];
+	}
+	/* Collect data all CPUs */
+	on_each_cpu(diag0c_fn, cpu_vec, 1);
+	*count = cpu_count;
+	kfree(cpu_vec);
+	put_online_cpus();
+	return diag0c_data;
+
+fail_kfree_cpu_vec:
+	kfree(cpu_vec);
+fail_put_online_cpus:
+	put_online_cpus();
+	return ERR_PTR(-ENOMEM);
+}
+
+/*
+ * Hypfs DBFS callback: Free diag 0c data
+ */
+static void dbfs_diag0c_free(const void *data)
+{
+	kfree(data);
+}
+
+/*
+ * Hypfs DBFS callback: Create diag 0c data
+ */
+static int dbfs_diag0c_create(void **data, void **data_free_ptr, size_t *size)
+{
+	struct hypfs_diag0c_data *diag0c_data;
+	unsigned int count;
+
+	diag0c_data = diag0c_store(&count);
+	if (IS_ERR(diag0c_data))
+		return PTR_ERR(diag0c_data);
+	memset(&diag0c_data->hdr, 0, sizeof(diag0c_data->hdr));
+	get_tod_clock_ext(diag0c_data->hdr.tod_ext);
+	diag0c_data->hdr.len = count * sizeof(struct hypfs_diag0c_entry);
+	diag0c_data->hdr.version = DBFS_D0C_HDR_VERSION;
+	diag0c_data->hdr.count = count;
+	*data = diag0c_data;
+	*data_free_ptr = diag0c_data;
+	*size = diag0c_data->hdr.len + sizeof(struct hypfs_diag0c_hdr);
+	return 0;
+}
+
+/*
+ * Hypfs DBFS file structure
+ */
+static struct hypfs_dbfs_file dbfs_file_0c = {
+	.name		= "diag_0c",
+	.data_create	= dbfs_diag0c_create,
+	.data_free	= dbfs_diag0c_free,
+};
+
+/*
+ * Initialize diag 0c interface for z/VM
+ */
+int __init hypfs_diag0c_init(void)
+{
+	if (!MACHINE_IS_VM)
+		return 0;
+	return hypfs_dbfs_create_file(&dbfs_file_0c);
+}
+
+/*
+ * Shutdown diag 0c interface for z/VM
+ */
+void hypfs_diag0c_exit(void)
+{
+	if (!MACHINE_IS_VM)
+		return;
+	hypfs_dbfs_remove_file(&dbfs_file_0c);
+}

arch/s390/hypfs/inode.c

@@ -482,10 +482,14 @@ static int __init hypfs_init(void)
 		rc = -ENODATA;
 		goto fail_hypfs_vm_exit;
 	}
+	if (hypfs_diag0c_init()) {
+		rc = -ENODATA;
+		goto fail_hypfs_sprp_exit;
+	}
 	s390_kobj = kobject_create_and_add("s390", hypervisor_kobj);
 	if (!s390_kobj) {
 		rc = -ENOMEM;
-		goto fail_hypfs_sprp_exit;
+		goto fail_hypfs_diag0c_exit;
 	}
 	rc = register_filesystem(&hypfs_type);
 	if (rc)
@@ -494,6 +498,8 @@ static int __init hypfs_init(void)
 
 fail_filesystem:
 	kobject_put(s390_kobj);
+fail_hypfs_diag0c_exit:
+	hypfs_diag0c_exit();
 fail_hypfs_sprp_exit:
 	hypfs_sprp_exit();
 fail_hypfs_vm_exit:
@@ -510,6 +516,7 @@ static void __exit hypfs_exit(void)
 {
 	unregister_filesystem(&hypfs_type);
 	kobject_put(s390_kobj);
+	hypfs_diag0c_exit();
 	hypfs_sprp_exit();
 	hypfs_vm_exit();
 	hypfs_diag_exit();

arch/s390/include/asm/cpu_mf.h

@@ -189,6 +189,20 @@ static inline int ecctr(u64 ctr, u64 *val)
 	return cc;
 }
 
+/* Store CPU counter multiple for the MT utilization counter set */
+static inline int stcctm5(u64 num, u64 *val)
+{
+	typedef struct { u64 _[num]; } addrtype;
+	int cc;
+
+	asm volatile (
+		"	.insn	rsy,0xeb0000000017,%2,5,%1\n"
+		"	ipm	%0\n"
+		"	srl	%0,28\n"
+		: "=d" (cc), "=Q" (*(addrtype *) val)  : "d" (num) : "cc");
+	return cc;
+}
+
 /* Query sampling information */
 static inline int qsi(struct hws_qsi_info_block *info)
 {

arch/s390/include/asm/elf.h

@@ -163,8 +163,8 @@ extern unsigned int vdso_enabled;
    the loader.  We need to make sure that it is out of the way of the program
    that it will "exec", and that there is sufficient room for the brk.  */
 
-extern unsigned long randomize_et_dyn(unsigned long base);
-#define ELF_ET_DYN_BASE		(randomize_et_dyn(STACK_TOP / 3 * 2))
+extern unsigned long randomize_et_dyn(void);
+#define ELF_ET_DYN_BASE		randomize_et_dyn()
 
 /* This yields a mask that user programs can use to figure out what
    instruction set this CPU supports. */
@@ -209,7 +209,9 @@ do {								\
 } while (0)
 #endif /* CONFIG_COMPAT */
 
-#define STACK_RND_MASK	0x7ffUL
+extern unsigned long mmap_rnd_mask;
+
+#define STACK_RND_MASK	(mmap_rnd_mask)
 
 #define ARCH_DLINFO							    \
 do {									    \

arch/s390/include/asm/ftrace.h

@@ -3,8 +3,12 @@
 
 #define ARCH_SUPPORTS_FTRACE_OPS 1
 
+#ifdef CC_USING_HOTPATCH
+#define MCOUNT_INSN_SIZE	6
+#else
 #define MCOUNT_INSN_SIZE	24
 #define MCOUNT_RETURN_FIXUP	18
+#endif
 
 #ifndef __ASSEMBLY__
 
@@ -37,17 +41,28 @@ struct ftrace_insn {
 static inline void ftrace_generate_nop_insn(struct ftrace_insn *insn)
 {
 #ifdef CONFIG_FUNCTION_TRACER
+#ifdef CC_USING_HOTPATCH
+	/* 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
+#ifdef CC_USING_HOTPATCH
+	if (insn->disp == 0)
+		return 1;
+#else
 	if (insn->disp == MCOUNT_INSN_SIZE / 2)
 		return 1;
+#endif
 #endif
 	return 0;
 }

arch/s390/include/asm/jump_label.h

@@ -4,6 +4,7 @@
 #include <linux/types.h>
 
 #define JUMP_LABEL_NOP_SIZE 6
+#define JUMP_LABEL_NOP_OFFSET 2
 
 #ifdef CONFIG_64BIT
 #define ASM_PTR ".quad"
@@ -13,9 +14,13 @@
 #define ASM_ALIGN ".balign 4"
 #endif
 
+/*
+ * We use a brcl 0,2 instruction for jump labels at compile time so it
+ * can be easily distinguished from a hotpatch generated instruction.
+ */
 static __always_inline bool arch_static_branch(struct static_key *key)
 {
-	asm_volatile_goto("0:	brcl 0,0\n"
+	asm_volatile_goto("0:	brcl 0,"__stringify(JUMP_LABEL_NOP_OFFSET)"\n"
 		".pushsection __jump_table, \"aw\"\n"
 		ASM_ALIGN "\n"
 		ASM_PTR " 0b, %l[label], %0\n"