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

Pull s390 updates from Martin Schwidefsky:
 "The main bulk of the s390 patches for the 4.10 merge window:

   - Add support for the contiguous memory allocator.

   - The recovery for I/O errors in the dasd device driver is improved,
     the driver will now remove channel paths that are not working
     properly.

   - Additional fields are added to /proc/sysinfo, the extended
     partition name and the partition UUID.

   - New naming for PCI devices with system defined UIDs.

   - The last few remaining alloc_bootmem calls are converted to
     memblock.

   - The thread_info structure is stripped down and moved to the
     task_struct. The only field left in thread_info is the flags field.

   - Rework of the arch topology code to fix a fake numa issue.

   - Refactoring of the atomic primitives and add a new preempt_count
     implementation.

   - Clocksource steering for the STP sync check offsets.

   - The s390 specific headers are changed to make them usable with
     CLANG.

   - Bug fixes and cleanup"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (70 commits)
  s390/cpumf: Use configuration level indication for sampling data
  s390: provide memmove implementation
  s390: cleanup arch/s390/kernel Makefile
  s390: fix initrd corruptions with gcov/kcov instrumented kernels
  s390: exclude early C code from gcov profiling
  s390/dasd: channel path aware error recovery
  s390/dasd: extend dasd path handling
  s390: remove unused labels from entry.S
  s390/vmlogrdr: fix IUCV buffer allocation
  s390/crypto: unlock on error in prng_tdes_read()
  s390/sysinfo: show partition extended name and UUID if available
  s390/numa: pin all possible cpus to nodes early
  s390/numa: establish cpu to node mapping early
  s390/topology: use cpu_topology array instead of per cpu variable
  s390/smp: initialize cpu_present_mask in setup_arch
  s390/topology: always use s390 specific sched_domain_topology_level
  s390/smp: use smp_get_base_cpu() helper function
  s390/numa: always use logical cpu and core ids
  s390: Remove VLAIS in ptff() and clear_table()
  s390: fix machine check panic stack switch
  ...

arch/s390/kernel/smp.c

@@ -19,6 +19,7 @@
 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
 
 #include <linux/workqueue.h>
+#include <linux/bootmem.h>
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/mm.h>
@@ -259,16 +260,14 @@ static void pcpu_prepare_secondary(struct pcpu *pcpu, int cpu)
 static void pcpu_attach_task(struct pcpu *pcpu, struct task_struct *tsk)
 {
 	struct lowcore *lc = pcpu->lowcore;
-	struct thread_info *ti = task_thread_info(tsk);
 
 	lc->kernel_stack = (unsigned long) task_stack_page(tsk)
 		+ THREAD_SIZE - STACK_FRAME_OVERHEAD - sizeof(struct pt_regs);
-	lc->thread_info = (unsigned long) task_thread_info(tsk);
 	lc->current_task = (unsigned long) tsk;
 	lc->lpp = LPP_MAGIC;
 	lc->current_pid = tsk->pid;
-	lc->user_timer = ti->user_timer;
-	lc->system_timer = ti->system_timer;
+	lc->user_timer = tsk->thread.user_timer;
+	lc->system_timer = tsk->thread.system_timer;
 	lc->steal_timer = 0;
 }
 
@@ -662,14 +661,12 @@ int smp_cpu_get_polarization(int cpu)
 	return pcpu_devices[cpu].polarization;
 }
 
-static struct sclp_core_info *smp_get_core_info(void)
+static void __ref smp_get_core_info(struct sclp_core_info *info, int early)
 {
 	static int use_sigp_detection;
-	struct sclp_core_info *info;
 	int address;
 
-	info = kzalloc(sizeof(*info), GFP_KERNEL);
-	if (info && (use_sigp_detection || sclp_get_core_info(info))) {
+	if (use_sigp_detection || sclp_get_core_info(info, early)) {
 		use_sigp_detection = 1;
 		for (address = 0;
 		     address < (SCLP_MAX_CORES << smp_cpu_mt_shift);
@@ -683,7 +680,6 @@ static struct sclp_core_info *smp_get_core_info(void)
 		}
 		info->combined = info->configured;
 	}
-	return info;
 }
 
 static int smp_add_present_cpu(int cpu);
@@ -724,17 +720,15 @@ static int __smp_rescan_cpus(struct sclp_core_info *info, int sysfs_add)
 	return nr;
 }
 
-static void __init smp_detect_cpus(void)
+void __init smp_detect_cpus(void)
 {
 	unsigned int cpu, mtid, c_cpus, s_cpus;
 	struct sclp_core_info *info;
 	u16 address;
 
 	/* Get CPU information */
-	info = smp_get_core_info();
-	if (!info)
-		panic("smp_detect_cpus failed to allocate memory\n");
-
+	info = memblock_virt_alloc(sizeof(*info), 8);
+	smp_get_core_info(info, 1);
 	/* Find boot CPU type */
 	if (sclp.has_core_type) {
 		address = stap();
@@ -770,7 +764,7 @@ static void __init smp_detect_cpus(void)
 	get_online_cpus();
 	__smp_rescan_cpus(info, 0);
 	put_online_cpus();
-	kfree(info);
+	memblock_free_early((unsigned long)info, sizeof(*info));
 }
 
 /*
@@ -807,7 +801,7 @@ int __cpu_up(unsigned int cpu, struct task_struct *tidle)
 	pcpu = pcpu_devices + cpu;
 	if (pcpu->state != CPU_STATE_CONFIGURED)
 		return -EIO;
-	base = cpu - (cpu % (smp_cpu_mtid + 1));
+	base = smp_get_base_cpu(cpu);
 	for (i = 0; i <= smp_cpu_mtid; i++) {
 		if (base + i < nr_cpu_ids)
 			if (cpu_online(base + i))
@@ -907,7 +901,6 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
 	/* request the 0x1202 external call external interrupt */
 	if (register_external_irq(EXT_IRQ_EXTERNAL_CALL, do_ext_call_interrupt))
 		panic("Couldn't request external interrupt 0x1202");
-	smp_detect_cpus();
 }
 
 void __init smp_prepare_boot_cpu(void)
@@ -973,7 +966,7 @@ static ssize_t cpu_configure_store(struct device *dev,
 	rc = -EBUSY;
 	/* disallow configuration changes of online cpus and cpu 0 */
 	cpu = dev->id;
-	cpu -= cpu % (smp_cpu_mtid + 1);
+	cpu = smp_get_base_cpu(cpu);
 	if (cpu == 0)
 		goto out;
 	for (i = 0; i <= smp_cpu_mtid; i++)
@@ -1106,9 +1099,10 @@ int __ref smp_rescan_cpus(void)
 	struct sclp_core_info *info;
 	int nr;
 
-	info = smp_get_core_info();
+	info = kzalloc(sizeof(*info), GFP_KERNEL);
 	if (!info)
 		return -ENOMEM;
+	smp_get_core_info(info, 0);
 	get_online_cpus();
 	mutex_lock(&smp_cpu_state_mutex);
 	nr = __smp_rescan_cpus(info, 1);