10 files changed, 66 insertions, 52 deletions

diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 1d035082e78e..93acb3c1859d 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -308,6 +308,9 @@ config ARCH_SPARSEMEM_ENABLE
 config ARCH_SPARSEMEM_DEFAULT
         def_bool y
 
+config ARCH_SELECT_MEMORY_MODEL
+       def_bool y
+
 source "mm/Kconfig"
 
 comment "I/O subsystem configuration"
diff --git a/arch/s390/appldata/appldata_base.c b/arch/s390/appldata/appldata_base.c
index 655d52543e2d..ad40729bec3d 100644
--- a/arch/s390/appldata/appldata_base.c
+++ b/arch/s390/appldata/appldata_base.c
@@ -130,6 +130,7 @@ static void appldata_work_fn(struct work_struct *work)
 
         P_DEBUG("  -= Work Queue =-\n");
         i = 0;
+        get_online_cpus();
         spin_lock(&appldata_ops_lock);
         list_for_each(lh, &appldata_ops_list) {
                 ops = list_entry(lh, struct appldata_ops, list);
@@ -140,6 +141,7 @@ static void appldata_work_fn(struct work_struct *work)
                 }
         }
         spin_unlock(&appldata_ops_lock);
+        put_online_cpus();
 }
 
 /*
@@ -266,12 +268,14 @@ appldata_timer_handler(ctl_table *ctl, int write, struct file *filp,
         len = *lenp;
         if (copy_from_user(buf, buffer, len > sizeof(buf) ? sizeof(buf) : len))
                 return -EFAULT;
+        get_online_cpus();
         spin_lock(&appldata_timer_lock);
         if (buf[0] == '1')
                 __appldata_vtimer_setup(APPLDATA_ADD_TIMER);
         else if (buf[0] == '0')
                 __appldata_vtimer_setup(APPLDATA_DEL_TIMER);
         spin_unlock(&appldata_timer_lock);
+        put_online_cpus();
 out:
         *lenp = len;
         *ppos += len;
@@ -314,10 +318,12 @@ appldata_interval_handler(ctl_table *ctl, int write, struct file *filp,
                 return -EINVAL;
         }
 
+        get_online_cpus();
         spin_lock(&appldata_timer_lock);
         appldata_interval = interval;
         __appldata_vtimer_setup(APPLDATA_MOD_TIMER);
         spin_unlock(&appldata_timer_lock);
+        put_online_cpus();
 
         P_INFO("Monitoring CPU interval set to %u milliseconds.\n",
                  interval);
@@ -556,8 +562,10 @@ static int __init appldata_init(void)
                 return -ENOMEM;
         }
 
+        get_online_cpus();
         for_each_online_cpu(i)
                 appldata_online_cpu(i);
+        put_online_cpus();
 
         /* Register cpu hotplug notifier */
         register_hotcpu_notifier(&appldata_nb);
diff --git a/arch/s390/defconfig b/arch/s390/defconfig
index aa341d0ea1e6..c5cdb975d590 100644
--- a/arch/s390/defconfig
+++ b/arch/s390/defconfig
@@ -1,7 +1,7 @@
 #
 # Automatically generated make config: don't edit
-# Linux kernel version: 2.6.25
-# Wed Apr 30 11:07:45 2008
+# Linux kernel version: 2.6.26-rc4
+# Fri May 30 09:49:33 2008
 #
 CONFIG_SCHED_MC=y
 CONFIG_MMU=y
@@ -103,6 +103,7 @@ CONFIG_RT_MUTEXES=y
 # CONFIG_TINY_SHMEM is not set
 CONFIG_BASE_SMALL=0
 CONFIG_MODULES=y
+# CONFIG_MODULE_FORCE_LOAD is not set
 CONFIG_MODULE_UNLOAD=y
 # CONFIG_MODULE_FORCE_UNLOAD is not set
 CONFIG_MODVERSIONS=y
@@ -173,6 +174,7 @@ CONFIG_PREEMPT=y
 # CONFIG_PREEMPT_RCU is not set
 CONFIG_ARCH_SPARSEMEM_ENABLE=y
 CONFIG_ARCH_SPARSEMEM_DEFAULT=y
+CONFIG_ARCH_SELECT_MEMORY_MODEL=y
 CONFIG_SELECT_MEMORY_MODEL=y
 # CONFIG_FLATMEM_MANUAL is not set
 # CONFIG_DISCONTIGMEM_MANUAL is not set
@@ -210,6 +212,7 @@ CONFIG_FORCE_MAX_ZONEORDER=9
 CONFIG_PFAULT=y
 # CONFIG_SHARED_KERNEL is not set
 # CONFIG_CMM is not set
+# CONFIG_PAGE_STATES is not set
 CONFIG_VIRT_TIMER=y
 CONFIG_VIRT_CPU_ACCOUNTING=y
 # CONFIG_APPLDATA_BASE is not set
@@ -620,6 +623,7 @@ CONFIG_S390_VMUR=m
 #
 # CONFIG_MEMSTICK is not set
 # CONFIG_NEW_LEDS is not set
+CONFIG_ACCESSIBILITY=y
 
 #
 # File systems
@@ -754,11 +758,12 @@ CONFIG_FRAME_WARN=2048
 CONFIG_MAGIC_SYSRQ=y
 # CONFIG_UNUSED_SYMBOLS is not set
 CONFIG_DEBUG_FS=y
-CONFIG_HEADERS_CHECK=y
+# CONFIG_HEADERS_CHECK is not set
 CONFIG_DEBUG_KERNEL=y
 # CONFIG_SCHED_DEBUG is not set
 # CONFIG_SCHEDSTATS is not set
 # CONFIG_TIMER_STATS is not set
+# CONFIG_DEBUG_OBJECTS is not set
 # CONFIG_DEBUG_SLAB is not set
 CONFIG_DEBUG_PREEMPT=y
 # CONFIG_DEBUG_RT_MUTEXES is not set
diff --git a/arch/s390/kernel/debug.c b/arch/s390/kernel/debug.c
index dff0568e67ec..c93d1296cc0a 100644
--- a/arch/s390/kernel/debug.c
+++ b/arch/s390/kernel/debug.c
@@ -71,7 +71,7 @@ static ssize_t debug_input(struct file *file, const char __user *user_buf,
                         size_t user_len, loff_t * offset);
 static int debug_open(struct inode *inode, struct file *file);
 static int debug_close(struct inode *inode, struct file *file);
-static debug_info_t*  debug_info_create(char *name, int pages_per_area,
+static debug_info_t *debug_info_create(const char *name, int pages_per_area,
                         int nr_areas, int buf_size, mode_t mode);
 static void debug_info_get(debug_info_t *);
 static void debug_info_put(debug_info_t *);
@@ -234,8 +234,8 @@ fail_malloc_areas:
  */
 
 static debug_info_t*
-debug_info_alloc(char *name, int pages_per_area, int nr_areas, int buf_size,
-                int level, int mode)
+debug_info_alloc(const char *name, int pages_per_area, int nr_areas,
+                 int buf_size, int level, int mode)
 {
         debug_info_t* rc;
 
@@ -326,8 +326,8 @@ debug_info_free(debug_info_t* db_info){
  */
 
 static debug_info_t*
-debug_info_create(char *name, int pages_per_area, int nr_areas, int buf_size,
-                  mode_t mode)
+debug_info_create(const char *name, int pages_per_area, int nr_areas,
+                  int buf_size, mode_t mode)
 {
         debug_info_t* rc;
 
@@ -684,9 +684,9 @@ debug_close(struct inode *inode, struct file *file)
  * - Returns handle for debug area
  */
 
-debug_info_t *debug_register_mode(char *name, int pages_per_area, int nr_areas,
-                                  int buf_size, mode_t mode, uid_t uid,
-                                  gid_t gid)
+debug_info_t *debug_register_mode(const char *name, int pages_per_area,
+                                  int nr_areas, int buf_size, mode_t mode,
+                                  uid_t uid, gid_t gid)
 {
         debug_info_t *rc = NULL;
 
@@ -722,8 +722,8 @@ EXPORT_SYMBOL(debug_register_mode);
  * - returns handle for debug area
  */
 
-debug_info_t *debug_register(char *name, int pages_per_area, int nr_areas,
-                             int buf_size)
+debug_info_t *debug_register(const char *name, int pages_per_area,
+                             int nr_areas, int buf_size)
 {
         return debug_register_mode(name, pages_per_area, nr_areas, buf_size,
                                    S_IRUSR | S_IWUSR, 0, 0);
diff --git a/arch/s390/kernel/dis.c b/arch/s390/kernel/dis.c
index c14a336f6300..d2f270c995d9 100644
--- a/arch/s390/kernel/dis.c
+++ b/arch/s390/kernel/dis.c
@@ -208,7 +208,7 @@ static const unsigned char formats[][7] = {
         [INSTR_RRF_F0FF]  = { 0xff, F_16,F_24,F_28,0,0,0 },    /* e.g. madbr */
         [INSTR_RRF_FUFF]  = { 0xff, F_24,F_16,F_28,U4_20,0,0 },/* e.g. didbr */
         [INSTR_RRF_RURR]  = { 0xff, R_24,R_28,R_16,U4_20,0,0 },/* e.g. .insn */
-        [INSTR_RRF_R0RR]  = { 0xff, R_24,R_28,R_16,0,0,0 },    /* e.g. idte  */
+        [INSTR_RRF_R0RR]  = { 0xff, R_24,R_16,R_28,0,0,0 },    /* e.g. idte  */
         [INSTR_RRF_U0FF]  = { 0xff, F_24,U4_16,F_28,0,0,0 },   /* e.g. fixr  */
         [INSTR_RRF_U0RF]  = { 0xff, R_24,U4_16,F_28,0,0,0 },   /* e.g. cfebr */
         [INSTR_RRF_M0RR]  = { 0xff, R_24,R_28,M_16,0,0,0 },    /* e.g. sske  */
diff --git a/arch/s390/kernel/init_task.c b/arch/s390/kernel/init_task.c
index d494161b05b4..7ad003969251 100644
--- a/arch/s390/kernel/init_task.c
+++ b/arch/s390/kernel/init_task.c
@@ -17,7 +17,6 @@
 #include <asm/pgtable.h>
 
 static struct fs_struct init_fs = INIT_FS;
-static struct files_struct init_files = INIT_FILES;
 static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
 static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
 struct mm_struct init_mm = INIT_MM(init_mm);
diff --git a/arch/s390/kernel/irq.c b/arch/s390/kernel/irq.c
index c59a86dca584..e7c5bfb7c755 100644
--- a/arch/s390/kernel/irq.c
+++ b/arch/s390/kernel/irq.c
@@ -25,6 +25,7 @@ int show_interrupts(struct seq_file *p, void *v)
         static const char *intrclass_names[] = { "EXT", "I/O", };
         int i = *(loff_t *) v, j;
 
+        get_online_cpus();
         if (i == 0) {
                 seq_puts(p, "           ");
                 for_each_online_cpu(j)
@@ -43,7 +44,7 @@ int show_interrupts(struct seq_file *p, void *v)
                 seq_putc(p, '\n');
 
         }
-
+        put_online_cpus();
         return 0;
 }
 
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 0aeb290060d9..42b1d12ebb10 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -139,7 +139,6 @@ static void __smp_call_function_map(void (*func) (void *info), void *info,
         if (wait)
                 data.finished = CPU_MASK_NONE;
 
-        spin_lock(&call_lock);
         call_data = &data;
 
         for_each_cpu_mask(cpu, map)
@@ -151,7 +150,6 @@ static void __smp_call_function_map(void (*func) (void *info), void *info,
         if (wait)
                 while (!cpus_equal(map, data.finished))
                         cpu_relax();
-        spin_unlock(&call_lock);
 out:
         if (local) {
                 local_irq_disable();
@@ -177,11 +175,11 @@ int smp_call_function(void (*func) (void *info), void *info, int nonatomic,
 {
         cpumask_t map;
 
-        preempt_disable();
+        spin_lock(&call_lock);
         map = cpu_online_map;
         cpu_clear(smp_processor_id(), map);
         __smp_call_function_map(func, info, nonatomic, wait, map);
-        preempt_enable();
+        spin_unlock(&call_lock);
         return 0;
 }
 EXPORT_SYMBOL(smp_call_function);
@@ -202,10 +200,10 @@ EXPORT_SYMBOL(smp_call_function);
 int smp_call_function_single(int cpu, void (*func) (void *info), void *info,
                              int nonatomic, int wait)
 {
-        preempt_disable();
+        spin_lock(&call_lock);
         __smp_call_function_map(func, info, nonatomic, wait,
                                 cpumask_of_cpu(cpu));
-        preempt_enable();
+        spin_unlock(&call_lock);
         return 0;
 }
 EXPORT_SYMBOL(smp_call_function_single);
@@ -228,10 +226,10 @@ EXPORT_SYMBOL(smp_call_function_single);
 int smp_call_function_mask(cpumask_t mask, void (*func)(void *), void *info,
                            int wait)
 {
-        preempt_disable();
+        spin_lock(&call_lock);
         cpu_clear(smp_processor_id(), mask);
         __smp_call_function_map(func, info, 0, wait, mask);
-        preempt_enable();
+        spin_unlock(&call_lock);
         return 0;
 }
 EXPORT_SYMBOL(smp_call_function_mask);
@@ -592,7 +590,9 @@ int __cpuinit start_secondary(void *cpuvoid)
         pfault_init();
 
         /* Mark this cpu as online */
+        spin_lock(&call_lock);
         cpu_set(smp_processor_id(), cpu_online_map);
+        spin_unlock(&call_lock);
         /* Switch on interrupts */
         local_irq_enable();
         /* Print info about this processor */
@@ -1089,7 +1089,7 @@ out:
 
 #ifdef CONFIG_HOTPLUG_CPU
 
-int smp_rescan_cpus(void)
+int __ref smp_rescan_cpus(void)
 {
         cpumask_t newcpus;
         int cpu;
diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c
index 29f3a63806b9..05598649b326 100644
--- a/arch/s390/mm/init.c
+++ b/arch/s390/mm/init.c
@@ -44,37 +44,34 @@ char  empty_zero_page[PAGE_SIZE] __attribute__((__aligned__(PAGE_SIZE)));
 
 void show_mem(void)
 {
-        int i, total = 0, reserved = 0;
-        int shared = 0, cached = 0;
+        unsigned long i, total = 0, reserved = 0;
+        unsigned long shared = 0, cached = 0;
+        unsigned long flags;
         struct page *page;
+        pg_data_t *pgdat;
 
         printk("Mem-info:\n");
         show_free_areas();
-        i = max_mapnr;
-        while (i-- > 0) {
-                if (!pfn_valid(i))
-                        continue;
-                page = pfn_to_page(i);
-                total++;
-                if (PageReserved(page))
-                        reserved++;
-                else if (PageSwapCache(page))
-                        cached++;
-                else if (page_count(page))
-                        shared += page_count(page) - 1;
+        for_each_online_pgdat(pgdat) {
+                pgdat_resize_lock(pgdat, &flags);
+                for (i = 0; i < pgdat->node_spanned_pages; i++) {
+                        if (!pfn_valid(pgdat->node_start_pfn + i))
+                                continue;
+                        page = pfn_to_page(pgdat->node_start_pfn + i);
+                        total++;
+                        if (PageReserved(page))
+                                reserved++;
+                        else if (PageSwapCache(page))
+                                cached++;
+                        else if (page_count(page))
+                                shared += page_count(page) - 1;
+                }
+                pgdat_resize_unlock(pgdat, &flags);
         }
-        printk("%d pages of RAM\n", total);
-        printk("%d reserved pages\n", reserved);
-        printk("%d pages shared\n", shared);
-        printk("%d pages swap cached\n", cached);
-
-        printk("%lu pages dirty\n", global_page_state(NR_FILE_DIRTY));
-        printk("%lu pages writeback\n", global_page_state(NR_WRITEBACK));
-        printk("%lu pages mapped\n", global_page_state(NR_FILE_MAPPED));
-        printk("%lu pages slab\n",
-               global_page_state(NR_SLAB_RECLAIMABLE) +
-               global_page_state(NR_SLAB_UNRECLAIMABLE));
-        printk("%lu pages pagetables\n", global_page_state(NR_PAGETABLE));
+        printk("%ld pages of RAM\n", total);
+        printk("%ld reserved pages\n", reserved);
+        printk("%ld pages shared\n", shared);
+        printk("%ld pages swap cached\n", cached);
 }
 
 /*
diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c
index beccacf907f3..f591188fa2c0 100644
--- a/arch/s390/mm/vmem.c
+++ b/arch/s390/mm/vmem.c
@@ -60,7 +60,7 @@ static inline pmd_t *vmem_pmd_alloc(void)
         return pmd;
 }
 
-static pte_t __init_refok *vmem_pte_alloc(void)
+static pte_t __ref *vmem_pte_alloc(void)
 {
         pte_t *pte;
 
@@ -221,6 +221,7 @@ int __meminit vmemmap_populate(struct page *start, unsigned long nr, int node)
                         *pt_dir = pte;
                 }
         }
+        memset(start, 0, nr * sizeof(struct page));
         ret = 0;
 out:
         flush_tlb_kernel_range(start_addr, end_addr);