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

* 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6: (56 commits)
  [S390] replace lock_cpu_hotplug with get_online_cpus
  [S390] usage of s390dbf: shrink number of debug areas to use.
  [S390] constify function pointer tables.
  [S390] do local_irq_restore while spinning in spin_lock_irqsave.
  [S390] add smp_call_function_mask
  [S390] dasd: fix loop in request expiration handling
  [S390] Unused field / extern declaration in processor.h
  [S390] Remove TOPDIR from Makefile
  [S390] dasd: add hyper PAV support to DASD device driver, part 1
  [S390] single-step cleanup
  [S390] Move NOTES and BUG_TABLE.
  [S390] drivers/s390/: Spelling fixes
  [S390] include/asm-s390/: Spelling fixes
  [S390] arch/s390/: Spelling fixes
  [S390] Use diag308 subcodes 3 and 6 for reboot and dump when possible.
  [S390] vmemmap: allocate struct pages before 1:1 mapping
  [S390] Initialize sclp_ipl_info
  [S390] Allocate and free cpu lowcores and stacks when needed/possible.
  [S390] use LIST_HEAD instead of LIST_HEAD_INIT
  [S390] Load disabled wait psw instead of stopping cpu on halt.
  ...

16 files changed, 131 insertions, 85 deletions

diff --git a/include/asm-s390/airq.h b/include/asm-s390/airq.h
new file mode 100644
index 000000000000..41d028cb52a4
--- /dev/null
+++ b/include/asm-s390/airq.h
@@ -0,0 +1,19 @@
+/*
+ *  include/asm-s390/airq.h
+ *
+ *    Copyright IBM Corp. 2002,2007
+ *    Author(s): Ingo Adlung <adlung@de.ibm.com>
+ *               Cornelia Huck <cornelia.huck@de.ibm.com>
+ *               Arnd Bergmann <arndb@de.ibm.com>
+ *               Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
+ */
+
+#ifndef _ASM_S390_AIRQ_H
+#define _ASM_S390_AIRQ_H
+
+typedef void (*adapter_int_handler_t)(void *, void *);
+
+void *s390_register_adapter_interrupt(adapter_int_handler_t, void *);
+void s390_unregister_adapter_interrupt(void *);
+
+#endif /* _ASM_S390_AIRQ_H */
diff --git a/include/asm-s390/cio.h b/include/asm-s390/cio.h
index 2f08c16e44ad..123b557c3ff4 100644
--- a/include/asm-s390/cio.h
+++ b/include/asm-s390/cio.h
@@ -24,8 +24,8 @@
  * @fmt: format
  * @pfch: prefetch
  * @isic: initial-status interruption control
- * @alcc: adress-limit checking control
- * @ssi: supress-suspended interruption
+ * @alcc: address-limit checking control
+ * @ssi: suppress-suspended interruption
  * @zcc: zero condition code
  * @ectl: extended control
  * @pno: path not operational
diff --git a/include/asm-s390/dasd.h b/include/asm-s390/dasd.h
index 604f68fa6f56..3f002e13d024 100644
--- a/include/asm-s390/dasd.h
+++ b/include/asm-s390/dasd.h
@@ -105,7 +105,7 @@ typedef struct dasd_information_t {
 } dasd_information_t;
 
 /*
- * Read Subsystem Data - Perfomance Statistics
+ * Read Subsystem Data - Performance Statistics
  */ 
 typedef struct dasd_rssd_perf_stats_t {
         unsigned char  invalid:1;
diff --git a/include/asm-s390/ipl.h b/include/asm-s390/ipl.h
index 2c40fd3a137f..c1b2e50392bb 100644
--- a/include/asm-s390/ipl.h
+++ b/include/asm-s390/ipl.h
@@ -83,6 +83,8 @@ extern u32 dump_prefix_page;
 extern unsigned int zfcpdump_prefix_array[];
 
 extern void do_reipl(void);
+extern void do_halt(void);
+extern void do_poff(void);
 extern void ipl_save_parameters(void);
 
 enum {
@@ -118,7 +120,7 @@ struct ipl_info
 };
 
 extern struct ipl_info ipl_info;
-extern void setup_ipl_info(void);
+extern void setup_ipl(void);
 
 /*
  * DIAG 308 support
@@ -141,6 +143,10 @@ enum diag308_opt {
         DIAG308_IPL_OPT_DUMP    = 0x20,
 };
 
+enum diag308_flags {
+        DIAG308_FLAGS_LP_VALID  = 0x80,
+};
+
 enum diag308_rc {
         DIAG308_RC_OK   = 1,
 };
diff --git a/include/asm-s390/mmu_context.h b/include/asm-s390/mmu_context.h
index 05b842126b99..a77d4ba3c8eb 100644
--- a/include/asm-s390/mmu_context.h
+++ b/include/asm-s390/mmu_context.h
@@ -12,10 +12,15 @@
 #include <asm/pgalloc.h>
 #include <asm-generic/mm_hooks.h>
 
-/*
- * get a new mmu context.. S390 don't know about contexts.
- */
-#define init_new_context(tsk,mm)        0
+static inline int init_new_context(struct task_struct *tsk,
+                                   struct mm_struct *mm)
+{
+        mm->context = _ASCE_TABLE_LENGTH | _ASCE_USER_BITS;
+#ifdef CONFIG_64BIT
+        mm->context |= _ASCE_TYPE_REGION3;
+#endif
+        return 0;
+}
 
 #define destroy_context(mm)             do { } while (0)
 
@@ -27,19 +32,11 @@
 
 static inline void update_mm(struct mm_struct *mm, struct task_struct *tsk)
 {
-        pgd_t *pgd = mm->pgd;
-        unsigned long asce_bits;
-
-        /* Calculate asce bits from the first pgd table entry. */
-        asce_bits = _ASCE_TABLE_LENGTH | _ASCE_USER_BITS;
-#ifdef CONFIG_64BIT
-        asce_bits |= _ASCE_TYPE_REGION3;
-#endif
-        S390_lowcore.user_asce = asce_bits | __pa(pgd);
+        S390_lowcore.user_asce = mm->context | __pa(mm->pgd);
         if (switch_amode) {
                 /* Load primary space page table origin. */
-                pgd_t *shadow_pgd = get_shadow_table(pgd) ? : pgd;
-                S390_lowcore.user_exec_asce = asce_bits | __pa(shadow_pgd);
+                pgd_t *shadow_pgd = get_shadow_table(mm->pgd) ? : mm->pgd;
+                S390_lowcore.user_exec_asce = mm->context | __pa(shadow_pgd);
                 asm volatile(LCTL_OPCODE" 1,1,%0\n"
                              : : "m" (S390_lowcore.user_exec_asce) );
         } else
diff --git a/include/asm-s390/pgtable.h b/include/asm-s390/pgtable.h
index 1f530f8a6280..79b9eab1a0c7 100644
--- a/include/asm-s390/pgtable.h
+++ b/include/asm-s390/pgtable.h
@@ -104,41 +104,27 @@ extern char empty_zero_page[PAGE_SIZE];
 
 #ifndef __ASSEMBLY__
 /*
- * Just any arbitrary offset to the start of the vmalloc VM area: the
- * current 8MB value just means that there will be a 8MB "hole" after the
- * physical memory until the kernel virtual memory starts.  That means that
- * any out-of-bounds memory accesses will hopefully be caught.
- * The vmalloc() routines leaves a hole of 4kB between each vmalloced
- * area for the same reason. ;)
- * vmalloc area starts at 4GB to prevent syscall table entry exchanging
- * from modules.
- */
-extern unsigned long vmalloc_end;
-
-#ifdef CONFIG_64BIT
-#define VMALLOC_ADDR    (max(0x100000000UL, (unsigned long) high_memory))
-#else
-#define VMALLOC_ADDR    ((unsigned long) high_memory)
-#endif
-#define VMALLOC_OFFSET  (8*1024*1024)
-#define VMALLOC_START   ((VMALLOC_ADDR + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1))
-#define VMALLOC_END     vmalloc_end
-
-/*
- * We need some free virtual space to be able to do vmalloc.
- * VMALLOC_MIN_SIZE defines the minimum size of the vmalloc
- * area. On a machine with 2GB memory we make sure that we
- * have at least 128MB free space for vmalloc. On a machine
- * with 4TB we make sure we have at least 128GB.
+ * The vmalloc area will always be on the topmost area of the kernel
+ * mapping. We reserve 96MB (31bit) / 1GB (64bit) for vmalloc,
+ * which should be enough for any sane case.
+ * By putting vmalloc at the top, we maximise the gap between physical
+ * memory and vmalloc to catch misplaced memory accesses. As a side
+ * effect, this also makes sure that 64 bit module code cannot be used
+ * as system call address.
  */
 #ifndef __s390x__
-#define VMALLOC_MIN_SIZE        0x8000000UL
-#define VMALLOC_END_INIT        0x80000000UL
+#define VMALLOC_START   0x78000000UL
+#define VMALLOC_END     0x7e000000UL
+#define VMEM_MAP_MAX    0x80000000UL
 #else /* __s390x__ */
-#define VMALLOC_MIN_SIZE        0x2000000000UL
-#define VMALLOC_END_INIT        0x40000000000UL
+#define VMALLOC_START   0x3e000000000UL
+#define VMALLOC_END     0x3e040000000UL
+#define VMEM_MAP_MAX    0x40000000000UL
 #endif /* __s390x__ */
 
+#define VMEM_MAP        ((struct page *) VMALLOC_END)
+#define VMEM_MAP_SIZE   ((VMALLOC_START / PAGE_SIZE) * sizeof(struct page))
+
 /*
  * A 31 bit pagetable entry of S390 has following format:
  *  |   PFRA          |    |  OS  |
diff --git a/include/asm-s390/processor.h b/include/asm-s390/processor.h
index 21d40a19355e..c86b982aef5a 100644
--- a/include/asm-s390/processor.h
+++ b/include/asm-s390/processor.h
@@ -59,9 +59,6 @@ extern void s390_adjust_jiffies(void);
 extern void print_cpu_info(struct cpuinfo_S390 *);
 extern int get_cpu_capability(unsigned int *);
 
-/* Lazy FPU handling on uni-processor */
-extern struct task_struct *last_task_used_math;
-
 /*
  * User space process size: 2GB for 31 bit, 4TB for 64 bit.
  */
@@ -95,7 +92,6 @@ struct thread_struct {
         unsigned long ksp;              /* kernel stack pointer             */
         mm_segment_t mm_segment;
         unsigned long prot_addr;        /* address of protection-excep.     */
-        unsigned int error_code;        /* error-code of last prog-excep.   */
         unsigned int trap_no;
         per_struct per_info;
         /* Used to give failing instruction back to user for ieee exceptions */
diff --git a/include/asm-s390/ptrace.h b/include/asm-s390/ptrace.h
index 332ee73688fc..61f6952f2e35 100644
--- a/include/asm-s390/ptrace.h
+++ b/include/asm-s390/ptrace.h
@@ -465,6 +465,14 @@ struct user_regs_struct
 #ifdef __KERNEL__
 #define __ARCH_SYS_PTRACE       1
 
+/*
+ * These are defined as per linux/ptrace.h, which see.
+ */
+#define arch_has_single_step()  (1)
+struct task_struct;
+extern void user_enable_single_step(struct task_struct *);
+extern void user_disable_single_step(struct task_struct *);
+
 #define user_mode(regs) (((regs)->psw.mask & PSW_MASK_PSTATE) != 0)
 #define instruction_pointer(regs) ((regs)->psw.addr & PSW_ADDR_INSN)
 #define regs_return_value(regs)((regs)->gprs[2])
diff --git a/include/asm-s390/qdio.h b/include/asm-s390/qdio.h
index 74db1dc10a7d..4b8ff55f680e 100644
--- a/include/asm-s390/qdio.h
+++ b/include/asm-s390/qdio.h
@@ -184,7 +184,7 @@ struct qdr {
 #endif /* QDIO_32_BIT */
         unsigned long qiba;             /* queue-information-block address */
         unsigned int  res8;             /* reserved */
-        unsigned int  qkey    :  4;     /* queue-informatio-block key */
+        unsigned int  qkey    :  4;     /* queue-information-block key */
         unsigned int  res9    : 28;     /* reserved */
 /*      union _qd {*/ /* why this? */
                 struct qdesfmt0 qdf0[126];
diff --git a/include/asm-s390/rwsem.h b/include/asm-s390/rwsem.h
index 90f4eccaa290..9d2a17971805 100644
--- a/include/asm-s390/rwsem.h
+++ b/include/asm-s390/rwsem.h
@@ -91,8 +91,8 @@ struct rw_semaphore {
 #endif
 
 #define __RWSEM_INITIALIZER(name) \
-{ RWSEM_UNLOCKED_VALUE, SPIN_LOCK_UNLOCKED, LIST_HEAD_INIT((name).wait_list) \
-  __RWSEM_DEP_MAP_INIT(name) }
+ { RWSEM_UNLOCKED_VALUE, __SPIN_LOCK_UNLOCKED((name).wait.lock), \
+   LIST_HEAD_INIT((name).wait_list) __RWSEM_DEP_MAP_INIT(name) }
 
 #define DECLARE_RWSEM(name) \
         struct rw_semaphore name = __RWSEM_INITIALIZER(name)
diff --git a/include/asm-s390/sclp.h b/include/asm-s390/sclp.h
index cb9faf1ea5cf..b5f2843013a3 100644
--- a/include/asm-s390/sclp.h
+++ b/include/asm-s390/sclp.h
@@ -27,7 +27,25 @@ struct sclp_ipl_info {
         char loadparm[LOADPARM_LEN];
 };
 
-void sclp_readinfo_early(void);
+struct sclp_cpu_entry {
+        u8 address;
+        u8 reserved0[13];
+        u8 type;
+        u8 reserved1;
+} __attribute__((packed));
+
+struct sclp_cpu_info {
+        unsigned int configured;
+        unsigned int standby;
+        unsigned int combined;
+        int has_cpu_type;
+        struct sclp_cpu_entry cpu[255];
+};
+
+int sclp_get_cpu_info(struct sclp_cpu_info *info);
+int sclp_cpu_configure(u8 cpu);
+int sclp_cpu_deconfigure(u8 cpu);
+void sclp_read_info_early(void);
 void sclp_facilities_detect(void);
 unsigned long long sclp_memory_detect(void);
 int sclp_sdias_blk_count(void);
diff --git a/include/asm-s390/smp.h b/include/asm-s390/smp.h
index 07708c07701e..c7b74326a527 100644
--- a/include/asm-s390/smp.h
+++ b/include/asm-s390/smp.h
@@ -35,8 +35,6 @@ extern void machine_restart_smp(char *);
 extern void machine_halt_smp(void);
 extern void machine_power_off_smp(void);
 
-extern void smp_setup_cpu_possible_map(void);
-
 #define NO_PROC_ID              0xFF            /* No processor magic marker */
 
 /*
@@ -92,6 +90,8 @@ extern void __cpu_die (unsigned int cpu);
 extern void cpu_die (void) __attribute__ ((noreturn));
 extern int __cpu_up (unsigned int cpu);
 
+extern int smp_call_function_mask(cpumask_t mask, void (*func)(void *),
+        void *info, int wait);
 #endif
 
 #ifndef CONFIG_SMP
@@ -103,7 +103,6 @@ static inline void smp_send_stop(void)
 
 #define hard_smp_processor_id()         0
 #define smp_cpu_not_running(cpu)        1
-#define smp_setup_cpu_possible_map()    do { } while (0)
 #endif
 
 extern union save_area *zfcpdump_save_areas[NR_CPUS + 1];
diff --git a/include/asm-s390/spinlock.h b/include/asm-s390/spinlock.h
index 3fd43826fd0b..df84ae96915f 100644
--- a/include/asm-s390/spinlock.h
+++ b/include/asm-s390/spinlock.h
@@ -53,44 +53,48 @@ _raw_compare_and_swap(volatile unsigned int *lock,
  */
 
 #define __raw_spin_is_locked(x) ((x)->owner_cpu != 0)
-#define __raw_spin_lock_flags(lock, flags) __raw_spin_lock(lock)
 #define __raw_spin_unlock_wait(lock) \
         do { while (__raw_spin_is_locked(lock)) \
                  _raw_spin_relax(lock); } while (0)
 
-extern void _raw_spin_lock_wait(raw_spinlock_t *, unsigned int pc);
-extern int _raw_spin_trylock_retry(raw_spinlock_t *, unsigned int pc);
+extern void _raw_spin_lock_wait(raw_spinlock_t *);
+extern void _raw_spin_lock_wait_flags(raw_spinlock_t *, unsigned long flags);
+extern int _raw_spin_trylock_retry(raw_spinlock_t *);
 extern void _raw_spin_relax(raw_spinlock_t *lock);
 
 static inline void __raw_spin_lock(raw_spinlock_t *lp)
 {
-        unsigned long pc = 1 | (unsigned long) __builtin_return_address(0);
         int old;
 
         old = _raw_compare_and_swap(&lp->owner_cpu, 0, ~smp_processor_id());
-        if (likely(old == 0)) {
-                lp->owner_pc = pc;
+        if (likely(old == 0))
                 return;
-        }
-        _raw_spin_lock_wait(lp, pc);
+        _raw_spin_lock_wait(lp);
+}
+
+static inline void __raw_spin_lock_flags(raw_spinlock_t *lp,
+                                         unsigned long flags)
+{
+        int old;
+
+        old = _raw_compare_and_swap(&lp->owner_cpu, 0, ~smp_processor_id());
+        if (likely(old == 0))
+                return;
+        _raw_spin_lock_wait_flags(lp, flags);
 }
 
 static inline int __raw_spin_trylock(raw_spinlock_t *lp)
 {
-        unsigned long pc = 1 | (unsigned long) __builtin_return_address(0);
         int old;
 
         old = _raw_compare_and_swap(&lp->owner_cpu, 0, ~smp_processor_id());
-        if (likely(old == 0)) {
-                lp->owner_pc = pc;
+        if (likely(old == 0))
                 return 1;
-        }
-        return _raw_spin_trylock_retry(lp, pc);
+        return _raw_spin_trylock_retry(lp);
 }
 
 static inline void __raw_spin_unlock(raw_spinlock_t *lp)
 {
-        lp->owner_pc = 0;
         _raw_compare_and_swap(&lp->owner_cpu, lp->owner_cpu, 0);
 }
                 
diff --git a/include/asm-s390/spinlock_types.h b/include/asm-s390/spinlock_types.h
index b7ac13f7aa37..654abc40de04 100644
--- a/include/asm-s390/spinlock_types.h
+++ b/include/asm-s390/spinlock_types.h
@@ -7,7 +7,6 @@
 
 typedef struct {
         volatile unsigned int owner_cpu;
-        volatile unsigned int owner_pc;
 } __attribute__ ((aligned (4))) raw_spinlock_t;
 
 #define __RAW_SPIN_LOCK_UNLOCKED        { 0 }
diff --git a/include/asm-s390/tlbflush.h b/include/asm-s390/tlbflush.h
index a69bd2490d52..70fa5ae58180 100644
--- a/include/asm-s390/tlbflush.h
+++ b/include/asm-s390/tlbflush.h
@@ -42,11 +42,11 @@ static inline void __tlb_flush_global(void)
 /*
  * Flush all tlb entries of a page table on all cpus.
  */
-static inline void __tlb_flush_idte(pgd_t *pgd)
+static inline void __tlb_flush_idte(unsigned long asce)
 {
         asm volatile(
                 "       .insn   rrf,0xb98e0000,0,%0,%1,0"
-                : : "a" (2048), "a" (__pa(pgd) & PAGE_MASK) : "cc" );
+                : : "a" (2048), "a" (asce) : "cc" );
 }
 
 static inline void __tlb_flush_mm(struct mm_struct * mm)
@@ -61,11 +61,11 @@ static inline void __tlb_flush_mm(struct mm_struct * mm)
          * only ran on the local cpu.
          */
         if (MACHINE_HAS_IDTE) {
-                pgd_t *shadow_pgd = get_shadow_table(mm->pgd);
+                pgd_t *shadow = get_shadow_table(mm->pgd);
 
-                if (shadow_pgd)
-                        __tlb_flush_idte(shadow_pgd);
-                __tlb_flush_idte(mm->pgd);
+                if (shadow)
+                        __tlb_flush_idte((unsigned long) shadow | mm->context);
+                __tlb_flush_idte((unsigned long) mm->pgd | mm->context);
                 return;
         }
         preempt_disable();
@@ -106,9 +106,23 @@ static inline void __tlb_flush_mm_cond(struct mm_struct * mm)
  */
 #define flush_tlb()                             do { } while (0)
 #define flush_tlb_all()                         do { } while (0)
-#define flush_tlb_mm(mm)                        __tlb_flush_mm_cond(mm)
 #define flush_tlb_page(vma, addr)               do { } while (0)
-#define flush_tlb_range(vma, start, end)        __tlb_flush_mm_cond(mm)
-#define flush_tlb_kernel_range(start, end)      __tlb_flush_mm(&init_mm)
+
+static inline void flush_tlb_mm(struct mm_struct *mm)
+{
+        __tlb_flush_mm_cond(mm);
+}
+
+static inline void flush_tlb_range(struct vm_area_struct *vma,
+                                   unsigned long start, unsigned long end)
+{
+        __tlb_flush_mm_cond(vma->vm_mm);
+}
+
+static inline void flush_tlb_kernel_range(unsigned long start,
+                                          unsigned long end)
+{
+        __tlb_flush_mm(&init_mm);
+}
 
 #endif /* _S390_TLBFLUSH_H */
diff --git a/include/asm-s390/zcrypt.h b/include/asm-s390/zcrypt.h
index a5dada617751..f228f1b86877 100644
--- a/include/asm-s390/zcrypt.h
+++ b/include/asm-s390/zcrypt.h
@@ -117,7 +117,7 @@ struct CPRBX {
         unsigned char   padx004[16 - sizeof (char *)];
         unsigned char * req_extb;       /* request extension block 'addr'*/
         unsigned char   padx005[16 - sizeof (char *)];
-        unsigned char * rpl_extb;       /* reply extension block 'addres'*/
+        unsigned char * rpl_extb;       /* reply extension block 'address'*/
         unsigned short  ccp_rtcode;     /* server return code            */
         unsigned short  ccp_rscode;     /* server reason code            */
         unsigned int    mac_data_len;   /* Mac Data Length               */