Merge git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc

* git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (25 commits)
  powerpc: Fix config dependency problem with MPIC_U3_HT_IRQS
  via-pmu: Add compat_pmu_ioctl
  powerpc: Wire up fanotify_init, fanotify_mark, prlimit64 syscalls
  powerpc/pci: Fix checking for child bridges in PCI code.
  powerpc: Fix typo in uImage target
  powerpc: Initialise paca->kstack before early_setup_secondary
  powerpc: Fix bogus it_blocksize in VIO iommu code
  powerpc: Inline ppc64_runlatch_off
  powerpc: Correct smt_enabled=X boot option for > 2 threads per core
  powerpc: Silence xics_migrate_irqs_away() during cpu offline
  powerpc: Silence __cpu_up() under normal operation
  powerpc: Re-enable preemption before cpu_die()
  powerpc/pci: Drop unnecessary null test
  powerpc/powermac: Drop unnecessary null test
  powerpc/powermac: Drop unnecessary of_node_put
  powerpc/kdump: Stop all other CPUs before running crash handlers
  powerpc/mm: Fix vsid_scrample typo
  powerpc: Use is_32bit_task() helper to test 32 bit binary
  powerpc: Export memstart_addr and kernstart_addr on ppc64
  powerpc: Make rwsem use "long" type
  ...

13 files changed, 93 insertions, 69 deletions

diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index 65e2b4e10f97..1f9123f412ec 100644
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -1826,7 +1826,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
                 .cpu_features           = CPU_FTRS_47X,
                 .cpu_user_features      = COMMON_USER_BOOKE |
                         PPC_FEATURE_HAS_FPU,
-                .cpu_user_features      = COMMON_USER_BOOKE,
                 .mmu_features           = MMU_FTR_TYPE_47x |
                         MMU_FTR_USE_TLBIVAX_BCAST | MMU_FTR_LOCK_BCAST_INVAL,
                 .icache_bsize           = 32,
diff --git a/arch/powerpc/kernel/crash.c b/arch/powerpc/kernel/crash.c
index 417f7b05a9ce..4457382f8667 100644
--- a/arch/powerpc/kernel/crash.c
+++ b/arch/powerpc/kernel/crash.c
@@ -402,6 +402,18 @@ void default_machine_crash_shutdown(struct pt_regs *regs)
          */
         hard_irq_disable();
 
+        /*
+         * Make a note of crashing cpu. Will be used in machine_kexec
+         * such that another IPI will not be sent.
+         */
+        crashing_cpu = smp_processor_id();
+        crash_save_cpu(regs, crashing_cpu);
+        crash_kexec_prepare_cpus(crashing_cpu);
+        cpu_set(crashing_cpu, cpus_in_crash);
+#if defined(CONFIG_PPC_STD_MMU_64) && defined(CONFIG_SMP)
+        crash_kexec_wait_realmode(crashing_cpu);
+#endif
+
         for_each_irq(i) {
                 struct irq_desc *desc = irq_to_desc(i);
 
@@ -438,18 +450,8 @@ void default_machine_crash_shutdown(struct pt_regs *regs)
         crash_shutdown_cpu = -1;
         __debugger_fault_handler = old_handler;
 
-        /*
-         * Make a note of crashing cpu. Will be used in machine_kexec
-         * such that another IPI will not be sent.
-         */
-        crashing_cpu = smp_processor_id();
-        crash_save_cpu(regs, crashing_cpu);
-        crash_kexec_prepare_cpus(crashing_cpu);
-        cpu_set(crashing_cpu, cpus_in_crash);
         crash_kexec_stop_spus();
-#if defined(CONFIG_PPC_STD_MMU_64) && defined(CONFIG_SMP)
-        crash_kexec_wait_realmode(crashing_cpu);
-#endif
+
         if (ppc_md.kexec_cpu_down)
                 ppc_md.kexec_cpu_down(1, 0);
 }
diff --git a/arch/powerpc/kernel/head_44x.S b/arch/powerpc/kernel/head_44x.S
index 5ab484ef06a7..562305b40a8e 100644
--- a/arch/powerpc/kernel/head_44x.S
+++ b/arch/powerpc/kernel/head_44x.S
@@ -113,6 +113,10 @@ _ENTRY(_start);
         stw     r5, 0(r4)       /* Save abatron_pteptrs at a fixed location */
         stw     r6, 0(r5)
 
+        /* Clear the Machine Check Syndrome Register */
+        li      r0,0
+        mtspr   SPRN_MCSR,r0
+
         /* Let's move on */
         lis     r4,start_kernel@h
         ori     r4,r4,start_kernel@l
diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S
index 844a44b64472..4d6681dce816 100644
--- a/arch/powerpc/kernel/head_64.S
+++ b/arch/powerpc/kernel/head_64.S
@@ -572,9 +572,6 @@ __secondary_start:
         /* Set thread priority to MEDIUM */
         HMT_MEDIUM
 
-        /* Do early setup for that CPU (stab, slb, hash table pointer) */
-        bl      .early_setup_secondary
-
         /* Initialize the kernel stack.  Just a repeat for iSeries.      */
         LOAD_REG_ADDR(r3, current_set)
         sldi    r28,r24,3               /* get current_set[cpu#]         */
@@ -582,6 +579,9 @@ __secondary_start:
         addi    r1,r1,THREAD_SIZE-STACK_FRAME_OVERHEAD
         std     r1,PACAKSAVE(r13)
 
+        /* Do early setup for that CPU (stab, slb, hash table pointer) */
+        bl      .early_setup_secondary
+
         /* Clear backchain so we get nice backtraces */
         li      r7,0
         mtlr    r7
diff --git a/arch/powerpc/kernel/idle.c b/arch/powerpc/kernel/idle.c
index 049dda60e475..39a2baa6ad58 100644
--- a/arch/powerpc/kernel/idle.c
+++ b/arch/powerpc/kernel/idle.c
@@ -94,9 +94,9 @@ void cpu_idle(void)
                 HMT_medium();
                 ppc64_runlatch_on();
                 tick_nohz_restart_sched_tick();
+                preempt_enable_no_resched();
                 if (cpu_should_die())
                         cpu_die();
-                preempt_enable_no_resched();
                 schedule();
                 preempt_disable();
         }
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index d3ce67cf03be..4a65386995d7 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -67,6 +67,7 @@
 #include <asm/machdep.h>
 #include <asm/udbg.h>
 #include <asm/dbell.h>
+#include <asm/smp.h>
 
 #ifdef CONFIG_PPC64
 #include <asm/paca.h>
@@ -446,22 +447,23 @@ struct thread_info *mcheckirq_ctx[NR_CPUS] __read_mostly;
 void exc_lvl_ctx_init(void)
 {
         struct thread_info *tp;
-        int i;
+        int i, hw_cpu;
 
         for_each_possible_cpu(i) {
-                memset((void *)critirq_ctx[i], 0, THREAD_SIZE);
-                tp = critirq_ctx[i];
+                hw_cpu = get_hard_smp_processor_id(i);
+                memset((void *)critirq_ctx[hw_cpu], 0, THREAD_SIZE);
+                tp = critirq_ctx[hw_cpu];
                 tp->cpu = i;
                 tp->preempt_count = 0;
 
 #ifdef CONFIG_BOOKE
-                memset((void *)dbgirq_ctx[i], 0, THREAD_SIZE);
-                tp = dbgirq_ctx[i];
+                memset((void *)dbgirq_ctx[hw_cpu], 0, THREAD_SIZE);
+                tp = dbgirq_ctx[hw_cpu];
                 tp->cpu = i;
                 tp->preempt_count = 0;
 
-                memset((void *)mcheckirq_ctx[i], 0, THREAD_SIZE);
-                tp = mcheckirq_ctx[i];
+                memset((void *)mcheckirq_ctx[hw_cpu], 0, THREAD_SIZE);
+                tp = mcheckirq_ctx[hw_cpu];
                 tp->cpu = i;
                 tp->preempt_count = HARDIRQ_OFFSET;
 #endif
diff --git a/arch/powerpc/kernel/pci_of_scan.c b/arch/powerpc/kernel/pci_of_scan.c
index 6ddb795f83e8..e751506323b4 100644
--- a/arch/powerpc/kernel/pci_of_scan.c
+++ b/arch/powerpc/kernel/pci_of_scan.c
@@ -336,7 +336,7 @@ static void __devinit __of_scan_bus(struct device_node *node,
                 if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
                     dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) {
                         struct device_node *child = pci_device_to_OF_node(dev);
-                        if (dev)
+                        if (child)
                                 of_scan_pci_bridge(child, dev);
                 }
         }
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 91356ffda2ca..b1c648a36b03 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -728,7 +728,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
                 p->thread.regs = childregs;
                 if (clone_flags & CLONE_SETTLS) {
 #ifdef CONFIG_PPC64
-                        if (!test_thread_flag(TIF_32BIT))
+                        if (!is_32bit_task())
                                 childregs->gpr[13] = childregs->gpr[6];
                         else
 #endif
@@ -823,7 +823,7 @@ void start_thread(struct pt_regs *regs, unsigned long start, unsigned long sp)
         regs->nip = start;
         regs->msr = MSR_USER;
 #else
-        if (!test_thread_flag(TIF_32BIT)) {
+        if (!is_32bit_task()) {
                 unsigned long entry, toc;
 
                 /* start is a relocated pointer to the function descriptor for
@@ -995,7 +995,7 @@ int sys_clone(unsigned long clone_flags, unsigned long usp,
         if (usp == 0)
                 usp = regs->gpr[1];     /* stack pointer for child */
 #ifdef CONFIG_PPC64
-        if (test_thread_flag(TIF_32BIT)) {
+        if (is_32bit_task()) {
                 parent_tidp = TRUNC_PTR(parent_tidp);
                 child_tidp = TRUNC_PTR(child_tidp);
         }
@@ -1199,19 +1199,17 @@ void ppc64_runlatch_on(void)
         }
 }
 
-void ppc64_runlatch_off(void)
+void __ppc64_runlatch_off(void)
 {
         unsigned long ctrl;
 
-        if (cpu_has_feature(CPU_FTR_CTRL) && test_thread_flag(TIF_RUNLATCH)) {
-                HMT_medium();
+        HMT_medium();
 
-                clear_thread_flag(TIF_RUNLATCH);
+        clear_thread_flag(TIF_RUNLATCH);
 
-                ctrl = mfspr(SPRN_CTRLF);
-                ctrl &= ~CTRL_RUNLATCH;
-                mtspr(SPRN_CTRLT, ctrl);
-        }
+        ctrl = mfspr(SPRN_CTRLF);
+        ctrl &= ~CTRL_RUNLATCH;
+        mtspr(SPRN_CTRLT, ctrl);
 }
 #endif
 
diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c
index a10ffc85ada7..93666f9cabf1 100644
--- a/arch/powerpc/kernel/setup_32.c
+++ b/arch/powerpc/kernel/setup_32.c
@@ -258,17 +258,18 @@ static void __init irqstack_early_init(void)
 #if defined(CONFIG_BOOKE) || defined(CONFIG_40x)
 static void __init exc_lvl_early_init(void)
 {
-        unsigned int i;
+        unsigned int i, hw_cpu;
 
         /* interrupt stacks must be in lowmem, we get that for free on ppc32
          * as the memblock is limited to lowmem by MEMBLOCK_REAL_LIMIT */
         for_each_possible_cpu(i) {
-                critirq_ctx[i] = (struct thread_info *)
+                hw_cpu = get_hard_smp_processor_id(i);
+                critirq_ctx[hw_cpu] = (struct thread_info *)
                         __va(memblock_alloc(THREAD_SIZE, THREAD_SIZE));
 #ifdef CONFIG_BOOKE
-                dbgirq_ctx[i] = (struct thread_info *)
+                dbgirq_ctx[hw_cpu] = (struct thread_info *)
                         __va(memblock_alloc(THREAD_SIZE, THREAD_SIZE));
-                mcheckirq_ctx[i] = (struct thread_info *)
+                mcheckirq_ctx[hw_cpu] = (struct thread_info *)
                         __va(memblock_alloc(THREAD_SIZE, THREAD_SIZE));
 #endif
         }
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 1bee4b68fa45..e72690ec9b87 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -95,7 +95,7 @@ int ucache_bsize;
 
 #ifdef CONFIG_SMP
 
-static int smt_enabled_cmdline;
+static char *smt_enabled_cmdline;
 
 /* Look for ibm,smt-enabled OF option */
 static void check_smt_enabled(void)
@@ -103,37 +103,46 @@ static void check_smt_enabled(void)
         struct device_node *dn;
         const char *smt_option;
 
-        /* Allow the command line to overrule the OF option */
-        if (smt_enabled_cmdline)
-                return;
-
-        dn = of_find_node_by_path("/options");
-
-        if (dn) {
-                smt_option = of_get_property(dn, "ibm,smt-enabled", NULL);
+        /* Default to enabling all threads */
+        smt_enabled_at_boot = threads_per_core;
 
-                if (smt_option) {
-                        if (!strcmp(smt_option, "on"))
-                                smt_enabled_at_boot = 1;
-                        else if (!strcmp(smt_option, "off"))
-                                smt_enabled_at_boot = 0;
-                }
-        }
+        /* Allow the command line to overrule the OF option */
+        if (smt_enabled_cmdline) {
+                if (!strcmp(smt_enabled_cmdline, "on"))
+                        smt_enabled_at_boot = threads_per_core;
+                else if (!strcmp(smt_enabled_cmdline, "off"))
+                        smt_enabled_at_boot = 0;
+                else {
+                        long smt;
+                        int rc;
+
+                        rc = strict_strtol(smt_enabled_cmdline, 10, &smt);
+                        if (!rc)
+                                smt_enabled_at_boot =
+                                        min(threads_per_core, (int)smt);
+                }
+        } else {
+                dn = of_find_node_by_path("/options");
+                if (dn) {
+                        smt_option = of_get_property(dn, "ibm,smt-enabled",
+                                                     NULL);
+
+                        if (smt_option) {
+                                if (!strcmp(smt_option, "on"))
+                                        smt_enabled_at_boot = threads_per_core;
+                                else if (!strcmp(smt_option, "off"))
+                                        smt_enabled_at_boot = 0;
+                        }
+
+                        of_node_put(dn);
+                }
+        }
 }
 
 /* Look for smt-enabled= cmdline option */
 static int __init early_smt_enabled(char *p)
 {
-        smt_enabled_cmdline = 1;
-
-        if (!p)
-                return 0;
-
-        if (!strcmp(p, "on") || !strcmp(p, "1"))
-                smt_enabled_at_boot = 1;
-        else if (!strcmp(p, "off") || !strcmp(p, "0"))
-                smt_enabled_at_boot = 0;
-
+        smt_enabled_cmdline = p;
         return 0;
 }
 early_param("smt-enabled", early_smt_enabled);
@@ -380,8 +389,8 @@ void __init setup_system(void)
          */
         xmon_setup();
 
-        check_smt_enabled();
         smp_setup_cpu_maps();
+        check_smt_enabled();
 
 #ifdef CONFIG_SMP
         /* Release secondary cpus out of their spinloops at 0x60 now that
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index a61b3ddd7bb3..0008bc58e826 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -427,11 +427,11 @@ int __cpuinit __cpu_up(unsigned int cpu)
 #endif
 
         if (!cpu_callin_map[cpu]) {
-                printk("Processor %u is stuck.\n", cpu);
+                printk(KERN_ERR "Processor %u is stuck.\n", cpu);
                 return -ENOENT;
         }
 
-        printk("Processor %u found.\n", cpu);
+        DBG("Processor %u found.\n", cpu);
 
         if (smp_ops->give_timebase)
                 smp_ops->give_timebase();
diff --git a/arch/powerpc/kernel/sys_ppc32.c b/arch/powerpc/kernel/sys_ppc32.c
index 20fd701a686a..b1b6043a56c4 100644
--- a/arch/powerpc/kernel/sys_ppc32.c
+++ b/arch/powerpc/kernel/sys_ppc32.c
@@ -616,3 +616,11 @@ asmlinkage long compat_sys_sync_file_range2(int fd, unsigned int flags,
 
         return sys_sync_file_range(fd, offset, nbytes, flags);
 }
+
+asmlinkage long compat_sys_fanotify_mark(int fanotify_fd, unsigned int flags,
+                                         unsigned mask_hi, unsigned mask_lo,
+                                         int dfd, const char __user *pathname)
+{
+        u64 mask = ((u64)mask_hi << 32) | mask_lo;
+        return sys_fanotify_mark(fanotify_fd, flags, mask, dfd, pathname);
+}
diff --git a/arch/powerpc/kernel/vio.c b/arch/powerpc/kernel/vio.c
index 00b9436f7652..fa3469ddaef8 100644
--- a/arch/powerpc/kernel/vio.c
+++ b/arch/powerpc/kernel/vio.c
@@ -1059,7 +1059,7 @@ static struct iommu_table *vio_build_iommu_table(struct vio_dev *dev)
         if (!dma_window)
                 return NULL;
 
-        tbl = kmalloc(sizeof(*tbl), GFP_KERNEL);
+        tbl = kzalloc(sizeof(*tbl), GFP_KERNEL);
         if (tbl == NULL)
                 return NULL;
 
@@ -1072,6 +1072,7 @@ static struct iommu_table *vio_build_iommu_table(struct vio_dev *dev)
         tbl->it_offset = offset >> IOMMU_PAGE_SHIFT;
         tbl->it_busno = 0;
         tbl->it_type = TCE_VB;
+        tbl->it_blocksize = 16;
 
         return iommu_init_table(tbl, -1);
 }