11 files changed, 93 insertions, 114 deletions

diff --git a/arch/ia64/kernel/Makefile b/arch/ia64/kernel/Makefile
index db10b1e378b0..395c2f216dd8 100644
--- a/arch/ia64/kernel/Makefile
+++ b/arch/ia64/kernel/Makefile
@@ -34,6 +34,7 @@ obj-$(CONFIG_AUDIT)		+= audit.o
 obj-$(CONFIG_PCI_MSI)           += msi_ia64.o
 mca_recovery-y                  += mca_drv.o mca_drv_asm.o
 obj-$(CONFIG_IA64_MC_ERR_INJECT)+= err_inject.o
+obj-$(CONFIG_STACKTRACE)        += stacktrace.o
 
 obj-$(CONFIG_PARAVIRT)          += paravirt.o paravirtentry.o \
                                    paravirt_patch.o
diff --git a/arch/ia64/kernel/cyclone.c b/arch/ia64/kernel/cyclone.c
index 71e35864d2e2..d52f1f78eff2 100644
--- a/arch/ia64/kernel/cyclone.c
+++ b/arch/ia64/kernel/cyclone.c
@@ -59,13 +59,13 @@ int __init init_cyclone_clock(void)
                 return -ENODEV;
         }
         base = readq(reg);
+        iounmap(reg);
         if(!base){
                 printk(KERN_ERR "Summit chipset: Could not find valid CBAR"
                                 " value.\n");
                 use_cyclone = 0;
                 return -ENODEV;
         }
-        iounmap(reg);
 
         /* setup PMCC */
         offset = (base + CYCLONE_PMCC_OFFSET);
diff --git a/arch/ia64/kernel/fsys.S b/arch/ia64/kernel/fsys.S
index 471a1e783aca..331d42bda77a 100644
--- a/arch/ia64/kernel/fsys.S
+++ b/arch/ia64/kernel/fsys.S
@@ -420,34 +420,31 @@ EX(.fail_efault, ld8 r14=[r33])			// r14 <- *set
         ;;
 
         RSM_PSR_I(p0, r18, r19)                 // mask interrupt delivery
-        mov ar.ccv=0
         andcm r14=r14,r17                       // filter out SIGKILL & SIGSTOP
+        mov r8=EINVAL                   // default to EINVAL
 
 #ifdef CONFIG_SMP
         // __ticket_spin_trylock(r31)
         ld4 r17=[r31]
-        mov r8=EINVAL                   // default to EINVAL
-        ;;
-        extr r9=r17,17,15
         ;;
-        xor r18=r17,r9
+        mov.m ar.ccv=r17
+        extr.u r9=r17,17,15
         adds r19=1,r17
+        extr.u r18=r17,0,15
         ;;
-        extr.u r18=r18,0,15
+        cmp.eq p6,p7=r9,r18
         ;;
-        cmp.eq p0,p7=0,r18
+(p6)    cmpxchg4.acq r9=[r31],r19,ar.ccv
+(p6)    dep.z r20=r19,1,15              // next serving ticket for unlock
 (p7)    br.cond.spnt.many .lock_contention
-        mov.m ar.ccv=r17
-        ;;
-        cmpxchg4.acq r9=[r31],r19,ar.ccv
         ;;
         cmp4.eq p0,p7=r9,r17
+        adds r31=2,r31
 (p7)    br.cond.spnt.many .lock_contention
         ld8 r3=[r2]                     // re-read current->blocked now that we hold the lock
         ;;
 #else
         ld8 r3=[r2]                     // re-read current->blocked now that we hold the lock
-        mov r8=EINVAL                   // default to EINVAL
 #endif
         add r18=IA64_TASK_PENDING_OFFSET+IA64_SIGPENDING_SIGNAL_OFFSET,r16
         add r19=IA64_TASK_SIGNAL_OFFSET,r16
@@ -503,16 +500,8 @@ EX(.fail_efault, ld8 r14=[r33])			// r14 <- *set
 
 #ifdef CONFIG_SMP
         // __ticket_spin_unlock(r31)
-        adds r31=2,r31
-        ;;
-        ld2.bias r2=[r31]
-        mov r3=65534
-        ;;
-        adds r2=2,r2
-        ;;
-        and r3=r3,r2
-        ;;
-        st2.rel [r31]=r3
+        st2.rel [r31]=r20
+        mov r20=0                                       // i must not leak kernel bits...
 #endif
         SSM_PSR_I(p0, p9, r31)
         ;;
@@ -535,16 +524,7 @@ EX(.fail_efault, (p15) st8 [r34]=r3)
 .sig_pending:
 #ifdef CONFIG_SMP
         // __ticket_spin_unlock(r31)
-        adds r31=2,r31
-        ;;
-        ld2.bias r2=[r31]
-        mov r3=65534
-        ;;
-        adds r2=2,r2
-        ;;
-        and r3=r3,r2
-        ;;
-        st2.rel [r31]=r3
+        st2.rel [r31]=r20                       // release the lock
 #endif
         SSM_PSR_I(p0, p9, r17)
         ;;
diff --git a/arch/ia64/kernel/iosapic.c b/arch/ia64/kernel/iosapic.c
index 7ded76658d2d..22c38404f539 100644
--- a/arch/ia64/kernel/iosapic.c
+++ b/arch/ia64/kernel/iosapic.c
@@ -108,10 +108,6 @@
 #define DBG(fmt...)
 #endif
 
-#define NR_PREALLOCATE_RTE_ENTRIES \
-        (PAGE_SIZE / sizeof(struct iosapic_rte_info))
-#define RTE_PREALLOCATED        (1)
-
 static DEFINE_SPINLOCK(iosapic_lock);
 
 /*
@@ -136,7 +132,6 @@ struct iosapic_rte_info {
         struct list_head rte_list;      /* RTEs sharing the same vector */
         char            rte_index;      /* IOSAPIC RTE index */
         int             refcnt;         /* reference counter */
-        unsigned int    flags;          /* flags */
         struct iosapic  *iosapic;
 } ____cacheline_aligned;
 
@@ -155,9 +150,6 @@ static struct iosapic_intr_info {
 
 static unsigned char pcat_compat __devinitdata; /* 8259 compatibility flag */
 
-static int iosapic_kmalloc_ok;
-static LIST_HEAD(free_rte_list);
-
 static inline void
 iosapic_write(struct iosapic *iosapic, unsigned int reg, u32 val)
 {
@@ -394,7 +386,7 @@ iosapic_startup_level_irq (unsigned int irq)
 }
 
 static void
-iosapic_end_level_irq (unsigned int irq)
+iosapic_unmask_level_irq (unsigned int irq)
 {
         ia64_vector vec = irq_to_vector(irq);
         struct iosapic_rte_info *rte;
@@ -404,7 +396,8 @@ iosapic_end_level_irq (unsigned int irq)
         if (unlikely(irq_desc[irq].status & IRQ_MOVE_PENDING)) {
                 do_unmask_irq = 1;
                 mask_irq(irq);
-        }
+        } else
+                unmask_irq(irq);
 
         list_for_each_entry(rte, &iosapic_intr_info[irq].rtes, rte_list)
                 iosapic_eoi(rte->iosapic->addr, vec);
@@ -427,9 +420,8 @@ static struct irq_chip irq_type_iosapic_level = {
         .enable =       iosapic_enable_level_irq,
         .disable =      iosapic_disable_level_irq,
         .ack =          iosapic_ack_level_irq,
-        .end =          iosapic_end_level_irq,
         .mask =         mask_irq,
-        .unmask =       unmask_irq,
+        .unmask =       iosapic_unmask_level_irq,
         .set_affinity = iosapic_set_affinity
 };
 
@@ -552,37 +544,6 @@ iosapic_reassign_vector (int irq)
         }
 }
 
-static struct iosapic_rte_info * __init_refok iosapic_alloc_rte (void)
-{
-        int i;
-        struct iosapic_rte_info *rte;
-        int preallocated = 0;
-
-        if (!iosapic_kmalloc_ok && list_empty(&free_rte_list)) {
-                rte = alloc_bootmem(sizeof(struct iosapic_rte_info) *
-                                    NR_PREALLOCATE_RTE_ENTRIES);
-                for (i = 0; i < NR_PREALLOCATE_RTE_ENTRIES; i++, rte++)
-                        list_add(&rte->rte_list, &free_rte_list);
-        }
-
-        if (!list_empty(&free_rte_list)) {
-                rte = list_entry(free_rte_list.next, struct iosapic_rte_info,
-                                 rte_list);
-                list_del(&rte->rte_list);
-                preallocated++;
-        } else {
-                rte = kmalloc(sizeof(struct iosapic_rte_info), GFP_ATOMIC);
-                if (!rte)
-                        return NULL;
-        }
-
-        memset(rte, 0, sizeof(struct iosapic_rte_info));
-        if (preallocated)
-                rte->flags |= RTE_PREALLOCATED;
-
-        return rte;
-}
-
 static inline int irq_is_shared (int irq)
 {
         return (iosapic_intr_info[irq].count > 1);
@@ -615,7 +576,7 @@ register_intr (unsigned int gsi, int irq, unsigned char delivery,
 
         rte = find_rte(irq, gsi);
         if (!rte) {
-                rte = iosapic_alloc_rte();
+                rte = kzalloc(sizeof (*rte), GFP_ATOMIC);
                 if (!rte) {
                         printk(KERN_WARNING "%s: cannot allocate memory\n",
                                __func__);
@@ -658,6 +619,10 @@ register_intr (unsigned int gsi, int irq, unsigned char delivery,
                                idesc->chip->name, irq_type->name);
                 idesc->chip = irq_type;
         }
+        if (trigger == IOSAPIC_EDGE)
+                __set_irq_handler_unlocked(irq, handle_edge_irq);
+        else
+                __set_irq_handler_unlocked(irq, handle_level_irq);
         return 0;
 }
 
@@ -1161,10 +1126,3 @@ map_iosapic_to_node(unsigned int gsi_base, int node)
         return;
 }
 #endif
-
-static int __init iosapic_enable_kmalloc (void)
-{
-        iosapic_kmalloc_ok = 1;
-        return 0;
-}
-core_initcall (iosapic_enable_kmalloc);
diff --git a/arch/ia64/kernel/irq_ia64.c b/arch/ia64/kernel/irq_ia64.c
index f14c35f9b03a..9a26015c3e50 100644
--- a/arch/ia64/kernel/irq_ia64.c
+++ b/arch/ia64/kernel/irq_ia64.c
@@ -30,6 +30,7 @@
 #include <linux/bitops.h>
 #include <linux/irq.h>
 #include <linux/ratelimit.h>
+#include <linux/acpi.h>
 
 #include <asm/delay.h>
 #include <asm/intrinsics.h>
@@ -635,6 +636,7 @@ ia64_native_register_percpu_irq (ia64_vector vec, struct irqaction *action)
         desc->chip = &irq_type_ia64_lsapic;
         if (action)
                 setup_irq(irq, action);
+        set_irq_handler(irq, handle_percpu_irq);
 }
 
 void __init
@@ -650,6 +652,9 @@ ia64_native_register_ipi(void)
 void __init
 init_IRQ (void)
 {
+#ifdef CONFIG_ACPI
+        acpi_boot_init();
+#endif
         ia64_register_ipi();
         register_percpu_irq(IA64_SPURIOUS_INT_VECTOR, NULL);
 #ifdef CONFIG_SMP
diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c
index a0220dc5ff42..1753f6a30d55 100644
--- a/arch/ia64/kernel/mca.c
+++ b/arch/ia64/kernel/mca.c
@@ -2055,25 +2055,6 @@ ia64_mca_init(void)
 
         IA64_MCA_DEBUG("%s: registered OS INIT handler with SAL\n", __func__);
 
-        /*
-         *  Configure the CMCI/P vector and handler. Interrupts for CMC are
-         *  per-processor, so AP CMC interrupts are setup in smp_callin() (smpboot.c).
-         */
-        register_percpu_irq(IA64_CMC_VECTOR, &cmci_irqaction);
-        register_percpu_irq(IA64_CMCP_VECTOR, &cmcp_irqaction);
-        ia64_mca_cmc_vector_setup();       /* Setup vector on BSP */
-
-        /* Setup the MCA rendezvous interrupt vector */
-        register_percpu_irq(IA64_MCA_RENDEZ_VECTOR, &mca_rdzv_irqaction);
-
-        /* Setup the MCA wakeup interrupt vector */
-        register_percpu_irq(IA64_MCA_WAKEUP_VECTOR, &mca_wkup_irqaction);
-
-#ifdef CONFIG_ACPI
-        /* Setup the CPEI/P handler */
-        register_percpu_irq(IA64_CPEP_VECTOR, &mca_cpep_irqaction);
-#endif
-
         /* Initialize the areas set aside by the OS to buffer the
          * platform/processor error states for MCA/INIT/CMC
          * handling.
@@ -2103,6 +2084,25 @@ ia64_mca_late_init(void)
         if (!mca_init)
                 return 0;
 
+        /*
+         *  Configure the CMCI/P vector and handler. Interrupts for CMC are
+         *  per-processor, so AP CMC interrupts are setup in smp_callin() (smpboot.c).
+         */
+        register_percpu_irq(IA64_CMC_VECTOR, &cmci_irqaction);
+        register_percpu_irq(IA64_CMCP_VECTOR, &cmcp_irqaction);
+        ia64_mca_cmc_vector_setup();       /* Setup vector on BSP */
+
+        /* Setup the MCA rendezvous interrupt vector */
+        register_percpu_irq(IA64_MCA_RENDEZ_VECTOR, &mca_rdzv_irqaction);
+
+        /* Setup the MCA wakeup interrupt vector */
+        register_percpu_irq(IA64_MCA_WAKEUP_VECTOR, &mca_wkup_irqaction);
+
+#ifdef CONFIG_ACPI
+        /* Setup the CPEI/P handler */
+        register_percpu_irq(IA64_CPEP_VECTOR, &mca_cpep_irqaction);
+#endif
+
         register_hotcpu_notifier(&mca_cpu_notifier);
 
         /* Setup the CMCI/P vector and handler */
diff --git a/arch/ia64/kernel/palinfo.c b/arch/ia64/kernel/palinfo.c
index fdf6f9d013e5..77597e5ea60a 100644
--- a/arch/ia64/kernel/palinfo.c
+++ b/arch/ia64/kernel/palinfo.c
@@ -434,7 +434,7 @@ register_info(char *page)
         unsigned long phys_stacked;
         pal_hints_u_t hints;
         unsigned long iregs, dregs;
-        char *info_type[]={
+        static const char * const info_type[] = {
                 "Implemented AR(s)",
                 "AR(s) with read side-effects",
                 "Implemented CR(s)",
diff --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c
index cce050e85c73..6b1852f7f972 100644
--- a/arch/ia64/kernel/perfmon.c
+++ b/arch/ia64/kernel/perfmon.c
@@ -1573,7 +1573,7 @@ pfm_read(struct file *filp, char __user *buf, size_t size, loff_t *ppos)
                 return -EINVAL;
         }
 
-        ctx = (pfm_context_t *)filp->private_data;
+        ctx = filp->private_data;
         if (ctx == NULL) {
                 printk(KERN_ERR "perfmon: pfm_read: NULL ctx [%d]\n", task_pid_nr(current));
                 return -EINVAL;
@@ -1673,7 +1673,7 @@ pfm_poll(struct file *filp, poll_table * wait)
                 return 0;
         }
 
-        ctx = (pfm_context_t *)filp->private_data;
+        ctx = filp->private_data;
         if (ctx == NULL) {
                 printk(KERN_ERR "perfmon: pfm_poll: NULL ctx [%d]\n", task_pid_nr(current));
                 return 0;
@@ -1733,7 +1733,7 @@ pfm_fasync(int fd, struct file *filp, int on)
                 return -EBADF;
         }
 
-        ctx = (pfm_context_t *)filp->private_data;
+        ctx = filp->private_data;
         if (ctx == NULL) {
                 printk(KERN_ERR "perfmon: pfm_fasync NULL ctx [%d]\n", task_pid_nr(current));
                 return -EBADF;
@@ -1841,7 +1841,7 @@ pfm_flush(struct file *filp, fl_owner_t id)
                 return -EBADF;
         }
 
-        ctx = (pfm_context_t *)filp->private_data;
+        ctx = filp->private_data;
         if (ctx == NULL) {
                 printk(KERN_ERR "perfmon: pfm_flush: NULL ctx [%d]\n", task_pid_nr(current));
                 return -EBADF;
@@ -1984,7 +1984,7 @@ pfm_close(struct inode *inode, struct file *filp)
                 return -EBADF;
         }
         
-        ctx = (pfm_context_t *)filp->private_data;
+        ctx = filp->private_data;
         if (ctx == NULL) {
                 printk(KERN_ERR "perfmon: pfm_close: NULL ctx [%d]\n", task_pid_nr(current));
                 return -EBADF;
@@ -4907,7 +4907,7 @@ restart_args:
                 goto error_args;
         }
 
-        ctx = (pfm_context_t *)file->private_data;
+        ctx = file->private_data;
         if (unlikely(ctx == NULL)) {
                 DPRINT(("no context for fd %d\n", fd));
                 goto error_args;
diff --git a/arch/ia64/kernel/salinfo.c b/arch/ia64/kernel/salinfo.c
index aa8b5fa1a8de..45d7543b69cc 100644
--- a/arch/ia64/kernel/salinfo.c
+++ b/arch/ia64/kernel/salinfo.c
@@ -642,7 +642,7 @@ salinfo_init(void)
         for (i = 0; i < ARRAY_SIZE(salinfo_log_name); i++) {
                 data = salinfo_data + i;
                 data->type = i;
-                init_MUTEX(&data->mutex);
+                sema_init(&data->mutex, 1);
                 dir = proc_mkdir(salinfo_log_name[i], salinfo_dir);
                 if (!dir)
                         continue;
diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c
index 8fb958abf8d0..911cf9749700 100644
--- a/arch/ia64/kernel/setup.c
+++ b/arch/ia64/kernel/setup.c
@@ -594,10 +594,6 @@ setup_arch (char **cmdline_p)
         cpu_init();     /* initialize the bootstrap CPU */
         mmu_context_init();     /* initialize context_id bitmap */
 
-#ifdef CONFIG_ACPI
-        acpi_boot_init();
-#endif
-
         paravirt_banner();
         paravirt_arch_setup_console(cmdline_p);
 
diff --git a/arch/ia64/kernel/stacktrace.c b/arch/ia64/kernel/stacktrace.c
new file mode 100644
index 000000000000..5af2783a87f4
--- /dev/null
+++ b/arch/ia64/kernel/stacktrace.c
@@ -0,0 +1,39 @@
+/*
+ * arch/ia64/kernel/stacktrace.c
+ *
+ * Stack trace management functions
+ *
+ */
+#include <linux/sched.h>
+#include <linux/stacktrace.h>
+#include <linux/module.h>
+
+static void
+ia64_do_save_stack(struct unw_frame_info *info, void *arg)
+{
+        struct stack_trace *trace = arg;
+        unsigned long ip;
+        int skip = trace->skip;
+
+        trace->nr_entries = 0;
+        do {
+                unw_get_ip(info, &ip);
+                if (ip == 0)
+                        break;
+                if (skip == 0) {
+                        trace->entries[trace->nr_entries++] = ip;
+                        if (trace->nr_entries == trace->max_entries)
+                                break;
+                } else
+                        skip--;
+        } while (unw_unwind(info) >= 0);
+}
+
+/*
+ * Save stack-backtrace addresses into a stack_trace buffer.
+ */
+void save_stack_trace(struct stack_trace *trace)
+{
+        unw_init_running(ia64_do_save_stack, trace);
+}
+EXPORT_SYMBOL(save_stack_trace);