19 files changed, 745 insertions, 177 deletions
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index d5ee4fc8fe66..0b7f701d5cf7 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -423,6 +423,14 @@ config IA64_PALINFO
 config SGI_SN
        def_bool y if (IA64_SGI_SN2 || IA64_GENERIC)
+config IA64_ESI
+        bool "ESI (Extensible SAL Interface) support"
+        help
+          If you say Y here, support is built into the kernel to
+          make ESI calls.  ESI calls are used to support vendor-specific
+          firmware extensions, such as the ability to inject memory-errors
+          for test-purposes.  If you're unsure, say N.
 source "drivers/sn/Kconfig"
 source "drivers/firmware/Kconfig"
diff --git a/arch/ia64/kernel/Makefile b/arch/ia64/kernel/Makefile
index ad8215a3c586..31497496eb4b 100644
--- a/arch/ia64/kernel/Makefile
+++ b/arch/ia64/kernel/Makefile
@@ -32,6 +32,11 @@ obj-$(CONFIG_IA64_UNCACHED_ALLOCATOR)	+= uncached.o
 obj-$(CONFIG_AUDIT)             += audit.o
 mca_recovery-y                  += mca_drv.o mca_drv_asm.o
+obj-$(CONFIG_IA64_ESI)          += esi.o
+ifneq ($(CONFIG_IA64_ESI),)
+obj-y                           += esi_stub.o   # must be in kernel proper
+endif
 # The gate DSO image is built using a special linker script.
 targets += gate.so gate-syms.o
diff --git a/arch/ia64/kernel/entry.S b/arch/ia64/kernel/entry.S
index fef06571be99..12701cf32d99 100644
--- a/arch/ia64/kernel/entry.S
+++ b/arch/ia64/kernel/entry.S
@@ -1605,8 +1605,8 @@ sys_call_table:
        data8 sys_ni_syscall                    // 1295 reserved for ppoll
        data8 sys_unshare
        data8 sys_splice
-        data8 sys_ni_syscall                    // reserved for set_robust_list
+        data8 sys_set_robust_list
-        data8 sys_ni_syscall                    // reserved for get_robust_list
+        data8 sys_get_robust_list
        data8 sys_sync_file_range               // 1300
        data8 sys_tee
        data8 sys_vmsplice
diff --git a/arch/ia64/kernel/esi.c b/arch/ia64/kernel/esi.c
new file mode 100644
index 000000000000..ebf4e988e78c
--- /dev/null
+++ b/arch/ia64/kernel/esi.c
@@ -0,0 +1,205 @@
+/*
+ * Extensible SAL Interface (ESI) support routines.
+ *
+ * Copyright (C) 2006 Hewlett-Packard Co
+ *      Alex Williamson <alex.williamson@hp.com>
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <asm/esi.h>
+#include <asm/sal.h>
+MODULE_AUTHOR("Alex Williamson <alex.williamson@hp.com>");
+MODULE_DESCRIPTION("Extensible SAL Interface (ESI) support");
+MODULE_LICENSE("GPL");
+#define MODULE_NAME     "esi"
+#define ESI_TABLE_GUID                                  \
+    EFI_GUID(0x43EA58DC, 0xCF28, 0x4b06, 0xB3,          \
+             0x91, 0xB7, 0x50, 0x59, 0x34, 0x2B, 0xD4)
+enum esi_systab_entry_type {
+        ESI_DESC_ENTRY_POINT = 0
+};
+/*
+ * Entry type:  Size:
+ *      0       48
+ */
+#define ESI_DESC_SIZE(type)     "\060"[(unsigned) (type)]
+typedef struct ia64_esi_desc_entry_point {
+        u8 type;
+        u8 reserved1[15];
+        u64 esi_proc;
+        u64 gp;
+        efi_guid_t guid;
+} ia64_esi_desc_entry_point_t;
+struct pdesc {
+        void *addr;
+        void *gp;
+};
+static struct ia64_sal_systab *esi_systab;
+static int __init esi_init (void)
+{
+        efi_config_table_t *config_tables;
+        struct ia64_sal_systab *systab;
+        unsigned long esi = 0;
+        char *p;
+        int i;
+        config_tables = __va(efi.systab->tables);
+        for (i = 0; i < (int) efi.systab->nr_tables; ++i) {
+                if (efi_guidcmp(config_tables[i].guid, ESI_TABLE_GUID) == 0) {
+                        esi = config_tables[i].table;
+                        break;
+                }
+        }
+        if (!esi)
+                return -ENODEV;;
+        systab = __va(esi);
+        if (strncmp(systab->signature, "ESIT", 4) != 0) {
+                printk(KERN_ERR "bad signature in ESI system table!");
+                return -ENODEV;
+        }
+        p = (char *) (systab + 1);
+        for (i = 0; i < systab->entry_count; i++) {
+                /*
+                 * The first byte of each entry type contains the type
+                 * descriptor.
+                 */
+                switch (*p) {
+                      case ESI_DESC_ENTRY_POINT:
+                        break;
+                      default:
+                        printk(KERN_WARNING "Unkown table type %d found in "
+                               "ESI table, ignoring rest of table\n", *p);
+                        return -ENODEV;
+                }
+                p += ESI_DESC_SIZE(*p);
+        }
+        esi_systab = systab;
+        return 0;
+}
+int ia64_esi_call (efi_guid_t guid, struct ia64_sal_retval *isrvp,
+                   enum esi_proc_type proc_type, u64 func,
+                   u64 arg1, u64 arg2, u64 arg3, u64 arg4, u64 arg5, u64 arg6,
+                   u64 arg7)
+{
+        struct ia64_fpreg fr[6];
+        unsigned long flags = 0;
+        int i;
+        char *p;
+        if (!esi_systab)
+                return -1;
+        p = (char *) (esi_systab + 1);
+        for (i = 0; i < esi_systab->entry_count; i++) {
+                if (*p == ESI_DESC_ENTRY_POINT) {
+                        ia64_esi_desc_entry_point_t *esi = (void *)p;
+                        if (!efi_guidcmp(guid, esi->guid)) {
+                                ia64_sal_handler esi_proc;
+                                struct pdesc pdesc;
+                                pdesc.addr = __va(esi->esi_proc);
+                                pdesc.gp = __va(esi->gp);
+                                esi_proc = (ia64_sal_handler) &pdesc;
+                                ia64_save_scratch_fpregs(fr);
+                                if (proc_type == ESI_PROC_SERIALIZED)
+                                        spin_lock_irqsave(&sal_lock, flags);
+                                else if (proc_type == ESI_PROC_MP_SAFE)
+                                        local_irq_save(flags);
+                                else
+                                        preempt_disable();
+                                *isrvp = (*esi_proc)(func, arg1, arg2, arg3,
+                                                     arg4, arg5, arg6, arg7);
+                                if (proc_type == ESI_PROC_SERIALIZED)
+                                        spin_unlock_irqrestore(&sal_lock,
+                                                               flags);
+                                else if (proc_type == ESI_PROC_MP_SAFE)
+                                        local_irq_restore(flags);
+                                else
+                                        preempt_enable();
+                                ia64_load_scratch_fpregs(fr);
+                                return 0;
+                        }
+                }
+                p += ESI_DESC_SIZE(*p);
+        }
+        return -1;
+}
+EXPORT_SYMBOL_GPL(ia64_esi_call);
+int ia64_esi_call_phys (efi_guid_t guid, struct ia64_sal_retval *isrvp,
+                        u64 func, u64 arg1, u64 arg2, u64 arg3, u64 arg4,
+                        u64 arg5, u64 arg6, u64 arg7)
+{
+        struct ia64_fpreg fr[6];
+        unsigned long flags;
+        u64 esi_params[8];
+        char *p;
+        int i;
+        if (!esi_systab)
+                return -1;
+        p = (char *) (esi_systab + 1);
+        for (i = 0; i < esi_systab->entry_count; i++) {
+                if (*p == ESI_DESC_ENTRY_POINT) {
+                        ia64_esi_desc_entry_point_t *esi = (void *)p;
+                        if (!efi_guidcmp(guid, esi->guid)) {
+                                ia64_sal_handler esi_proc;
+                                struct pdesc pdesc;
+                                pdesc.addr = (void *)esi->esi_proc;
+                                pdesc.gp = (void *)esi->gp;
+                                esi_proc = (ia64_sal_handler) &pdesc;
+                                esi_params[0] = func;
+                                esi_params[1] = arg1;
+                                esi_params[2] = arg2;
+                                esi_params[3] = arg3;
+                                esi_params[4] = arg4;
+                                esi_params[5] = arg5;
+                                esi_params[6] = arg6;
+                                esi_params[7] = arg7;
+                                ia64_save_scratch_fpregs(fr);
+                                spin_lock_irqsave(&sal_lock, flags);
+                                *isrvp = esi_call_phys(esi_proc, esi_params);
+                                spin_unlock_irqrestore(&sal_lock, flags);
+                                ia64_load_scratch_fpregs(fr);
+                                return 0;
+                        }
+                }
+                p += ESI_DESC_SIZE(*p);
+        }
+        return -1;
+}
+EXPORT_SYMBOL_GPL(ia64_esi_call_phys);
+static void __exit esi_exit (void)
+{
+}
+module_init(esi_init);
+module_exit(esi_exit);  /* makes module removable... */
diff --git a/arch/ia64/kernel/esi_stub.S b/arch/ia64/kernel/esi_stub.S
new file mode 100644
index 000000000000..6b3d6c1f99b6
--- /dev/null
+++ b/arch/ia64/kernel/esi_stub.S
@@ -0,0 +1,96 @@
+/*
+ * ESI call stub.
+ *
+ * Copyright (C) 2005 Hewlett-Packard Co
+ *      Alex Williamson <alex.williamson@hp.com>
+ *
+ * Based on EFI call stub by David Mosberger.  The stub is virtually
+ * identical to the one for EFI phys-mode calls, except that ESI
+ * calls may have up to 8 arguments, so they get passed to this routine
+ * through memory.
+ *
+ * This stub allows us to make ESI calls in physical mode with interrupts
+ * turned off.  ESI calls may not support calling from virtual mode.
+ *
+ * Google for "Extensible SAL specification" for a document describing the
+ * ESI standard.
+ */
+/*
+ * PSR settings as per SAL spec (Chapter 8 in the "IA-64 System
+ * Abstraction Layer Specification", revision 2.6e).  Note that
+ * psr.dfl and psr.dfh MUST be cleared, despite what this manual says.
+ * Otherwise, SAL dies whenever it's trying to do an IA-32 BIOS call
+ * (the br.ia instruction fails unless psr.dfl and psr.dfh are
+ * cleared).  Fortunately, SAL promises not to touch the floating
+ * point regs, so at least we don't have to save f2-f127.
+ */
+#define PSR_BITS_TO_CLEAR                                               \
+        (IA64_PSR_I | IA64_PSR_IT | IA64_PSR_DT | IA64_PSR_RT |         \
+         IA64_PSR_DD | IA64_PSR_SS | IA64_PSR_RI | IA64_PSR_ED |        \
+         IA64_PSR_DFL | IA64_PSR_DFH)
+#define PSR_BITS_TO_SET                                                 \
+        (IA64_PSR_BN)
+#include <asm/processor.h>
+#include <asm/asmmacro.h>
+/*
+ * Inputs:
+ *      in0 = address of function descriptor of ESI routine to call
+ *      in1 = address of array of ESI parameters
+ *
+ * Outputs:
+ *      r8 = result returned by called function
+ */
+GLOBAL_ENTRY(esi_call_phys)
+        .prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(2)
+        alloc loc1=ar.pfs,2,7,8,0
+        ld8 r2=[in0],8                  // load ESI function's entry point
+        mov loc0=rp
+        .body
+        ;;
+        ld8 out0=[in1],8                // ESI params loaded from array
+        ;;                              // passing all as inputs doesn't work
+        ld8 out1=[in1],8
+        ;;
+        ld8 out2=[in1],8
+        ;;
+        ld8 out3=[in1],8
+        ;;
+        ld8 out4=[in1],8
+        ;;
+        ld8 out5=[in1],8
+        ;;
+        ld8 out6=[in1],8
+        ;;
+        ld8 out7=[in1]
+        mov loc2=gp                     // save global pointer
+        mov loc4=ar.rsc                 // save RSE configuration
+        mov ar.rsc=0                    // put RSE in enforced lazy, LE mode
+        ;;
+        ld8 gp=[in0]                    // load ESI function's global pointer
+        movl r16=PSR_BITS_TO_CLEAR
+        mov loc3=psr                    // save processor status word
+        movl r17=PSR_BITS_TO_SET
+        ;;
+        or loc3=loc3,r17
+        mov b6=r2
+        ;;
+        andcm r16=loc3,r16      // get psr with IT, DT, and RT bits cleared
+        br.call.sptk.many rp=ia64_switch_mode_phys
+.ret0:  mov loc5=r19                    // old ar.bsp
+        mov loc6=r20                    // old sp
+        br.call.sptk.many rp=b6         // call the ESI function
+.ret1:  mov ar.rsc=0                    // put RSE in enforced lazy, LE mode
+        mov r16=loc3                    // save virtual mode psr
+        mov r19=loc5                    // save virtual mode bspstore
+        mov r20=loc6                    // save virtual mode sp
+        br.call.sptk.many rp=ia64_switch_mode_virt // return to virtual mode
+.ret2:  mov ar.rsc=loc4                 // restore RSE configuration
+        mov ar.pfs=loc1
+        mov rp=loc0
+        mov gp=loc2
+        br.ret.sptk.many rp
+END(esi_call_phys)
diff --git a/arch/ia64/kernel/ia64_ksyms.c b/arch/ia64/kernel/ia64_ksyms.c
index 3ead20fb6f4b..879c1817bd1c 100644
--- a/arch/ia64/kernel/ia64_ksyms.c
+++ b/arch/ia64/kernel/ia64_ksyms.c
@@ -105,5 +105,9 @@ EXPORT_SYMBOL(ia64_spinlock_contention);
 # endif
 #endif
+#if defined(CONFIG_IA64_ESI) || defined(CONFIG_IA64_ESI_MODULE)
+extern void esi_call_phys (void);
+EXPORT_SYMBOL_GPL(esi_call_phys);
+#endif
 extern char ia64_ivt[];
 EXPORT_SYMBOL(ia64_ivt);
diff --git a/arch/ia64/kernel/kprobes.c b/arch/ia64/kernel/kprobes.c
index 781960f80b6f..169ec3a7156c 100644
--- a/arch/ia64/kernel/kprobes.c
+++ b/arch/ia64/kernel/kprobes.c
@@ -136,10 +136,8 @@ static void __kprobes update_kprobe_inst_flag(uint template, uint  slot,
 static int __kprobes unsupported_inst(uint template, uint  slot,
                                      uint major_opcode,
                                      unsigned long kprobe_inst,
-                                      struct kprobe *p)
+                                      unsigned long addr)
 {
-        unsigned long addr = (unsigned long)p->addr;
        if (bundle_encoding[template][slot] == I) {
                switch (major_opcode) {
                        case 0x0: //I_UNIT_MISC_OPCODE:
@@ -217,7 +215,7 @@ static void __kprobes prepare_break_inst(uint template, uint  slot,
                                         struct kprobe *p)
 {
        unsigned long break_inst = BREAK_INST;
-        bundle_t *bundle = &p->ainsn.insn.bundle;
+        bundle_t *bundle = &p->opcode.bundle;
        /*
         * Copy the original kprobe_inst qualifying predicate(qp)
@@ -423,11 +421,9 @@ int __kprobes arch_prepare_kprobe(struct kprobe *p)
        unsigned long *kprobe_addr = (unsigned long *)(addr & ~0xFULL);
        unsigned long kprobe_inst=0;
        unsigned int slot = addr & 0xf, template, major_opcode = 0;
-        bundle_t *bundle = &p->ainsn.insn.bundle;
+        bundle_t *bundle;
-        memcpy(&p->opcode.bundle, kprobe_addr, sizeof(bundle_t));
-        memcpy(&p->ainsn.insn.bundle, kprobe_addr, sizeof(bundle_t));
+        bundle = &((kprobe_opcode_t *)kprobe_addr)->bundle;
        template = bundle->quad0.template;
        if(valid_kprobe_addr(template, slot, addr))
@@ -440,20 +436,19 @@ int __kprobes arch_prepare_kprobe(struct kprobe *p)
        /* Get kprobe_inst and major_opcode from the bundle */
        get_kprobe_inst(bundle, slot, &kprobe_inst, &major_opcode);
-        if (unsupported_inst(template, slot, major_opcode, kprobe_inst, p))
+        if (unsupported_inst(template, slot, major_opcode, kprobe_inst, addr))
                        return -EINVAL;
-        prepare_break_inst(template, slot, major_opcode, kprobe_inst, p);
-        return 0;
+        p->ainsn.insn = get_insn_slot();
-}
+        if (!p->ainsn.insn)
+                return -ENOMEM;
+        memcpy(&p->opcode, kprobe_addr, sizeof(kprobe_opcode_t));
+        memcpy(p->ainsn.insn, kprobe_addr, sizeof(kprobe_opcode_t));
-void __kprobes flush_insn_slot(struct kprobe *p)
+        prepare_break_inst(template, slot, major_opcode, kprobe_inst, p);
-{
-        unsigned long arm_addr;
-        arm_addr = ((unsigned long)&p->opcode.bundle) & ~0xFULL;
+        return 0;
-        flush_icache_range(arm_addr, arm_addr + sizeof(bundle_t));
 }
 void __kprobes arch_arm_kprobe(struct kprobe *p)
@@ -461,9 +456,10 @@ void __kprobes arch_arm_kprobe(struct kprobe *p)
        unsigned long addr = (unsigned long)p->addr;
        unsigned long arm_addr = addr & ~0xFULL;
-        flush_insn_slot(p);
+        flush_icache_range((unsigned long)p->ainsn.insn,
-        memcpy((char *)arm_addr, &p->ainsn.insn.bundle, sizeof(bundle_t));
+                        (unsigned long)p->ainsn.insn + sizeof(kprobe_opcode_t));
-        flush_icache_range(arm_addr, arm_addr + sizeof(bundle_t));
+        memcpy((char *)arm_addr, &p->opcode, sizeof(kprobe_opcode_t));
+        flush_icache_range(arm_addr, arm_addr + sizeof(kprobe_opcode_t));
 }
 void __kprobes arch_disarm_kprobe(struct kprobe *p)
@@ -471,11 +467,18 @@ void __kprobes arch_disarm_kprobe(struct kprobe *p)
        unsigned long addr = (unsigned long)p->addr;
        unsigned long arm_addr = addr & ~0xFULL;
-        /* p->opcode contains the original unaltered bundle */
+        /* p->ainsn.insn contains the original unaltered kprobe_opcode_t */
-        memcpy((char *) arm_addr, (char *) &p->opcode.bundle, sizeof(bundle_t));
+        memcpy((char *) arm_addr, (char *) p->ainsn.insn,
-        flush_icache_range(arm_addr, arm_addr + sizeof(bundle_t));
+                                         sizeof(kprobe_opcode_t));
+        flush_icache_range(arm_addr, arm_addr + sizeof(kprobe_opcode_t));
 }
+void __kprobes arch_remove_kprobe(struct kprobe *p)
+{
+        mutex_lock(&kprobe_mutex);
+        free_insn_slot(p->ainsn.insn);
+        mutex_unlock(&kprobe_mutex);
+}
 /*
 * We are resuming execution after a single step fault, so the pt_regs
 * structure reflects the register state after we executed the instruction
@@ -486,12 +489,12 @@ void __kprobes arch_disarm_kprobe(struct kprobe *p)
 */
 static void __kprobes resume_execution(struct kprobe *p, struct pt_regs *regs)
 {
-        unsigned long bundle_addr = ((unsigned long) (&p->opcode.bundle)) & ~0xFULL;
+        unsigned long bundle_addr = (unsigned long) (&p->ainsn.insn->bundle);
        unsigned long resume_addr = (unsigned long)p->addr & ~0xFULL;
        unsigned long template;
        int slot = ((unsigned long)p->addr & 0xf);
-        template = p->opcode.bundle.quad0.template;
+        template = p->ainsn.insn->bundle.quad0.template;
        if (slot == 1 && bundle_encoding[template][1] == L)
                slot = 2;
@@ -553,7 +556,7 @@ turn_ss_off:
 static void __kprobes prepare_ss(struct kprobe *p, struct pt_regs *regs)
 {
-        unsigned long bundle_addr = (unsigned long) &p->opcode.bundle;
+        unsigned long bundle_addr = (unsigned long) &p->ainsn.insn->bundle;
        unsigned long slot = (unsigned long)p->addr & 0xf;
        /* single step inline if break instruction */
@@ -768,6 +771,12 @@ static int __kprobes kprobes_fault_handler(struct pt_regs *regs, int trapnr)
                 */
                if (cur->fault_handler && cur->fault_handler(cur, regs, trapnr))
                        return 1;
+                /*
+                 * In case the user-specified fault handler returned
+                 * zero, try to fix up.
+                 */
+                if (ia64_done_with_exception(regs))
+                        return 1;
                /*
                 * Let ia64_do_page_fault() fix it.
diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c
index 2fbe4536fe18..bfbd8986153b 100644
--- a/arch/ia64/kernel/mca.c
+++ b/arch/ia64/kernel/mca.c
@@ -54,6 +54,9 @@
 *
 * 2005-10-07 Keith Owens <kaos@sgi.com>
 *            Add notify_die() hooks.
+ *
+ * 2006-09-15 Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
+ *            Add printing support for MCA/INIT.
 */
 #include <linux/types.h>
 #include <linux/init.h>
@@ -136,11 +139,175 @@ extern void salinfo_log_wakeup(int type, u8 *buffer, u64 size, int irqsafe);
 static int mca_init __initdata;
+/*
+ * limited & delayed printing support for MCA/INIT handler
+ */
+#define mprintk(fmt...) ia64_mca_printk(fmt)
+#define MLOGBUF_SIZE (512+256*NR_CPUS)
+#define MLOGBUF_MSGMAX 256
+static char mlogbuf[MLOGBUF_SIZE];
+static DEFINE_SPINLOCK(mlogbuf_wlock);  /* mca context only */
+static DEFINE_SPINLOCK(mlogbuf_rlock);  /* normal context only */
+static unsigned long mlogbuf_start;
+static unsigned long mlogbuf_end;
+static unsigned int mlogbuf_finished = 0;
+static unsigned long mlogbuf_timestamp = 0;
+static int loglevel_save = -1;
+#define BREAK_LOGLEVEL(__console_loglevel)              \
+        oops_in_progress = 1;                           \
+        if (loglevel_save < 0)                          \
+                loglevel_save = __console_loglevel;     \
+        __console_loglevel = 15;
+#define RESTORE_LOGLEVEL(__console_loglevel)            \
+        if (loglevel_save >= 0) {                       \
+                __console_loglevel = loglevel_save;     \
+                loglevel_save = -1;                     \
+        }                                               \
+        mlogbuf_finished = 0;                           \
+        oops_in_progress = 0;
+/*
+ * Push messages into buffer, print them later if not urgent.
+ */
+void ia64_mca_printk(const char *fmt, ...)
+{
+        va_list args;
+        int printed_len;
+        char temp_buf[MLOGBUF_MSGMAX];
+        char *p;
+        va_start(args, fmt);
+        printed_len = vscnprintf(temp_buf, sizeof(temp_buf), fmt, args);
+        va_end(args);
+        /* Copy the output into mlogbuf */
+        if (oops_in_progress) {
+                /* mlogbuf was abandoned, use printk directly instead. */
+                printk(temp_buf);
+        } else {
+                spin_lock(&mlogbuf_wlock);
+                for (p = temp_buf; *p; p++) {
+                        unsigned long next = (mlogbuf_end + 1) % MLOGBUF_SIZE;
+                        if (next != mlogbuf_start) {
+                                mlogbuf[mlogbuf_end] = *p;
+                                mlogbuf_end = next;
+                        } else {
+                                /* buffer full */
+                                break;
+                        }
+                }
+                mlogbuf[mlogbuf_end] = '\0';
+                spin_unlock(&mlogbuf_wlock);
+        }
+}
+EXPORT_SYMBOL(ia64_mca_printk);
+/*
+ * Print buffered messages.
+ *  NOTE: call this after returning normal context. (ex. from salinfod)
+ */
+void ia64_mlogbuf_dump(void)
+{
+        char temp_buf[MLOGBUF_MSGMAX];
+        char *p;
+        unsigned long index;
+        unsigned long flags;
+        unsigned int printed_len;
+        /* Get output from mlogbuf */
+        while (mlogbuf_start != mlogbuf_end) {
+                temp_buf[0] = '\0';
+                p = temp_buf;
+                printed_len = 0;
+                spin_lock_irqsave(&mlogbuf_rlock, flags);
+                index = mlogbuf_start;
+                while (index != mlogbuf_end) {
+                        *p = mlogbuf[index];
+                        index = (index + 1) % MLOGBUF_SIZE;
+                        if (!*p)
+                                break;
+                        p++;
+                        if (++printed_len >= MLOGBUF_MSGMAX - 1)
+                                break;
+                }
+                *p = '\0';
+                if (temp_buf[0])
+                        printk(temp_buf);
+                mlogbuf_start = index;
+                mlogbuf_timestamp = 0;
+                spin_unlock_irqrestore(&mlogbuf_rlock, flags);
+        }
+}
+EXPORT_SYMBOL(ia64_mlogbuf_dump);
+/*
+ * Call this if system is going to down or if immediate flushing messages to
+ * console is required. (ex. recovery was failed, crash dump is going to be
+ * invoked, long-wait rendezvous etc.)
+ *  NOTE: this should be called from monarch.
+ */
+static void ia64_mlogbuf_finish(int wait)
+{
+        BREAK_LOGLEVEL(console_loglevel);
+        spin_lock_init(&mlogbuf_rlock);
+        ia64_mlogbuf_dump();
+        printk(KERN_EMERG "mlogbuf_finish: printing switched to urgent mode, "
+                "MCA/INIT might be dodgy or fail.\n");
+        if (!wait)
+                return;
+        /* wait for console */
+        printk("Delaying for 5 seconds...\n");
+        udelay(5*1000000);
+        mlogbuf_finished = 1;
+}
+EXPORT_SYMBOL(ia64_mlogbuf_finish);
+/*
+ * Print buffered messages from INIT context.
+ */
+static void ia64_mlogbuf_dump_from_init(void)
+{
+        if (mlogbuf_finished)
+                return;
+        if (mlogbuf_timestamp && (mlogbuf_timestamp + 30*HZ > jiffies)) {
+                printk(KERN_ERR "INIT: mlogbuf_dump is interrupted by INIT "
+                        " and the system seems to be messed up.\n");
+                ia64_mlogbuf_finish(0);
+                return;
+        }
+        if (!spin_trylock(&mlogbuf_rlock)) {
+                printk(KERN_ERR "INIT: mlogbuf_dump is interrupted by INIT. "
+                        "Generated messages other than stack dump will be "
+                        "buffered to mlogbuf and will be printed later.\n");
+                printk(KERN_ERR "INIT: If messages would not printed after "
+                        "this INIT, wait 30sec and assert INIT again.\n");
+                if (!mlogbuf_timestamp)
+                        mlogbuf_timestamp = jiffies;
+                return;
+        }
+        spin_unlock(&mlogbuf_rlock);
+        ia64_mlogbuf_dump();
+}
 static void inline
 ia64_mca_spin(const char *func)
 {
-        printk(KERN_EMERG "%s: spinning here, not returning to SAL\n", func);
+        if (monarch_cpu == smp_processor_id())
+                ia64_mlogbuf_finish(0);
+        mprintk(KERN_EMERG "%s: spinning here, not returning to SAL\n", func);
        while (1)
                cpu_relax();
 }
@@ -344,9 +511,6 @@ ia64_mca_cpe_int_handler (int cpe_irq, void *arg, struct pt_regs *ptregs)
        /* SAL spec states this should run w/ interrupts enabled */
        local_irq_enable();
-        /* Get the CPE error record and log it */
-        ia64_mca_log_sal_error_record(SAL_INFO_TYPE_CPE);
        spin_lock(&cpe_history_lock);
        if (!cpe_poll_enabled && cpe_vector >= 0) {
@@ -375,7 +539,7 @@ ia64_mca_cpe_int_handler (int cpe_irq, void *arg, struct pt_regs *ptregs)
                        mod_timer(&cpe_poll_timer, jiffies + MIN_CPE_POLL_INTERVAL);
                        /* lock already released, get out now */
-                        return IRQ_HANDLED;
+                        goto out;
                } else {
                        cpe_history[index++] = now;
                        if (index == CPE_HISTORY_LENGTH)
@@ -383,6 +547,10 @@ ia64_mca_cpe_int_handler (int cpe_irq, void *arg, struct pt_regs *ptregs)
                }
        }
        spin_unlock(&cpe_history_lock);
+out:
+        /* Get the CPE error record and log it */
+        ia64_mca_log_sal_error_record(SAL_INFO_TYPE_CPE);
        return IRQ_HANDLED;
 }
@@ -988,18 +1156,22 @@ ia64_wait_for_slaves(int monarch, const char *type)
        }
        if (!missing)
                goto all_in;
-        printk(KERN_INFO "OS %s slave did not rendezvous on cpu", type);
+        /*
+         * Maybe slave(s) dead. Print buffered messages immediately.
+         */
+        ia64_mlogbuf_finish(0);
+        mprintk(KERN_INFO "OS %s slave did not rendezvous on cpu", type);
        for_each_online_cpu(c) {
                if (c == monarch)
                        continue;
                if (ia64_mc_info.imi_rendez_checkin[c] == IA64_MCA_RENDEZ_CHECKIN_NOTDONE)
-                        printk(" %d", c);
+                        mprintk(" %d", c);
        }
-        printk("\n");
+        mprintk("\n");
        return;
 all_in:
-        printk(KERN_INFO "All OS %s slaves have reached rendezvous\n", type);
+        mprintk(KERN_INFO "All OS %s slaves have reached rendezvous\n", type);
        return;
 }
@@ -1027,10 +1199,8 @@ ia64_mca_handler(struct pt_regs *regs, struct switch_stack *sw,
        struct ia64_mca_notify_die nd =
                { .sos = sos, .monarch_cpu = &monarch_cpu };
-        oops_in_progress = 1;   /* FIXME: make printk NMI/MCA/INIT safe */
+        mprintk(KERN_INFO "Entered OS MCA handler. PSP=%lx cpu=%d "
-        console_loglevel = 15;  /* make sure printks make it to console */
+                "monarch=%ld\n", sos->proc_state_param, cpu, sos->monarch);
-        printk(KERN_INFO "Entered OS MCA handler. PSP=%lx cpu=%d monarch=%ld\n",
-                sos->proc_state_param, cpu, sos->monarch);
        previous_current = ia64_mca_modify_original_stack(regs, sw, sos, "MCA");
        monarch_cpu = cpu;
@@ -1066,6 +1236,9 @@ ia64_mca_handler(struct pt_regs *regs, struct switch_stack *sw,
                rh->severity = sal_log_severity_corrected;
                ia64_sal_clear_state_info(SAL_INFO_TYPE_MCA);
                sos->os_status = IA64_MCA_CORRECTED;
+        } else {
+                /* Dump buffered message to console */
+                ia64_mlogbuf_finish(1);
        }
        if (notify_die(DIE_MCA_MONARCH_LEAVE, "MCA", regs, (long)&nd, 0, recover)
                        == NOTIFY_STOP)
@@ -1106,9 +1279,6 @@ ia64_mca_cmc_int_handler(int cmc_irq, void *arg, struct pt_regs *ptregs)
        /* SAL spec states this should run w/ interrupts enabled */
        local_irq_enable();
-        /* Get the CMC error record and log it */
-        ia64_mca_log_sal_error_record(SAL_INFO_TYPE_CMC);
        spin_lock(&cmc_history_lock);
        if (!cmc_polling_enabled) {
                int i, count = 1; /* we know 1 happened now */
@@ -1141,7 +1311,7 @@ ia64_mca_cmc_int_handler(int cmc_irq, void *arg, struct pt_regs *ptregs)
                        mod_timer(&cmc_poll_timer, jiffies + CMC_POLL_INTERVAL);
                        /* lock already released, get out now */
-                        return IRQ_HANDLED;
+                        goto out;
                } else {
                        cmc_history[index++] = now;
                        if (index == CMC_HISTORY_LENGTH)
@@ -1149,6 +1319,10 @@ ia64_mca_cmc_int_handler(int cmc_irq, void *arg, struct pt_regs *ptregs)
                }
        }
        spin_unlock(&cmc_history_lock);
+out:
+        /* Get the CMC error record and log it */
+        ia64_mca_log_sal_error_record(SAL_INFO_TYPE_CMC);
        return IRQ_HANDLED;
 }
@@ -1305,6 +1479,15 @@ default_monarch_init_process(struct notifier_block *self, unsigned long val, voi
        struct task_struct *g, *t;
        if (val != DIE_INIT_MONARCH_PROCESS)
                return NOTIFY_DONE;
+        /*
+         * FIXME: mlogbuf will brim over with INIT stack dumps.
+         * To enable show_stack from INIT, we use oops_in_progress which should
+         * be used in real oops. This would cause something wrong after INIT.
+         */
+        BREAK_LOGLEVEL(console_loglevel);
+        ia64_mlogbuf_dump_from_init();
        printk(KERN_ERR "Processes interrupted by INIT -");
        for_each_online_cpu(c) {
                struct ia64_sal_os_state *s;
@@ -1326,6 +1509,8 @@ default_monarch_init_process(struct notifier_block *self, unsigned long val, voi
                } while_each_thread (g, t);
                read_unlock(&tasklist_lock);
        }
+        /* FIXME: This will not restore zapped printk locks. */
+        RESTORE_LOGLEVEL(console_loglevel);
        return NOTIFY_DONE;
 }
@@ -1357,12 +1542,9 @@ ia64_init_handler(struct pt_regs *regs, struct switch_stack *sw,
        struct ia64_mca_notify_die nd =
                { .sos = sos, .monarch_cpu = &monarch_cpu };
-        oops_in_progress = 1;   /* FIXME: make printk NMI/MCA/INIT safe */
-        console_loglevel = 15;  /* make sure printks make it to console */
        (void) notify_die(DIE_INIT_ENTER, "INIT", regs, (long)&nd, 0, 0);
-        printk(KERN_INFO "Entered OS INIT handler. PSP=%lx cpu=%d monarch=%ld\n",
+        mprintk(KERN_INFO "Entered OS INIT handler. PSP=%lx cpu=%d monarch=%ld\n",
                sos->proc_state_param, cpu, sos->monarch);
        salinfo_log_wakeup(SAL_INFO_TYPE_INIT, NULL, 0, 0);
@@ -1375,7 +1557,7 @@ ia64_init_handler(struct pt_regs *regs, struct switch_stack *sw,
         * fix their proms and get their customers updated.
         */
        if (!sos->monarch && atomic_add_return(1, &slaves) == num_online_cpus()) {
-                printk(KERN_WARNING "%s: Promoting cpu %d to monarch.\n",
+                mprintk(KERN_WARNING "%s: Promoting cpu %d to monarch.\n",
                       __FUNCTION__, cpu);
                atomic_dec(&slaves);
                sos->monarch = 1;
@@ -1387,7 +1569,7 @@ ia64_init_handler(struct pt_regs *regs, struct switch_stack *sw,
         * fix their proms and get their customers updated.
         */
        if (sos->monarch && atomic_add_return(1, &monarchs) > 1) {
-                printk(KERN_WARNING "%s: Demoting cpu %d to slave.\n",
+                mprintk(KERN_WARNING "%s: Demoting cpu %d to slave.\n",
                               __FUNCTION__, cpu);
                atomic_dec(&monarchs);
                sos->monarch = 0;
@@ -1408,7 +1590,7 @@ ia64_init_handler(struct pt_regs *regs, struct switch_stack *sw,
                if (notify_die(DIE_INIT_SLAVE_LEAVE, "INIT", regs, (long)&nd, 0, 0)
                                == NOTIFY_STOP)
                        ia64_mca_spin(__FUNCTION__);
-                printk("Slave on cpu %d returning to normal service.\n", cpu);
+                mprintk("Slave on cpu %d returning to normal service.\n", cpu);
                set_curr_task(cpu, previous_current);
                ia64_mc_info.imi_rendez_checkin[cpu] = IA64_MCA_RENDEZ_CHECKIN_NOTDONE;
                atomic_dec(&slaves);
@@ -1426,7 +1608,7 @@ ia64_init_handler(struct pt_regs *regs, struct switch_stack *sw,
         * same serial line, the user will need some time to switch out of the BMC before
         * the dump begins.
         */
-        printk("Delaying for 5 seconds...\n");
+        mprintk("Delaying for 5 seconds...\n");
        udelay(5*1000000);
        ia64_wait_for_slaves(cpu, "INIT");
        /* If nobody intercepts DIE_INIT_MONARCH_PROCESS then we drop through
@@ -1439,7 +1621,7 @@ ia64_init_handler(struct pt_regs *regs, struct switch_stack *sw,
        if (notify_die(DIE_INIT_MONARCH_LEAVE, "INIT", regs, (long)&nd, 0, 0)
                        == NOTIFY_STOP)
                ia64_mca_spin(__FUNCTION__);
-        printk("\nINIT dump complete.  Monarch on cpu %d returning to normal service.\n", cpu);
+        mprintk("\nINIT dump complete.  Monarch on cpu %d returning to normal service.\n", cpu);
        atomic_dec(&monarchs);
        set_curr_task(cpu, previous_current);
        monarch_cpu = -1;
diff --git a/arch/ia64/kernel/mca_asm.S b/arch/ia64/kernel/mca_asm.S
index 96047491d1b9..c6b607c00dee 100644
--- a/arch/ia64/kernel/mca_asm.S
+++ b/arch/ia64/kernel/mca_asm.S
@@ -1025,18 +1025,13 @@ ia64_old_stack:
 ia64_set_kernel_registers:
        add temp3=MCA_SP_OFFSET, r3
-        add temp4=MCA_SOS_OFFSET+SOS(OS_GP), r3
        mov b0=r2               // save return address
        GET_IA64_MCA_DATA(temp1)
        ;;
-        add temp4=temp4, temp1  // &struct ia64_sal_os_state.os_gp
        add r12=temp1, temp3    // kernel stack pointer on MCA/INIT stack
        add r13=temp1, r3       // set current to start of MCA/INIT stack
        add r20=temp1, r3       // physical start of MCA/INIT stack
        ;;
-        ld8 r1=[temp4]          // OS GP from SAL OS state
-        ;;
-        DATA_PA_TO_VA(r1,temp1)
        DATA_PA_TO_VA(r12,temp2)
        DATA_PA_TO_VA(r13,temp3)
        ;;
@@ -1067,6 +1062,10 @@ ia64_set_kernel_registers:
        mov cr.itir=r18
        mov cr.ifa=r13
        mov r20=IA64_TR_CURRENT_STACK
+        movl r17=FPSR_DEFAULT
+        ;;
+        mov.m ar.fpsr=r17                       // set ar.fpsr to kernel default value
        ;;
        itr.d dtr[r20]=r21
        ;;
diff --git a/arch/ia64/kernel/mca_drv.c b/arch/ia64/kernel/mca_drv.c
index 8db6e0cedadc..a45009d2bc90 100644
--- a/arch/ia64/kernel/mca_drv.c
+++ b/arch/ia64/kernel/mca_drv.c
@@ -79,14 +79,30 @@ static int
 fatal_mca(const char *fmt, ...)
 {
        va_list args;
+        char buf[256];
        va_start(args, fmt);
-        vprintk(fmt, args);
+        vsnprintf(buf, sizeof(buf), fmt, args);
        va_end(args);
+        ia64_mca_printk(KERN_ALERT "MCA: %s\n", buf);
        return MCA_NOT_RECOVERED;
 }
+static int
+mca_recovered(const char *fmt, ...)
+{
+        va_list args;
+        char buf[256];
+        va_start(args, fmt);
+        vsnprintf(buf, sizeof(buf), fmt, args);
+        va_end(args);
+        ia64_mca_printk(KERN_INFO "MCA: %s\n", buf);
+        return MCA_RECOVERED;
+}
 /**
 * mca_page_isolate - isolate a poisoned page in order not to use it later
 * @paddr:      poisoned memory location
@@ -140,6 +156,7 @@ mca_page_isolate(unsigned long paddr)
 void
 mca_handler_bh(unsigned long paddr, void *iip, unsigned long ipsr)
 {
+        ia64_mlogbuf_dump();
        printk(KERN_ERR "OS_MCA: process [cpu %d, pid: %d, uid: %d, "
                "iip: %p, psr: 0x%lx,paddr: 0x%lx](%s) encounters MCA.\n",
                raw_smp_processor_id(), current->pid, current->uid,
@@ -440,7 +457,7 @@ recover_from_read_error(slidx_table_t *slidx,
        /* Is target address valid? */
        if (!pbci->tv)
-                return fatal_mca(KERN_ALERT "MCA: target address not valid\n");
+                return fatal_mca("target address not valid");
        /*
         * cpu read or memory-mapped io read
@@ -458,7 +475,7 @@ recover_from_read_error(slidx_table_t *slidx,
        /* Is minstate valid? */
        if (!peidx_bottom(peidx) || !(peidx_bottom(peidx)->valid.minstate))
-                return fatal_mca(KERN_ALERT "MCA: minstate not valid\n");
+                return fatal_mca("minstate not valid");
        psr1 =(struct ia64_psr *)&(peidx_minstate_area(peidx)->pmsa_ipsr);
        psr2 =(struct ia64_psr *)&(peidx_minstate_area(peidx)->pmsa_xpsr);
@@ -492,13 +509,14 @@ recover_from_read_error(slidx_table_t *slidx,
                        psr2->bn  = 1;
                        psr2->i  = 0;
-                        return MCA_RECOVERED;
+                        return mca_recovered("user memory corruption. "
+                                "kill affected process - recovered.");
                }
        }
-        return fatal_mca(KERN_ALERT "MCA: kernel context not recovered,"
+        return fatal_mca("kernel context not recovered, iip 0x%lx\n",
-                          " iip 0x%lx\n", pmsa->pmsa_iip);
+                         pmsa->pmsa_iip);
 }
 /**
@@ -584,13 +602,13 @@ recover_from_processor_error(int platform, slidx_table_t *slidx,
         * The machine check is corrected.
         */
        if (psp->cm == 1)
-                return MCA_RECOVERED;
+                return mca_recovered("machine check is already corrected.");
        /*
         * The error was not contained.  Software must be reset.
         */
        if (psp->us || psp->ci == 0)
-                return fatal_mca(KERN_ALERT "MCA: error not contained\n");
+                return fatal_mca("error not contained");
        /*
         * The cache check and bus check bits have four possible states
@@ -601,22 +619,22 @@ recover_from_processor_error(int platform, slidx_table_t *slidx,
         *    1  1      Memory error, attempt recovery
         */
        if (psp->bc == 0 || pbci == NULL)
-                return fatal_mca(KERN_ALERT "MCA: No bus check\n");
+                return fatal_mca("No bus check");
        /*
         * Sorry, we cannot handle so many.
         */
        if (peidx_bus_check_num(peidx) > 1)
-                return fatal_mca(KERN_ALERT "MCA: Too many bus checks\n");
+                return fatal_mca("Too many bus checks");
        /*
         * Well, here is only one bus error.
         */
        if (pbci->ib)
-                return fatal_mca(KERN_ALERT "MCA: Internal Bus error\n");
+                return fatal_mca("Internal Bus error");
        if (pbci->cc)
-                return fatal_mca(KERN_ALERT "MCA: Cache-cache error\n");
+                return fatal_mca("Cache-cache error");
        if (pbci->eb && pbci->bsi > 0)
-                return fatal_mca(KERN_ALERT "MCA: External bus check fatal status\n");
+                return fatal_mca("External bus check fatal status");
        /*
         * This is a local MCA and estimated as recoverble external bus error.
@@ -628,7 +646,7 @@ recover_from_processor_error(int platform, slidx_table_t *slidx,
        /*
         * On account of strange SAL error record, we cannot recover.
         */
-        return fatal_mca(KERN_ALERT "MCA: Strange SAL record\n");
+        return fatal_mca("Strange SAL record");
 }
 /**
@@ -657,10 +675,10 @@ mca_try_to_recover(void *rec, struct ia64_sal_os_state *sos)
         /* Now, OS can recover when there is one processor error section */
        if (n_proc_err > 1)
-                return fatal_mca(KERN_ALERT "MCA: Too Many Errors\n");
+                return fatal_mca("Too Many Errors");
        else if (n_proc_err == 0)
-                /* Weird SAL record ... We need not to recover */
+                /* Weird SAL record ... We can't do anything */
-                return fatal_mca(KERN_ALERT "MCA: Weird SAL record\n");
+                return fatal_mca("Weird SAL record");
        /* Make index of processor error section */
        mca_make_peidx((sal_log_processor_info_t*)
@@ -671,7 +689,7 @@ mca_try_to_recover(void *rec, struct ia64_sal_os_state *sos)
        /* Check whether MCA is global or not */
        if (is_mca_global(&peidx, &pbci, sos))
-                return fatal_mca(KERN_ALERT "MCA: global MCA\n");
+                return fatal_mca("global MCA");
        
        /* Try to recover a processor error */
        return recover_from_processor_error(platform_err, &slidx, &peidx,
diff --git a/arch/ia64/kernel/mca_drv.h b/arch/ia64/kernel/mca_drv.h
index 31a2e52bb16f..c85e943ba5fd 100644
--- a/arch/ia64/kernel/mca_drv.h
+++ b/arch/ia64/kernel/mca_drv.h
@@ -118,3 +118,7 @@ struct mca_table_entry {
 extern const struct mca_table_entry *search_mca_tables (unsigned long addr);
 extern int mca_recover_range(unsigned long);
+extern void ia64_mca_printk(const char * fmt, ...)
+         __attribute__ ((format (printf, 1, 2)));
+extern void ia64_mlogbuf_dump(void);
diff --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c
index 7bb7696e4ce2..281004ff7b00 100644
--- a/arch/ia64/kernel/perfmon.c
+++ b/arch/ia64/kernel/perfmon.c
@@ -63,6 +63,9 @@
 #define PFM_INVALID_ACTIVATION  (~0UL)
+#define PFM_NUM_PMC_REGS        64      /* PMC save area for ctxsw */
+#define PFM_NUM_PMD_REGS        64      /* PMD save area for ctxsw */
 /*
 * depth of message queue
 */
@@ -297,14 +300,17 @@ typedef struct pfm_context {
        unsigned long           ctx_reload_pmcs[4];     /* bitmask of force reload PMC on ctxsw in */
        unsigned long           ctx_used_monitors[4];   /* bitmask of monitor PMC being used */
-        unsigned long           ctx_pmcs[IA64_NUM_PMC_REGS];    /*  saved copies of PMC values */
+        unsigned long           ctx_pmcs[PFM_NUM_PMC_REGS];     /*  saved copies of PMC values */
        unsigned int            ctx_used_ibrs[1];               /* bitmask of used IBR (speedup ctxsw in) */
        unsigned int            ctx_used_dbrs[1];               /* bitmask of used DBR (speedup ctxsw in) */
        unsigned long           ctx_dbrs[IA64_NUM_DBG_REGS];    /* DBR values (cache) when not loaded */
        unsigned long           ctx_ibrs[IA64_NUM_DBG_REGS];    /* IBR values (cache) when not loaded */
-        pfm_counter_t           ctx_pmds[IA64_NUM_PMD_REGS]; /* software state for PMDS */
+        pfm_counter_t           ctx_pmds[PFM_NUM_PMD_REGS]; /* software state for PMDS */
+        unsigned long           th_pmcs[PFM_NUM_PMC_REGS];      /* PMC thread save state */
+        unsigned long           th_pmds[PFM_NUM_PMD_REGS];      /* PMD thread save state */
        u64                     ctx_saved_psr_up;       /* only contains psr.up value */
@@ -868,7 +874,6 @@ static void
 pfm_mask_monitoring(struct task_struct *task)
 {
        pfm_context_t *ctx = PFM_GET_CTX(task);
-        struct thread_struct *th = &task->thread;
        unsigned long mask, val, ovfl_mask;
        int i;
@@ -889,7 +894,7 @@ pfm_mask_monitoring(struct task_struct *task)
         * So in both cases, the live register contains the owner's
         * state. We can ONLY touch the PMU registers and NOT the PSR.
         *
-         * As a consequence to this call, the thread->pmds[] array
+         * As a consequence to this call, the ctx->th_pmds[] array
         * contains stale information which must be ignored
         * when context is reloaded AND monitoring is active (see
         * pfm_restart).
@@ -924,9 +929,9 @@ pfm_mask_monitoring(struct task_struct *task)
        mask = ctx->ctx_used_monitors[0] >> PMU_FIRST_COUNTER;
        for(i= PMU_FIRST_COUNTER; mask; i++, mask>>=1) {
                if ((mask & 0x1) == 0UL) continue;
-                ia64_set_pmc(i, th->pmcs[i] & ~0xfUL);
+                ia64_set_pmc(i, ctx->th_pmcs[i] & ~0xfUL);
-                th->pmcs[i] &= ~0xfUL;
+                ctx->th_pmcs[i] &= ~0xfUL;
-                DPRINT_ovfl(("pmc[%d]=0x%lx\n", i, th->pmcs[i]));
+                DPRINT_ovfl(("pmc[%d]=0x%lx\n", i, ctx->th_pmcs[i]));
        }
        /*
         * make all of this visible
@@ -943,7 +948,6 @@ static void
 pfm_restore_monitoring(struct task_struct *task)
 {
        pfm_context_t *ctx = PFM_GET_CTX(task);
-        struct thread_struct *th = &task->thread;
        unsigned long mask, ovfl_mask;
        unsigned long psr, val;
        int i, is_system;
@@ -1009,9 +1013,9 @@ pfm_restore_monitoring(struct task_struct *task)
        mask = ctx->ctx_used_monitors[0] >> PMU_FIRST_COUNTER;
        for(i= PMU_FIRST_COUNTER; mask; i++, mask>>=1) {
                if ((mask & 0x1) == 0UL) continue;
-                th->pmcs[i] = ctx->ctx_pmcs[i];
+                ctx->th_pmcs[i] = ctx->ctx_pmcs[i];
-                ia64_set_pmc(i, th->pmcs[i]);
+                ia64_set_pmc(i, ctx->th_pmcs[i]);
-                DPRINT(("[%d] pmc[%d]=0x%lx\n", task->pid, i, th->pmcs[i]));
+                DPRINT(("[%d] pmc[%d]=0x%lx\n", task->pid, i, ctx->th_pmcs[i]));
        }
        ia64_srlz_d();
@@ -1070,7 +1074,6 @@ pfm_restore_pmds(unsigned long *pmds, unsigned long mask)
 static inline void
 pfm_copy_pmds(struct task_struct *task, pfm_context_t *ctx)
 {
-        struct thread_struct *thread = &task->thread;
        unsigned long ovfl_val = pmu_conf->ovfl_val;
        unsigned long mask = ctx->ctx_all_pmds[0];
        unsigned long val;
@@ -1092,11 +1095,11 @@ pfm_copy_pmds(struct task_struct *task, pfm_context_t *ctx)
                        ctx->ctx_pmds[i].val = val & ~ovfl_val;
                         val &= ovfl_val;
                }
-                thread->pmds[i] = val;
+                ctx->th_pmds[i] = val;
                DPRINT(("pmd[%d]=0x%lx soft_val=0x%lx\n",
                        i,
-                        thread->pmds[i],
+                        ctx->th_pmds[i],
                        ctx->ctx_pmds[i].val));
        }
 }
@@ -1107,7 +1110,6 @@ pfm_copy_pmds(struct task_struct *task, pfm_context_t *ctx)
 static inline void
 pfm_copy_pmcs(struct task_struct *task, pfm_context_t *ctx)
 {
-        struct thread_struct *thread = &task->thread;
        unsigned long mask = ctx->ctx_all_pmcs[0];
        int i;
@@ -1115,8 +1117,8 @@ pfm_copy_pmcs(struct task_struct *task, pfm_context_t *ctx)
        for (i=0; mask; i++, mask>>=1) {
                /* masking 0 with ovfl_val yields 0 */
-                thread->pmcs[i] = ctx->ctx_pmcs[i];
+                ctx->th_pmcs[i] = ctx->ctx_pmcs[i];
-                DPRINT(("pmc[%d]=0x%lx\n", i, thread->pmcs[i]));
+                DPRINT(("pmc[%d]=0x%lx\n", i, ctx->th_pmcs[i]));
        }
 }
@@ -2860,7 +2862,6 @@ pfm_reset_regs(pfm_context_t *ctx, unsigned long *ovfl_regs, int is_long_reset)
 static int
 pfm_write_pmcs(pfm_context_t *ctx, void *arg, int count, struct pt_regs *regs)
 {
-        struct thread_struct *thread = NULL;
        struct task_struct *task;
        pfarg_reg_t *req = (pfarg_reg_t *)arg;
        unsigned long value, pmc_pm;
@@ -2881,7 +2882,6 @@ pfm_write_pmcs(pfm_context_t *ctx, void *arg, int count, struct pt_regs *regs)
        if (state == PFM_CTX_ZOMBIE) return -EINVAL;
        if (is_loaded) {
-                thread = &task->thread;
                /*
                 * In system wide and when the context is loaded, access can only happen
                 * when the caller is running on the CPU being monitored by the session.
@@ -3036,7 +3036,7 @@ pfm_write_pmcs(pfm_context_t *ctx, void *arg, int count, struct pt_regs *regs)
                 *
                 * The value in ctx_pmcs[] can only be changed in pfm_write_pmcs().
                 *
-                 * The value in thread->pmcs[] may be modified on overflow, i.e.,  when
+                 * The value in th_pmcs[] may be modified on overflow, i.e.,  when
                 * monitoring needs to be stopped.
                 */
                if (is_monitor) CTX_USED_MONITOR(ctx, 1UL << cnum);
@@ -3050,7 +3050,7 @@ pfm_write_pmcs(pfm_context_t *ctx, void *arg, int count, struct pt_regs *regs)
                        /*
                         * write thread state
                         */
-                        if (is_system == 0) thread->pmcs[cnum] = value;
+                        if (is_system == 0) ctx->th_pmcs[cnum] = value;
                        /*
                         * write hardware register if we can
@@ -3102,7 +3102,6 @@ error:
 static int
 pfm_write_pmds(pfm_context_t *ctx, void *arg, int count, struct pt_regs *regs)
 {
-        struct thread_struct *thread = NULL;
        struct task_struct *task;
        pfarg_reg_t *req = (pfarg_reg_t *)arg;
        unsigned long value, hw_value, ovfl_mask;
@@ -3126,7 +3125,6 @@ pfm_write_pmds(pfm_context_t *ctx, void *arg, int count, struct pt_regs *regs)
         * the owner of the local PMU.
         */
        if (likely(is_loaded)) {
-                thread = &task->thread;
                /*
                 * In system wide and when the context is loaded, access can only happen
                 * when the caller is running on the CPU being monitored by the session.
@@ -3234,7 +3232,7 @@ pfm_write_pmds(pfm_context_t *ctx, void *arg, int count, struct pt_regs *regs)
                        /*
                         * write thread state
                         */
-                        if (is_system == 0) thread->pmds[cnum] = hw_value;
+                        if (is_system == 0) ctx->th_pmds[cnum] = hw_value;
                        /*
                         * write hardware register if we can
@@ -3300,7 +3298,6 @@ abort_mission:
 static int
 pfm_read_pmds(pfm_context_t *ctx, void *arg, int count, struct pt_regs *regs)
 {
-        struct thread_struct *thread = NULL;
        struct task_struct *task;
        unsigned long val = 0UL, lval, ovfl_mask, sval;
        pfarg_reg_t *req = (pfarg_reg_t *)arg;
@@ -3324,7 +3321,6 @@ pfm_read_pmds(pfm_context_t *ctx, void *arg, int count, struct pt_regs *regs)
        if (state == PFM_CTX_ZOMBIE) return -EINVAL;
        if (likely(is_loaded)) {
-                thread = &task->thread;
                /*
                 * In system wide and when the context is loaded, access can only happen
                 * when the caller is running on the CPU being monitored by the session.
@@ -3386,7 +3382,7 @@ pfm_read_pmds(pfm_context_t *ctx, void *arg, int count, struct pt_regs *regs)
                         * if context is zombie, then task does not exist anymore.
                         * In this case, we use the full value saved in the context (pfm_flush_regs()).
                         */
-                        val = is_loaded ? thread->pmds[cnum] : 0UL;
+                        val = is_loaded ? ctx->th_pmds[cnum] : 0UL;
                }
                rd_func = pmu_conf->pmd_desc[cnum].read_check;
@@ -4355,8 +4351,8 @@ pfm_context_load(pfm_context_t *ctx, void *arg, int count, struct pt_regs *regs)
        pfm_copy_pmds(task, ctx);
        pfm_copy_pmcs(task, ctx);
-        pmcs_source = thread->pmcs;
+        pmcs_source = ctx->th_pmcs;
-        pmds_source = thread->pmds;
+        pmds_source = ctx->th_pmds;
        /*
         * always the case for system-wide
@@ -5865,14 +5861,12 @@ void
 pfm_save_regs(struct task_struct *task)
 {
        pfm_context_t *ctx;
-        struct thread_struct *t;
        unsigned long flags;
        u64 psr;
        ctx = PFM_GET_CTX(task);
        if (ctx == NULL) return;
-        t = &task->thread;
        /*
         * we always come here with interrupts ALREADY disabled by
@@ -5930,19 +5924,19 @@ pfm_save_regs(struct task_struct *task)
         * guarantee we will be schedule at that same
         * CPU again.
         */
-        pfm_save_pmds(t->pmds, ctx->ctx_used_pmds[0]);
+        pfm_save_pmds(ctx->th_pmds, ctx->ctx_used_pmds[0]);
        /*
         * save pmc0 ia64_srlz_d() done in pfm_save_pmds()
         * we will need it on the restore path to check
         * for pending overflow.
         */
-        t->pmcs[0] = ia64_get_pmc(0);
+        ctx->th_pmcs[0] = ia64_get_pmc(0);
        /*
         * unfreeze PMU if had pending overflows
         */
-        if (t->pmcs[0] & ~0x1UL) pfm_unfreeze_pmu();
+        if (ctx->th_pmcs[0] & ~0x1UL) pfm_unfreeze_pmu();
        /*
         * finally, allow context access.
@@ -5987,7 +5981,6 @@ static void
 pfm_lazy_save_regs (struct task_struct *task)
 {
        pfm_context_t *ctx;
-        struct thread_struct *t;
        unsigned long flags;
        { u64 psr  = pfm_get_psr();
@@ -5995,7 +5988,6 @@ pfm_lazy_save_regs (struct task_struct *task)
        }
        ctx = PFM_GET_CTX(task);
-        t   = &task->thread;
        /*
         * we need to mask PMU overflow here to
@@ -6020,19 +6012,19 @@ pfm_lazy_save_regs (struct task_struct *task)
        /*
         * save all the pmds we use
         */
-        pfm_save_pmds(t->pmds, ctx->ctx_used_pmds[0]);
+        pfm_save_pmds(ctx->th_pmds, ctx->ctx_used_pmds[0]);
        /*
         * save pmc0 ia64_srlz_d() done in pfm_save_pmds()
         * it is needed to check for pended overflow
         * on the restore path
         */
-        t->pmcs[0] = ia64_get_pmc(0);
+        ctx->th_pmcs[0] = ia64_get_pmc(0);
        /*
         * unfreeze PMU if had pending overflows
         */
-        if (t->pmcs[0] & ~0x1UL) pfm_unfreeze_pmu();
+        if (ctx->th_pmcs[0] & ~0x1UL) pfm_unfreeze_pmu();
        /*
         * now get can unmask PMU interrupts, they will
@@ -6051,7 +6043,6 @@ void
 pfm_load_regs (struct task_struct *task)
 {
        pfm_context_t *ctx;
-        struct thread_struct *t;
        unsigned long pmc_mask = 0UL, pmd_mask = 0UL;
        unsigned long flags;
        u64 psr, psr_up;
@@ -6062,11 +6053,10 @@ pfm_load_regs (struct task_struct *task)
        BUG_ON(GET_PMU_OWNER());
-        t     = &task->thread;
        /*
         * possible on unload
         */
-        if (unlikely((t->flags & IA64_THREAD_PM_VALID) == 0)) return;
+        if (unlikely((task->thread.flags & IA64_THREAD_PM_VALID) == 0)) return;
        /*
         * we always come here with interrupts ALREADY disabled by
@@ -6148,21 +6138,21 @@ pfm_load_regs (struct task_struct *task)
         *
         * XXX: optimize here
         */
-        if (pmd_mask) pfm_restore_pmds(t->pmds, pmd_mask);
+        if (pmd_mask) pfm_restore_pmds(ctx->th_pmds, pmd_mask);
-        if (pmc_mask) pfm_restore_pmcs(t->pmcs, pmc_mask);
+        if (pmc_mask) pfm_restore_pmcs(ctx->th_pmcs, pmc_mask);
        /*
         * check for pending overflow at the time the state
         * was saved.
         */
-        if (unlikely(PMC0_HAS_OVFL(t->pmcs[0]))) {
+        if (unlikely(PMC0_HAS_OVFL(ctx->th_pmcs[0]))) {
                /*
                 * reload pmc0 with the overflow information
                 * On McKinley PMU, this will trigger a PMU interrupt
                 */
-                ia64_set_pmc(0, t->pmcs[0]);
+                ia64_set_pmc(0, ctx->th_pmcs[0]);
                ia64_srlz_d();
-                t->pmcs[0] = 0UL;
+                ctx->th_pmcs[0] = 0UL;
                /*
                 * will replay the PMU interrupt
@@ -6215,7 +6205,6 @@ pfm_load_regs (struct task_struct *task)
 void
 pfm_load_regs (struct task_struct *task)
 {
-        struct thread_struct *t;
        pfm_context_t *ctx;
        struct task_struct *owner;
        unsigned long pmd_mask, pmc_mask;
@@ -6224,7 +6213,6 @@ pfm_load_regs (struct task_struct *task)
        owner = GET_PMU_OWNER();
        ctx   = PFM_GET_CTX(task);
-        t     = &task->thread;
        psr   = pfm_get_psr();
        BUG_ON(psr & (IA64_PSR_UP|IA64_PSR_PP));
@@ -6287,22 +6275,22 @@ pfm_load_regs (struct task_struct *task)
         */
        pmc_mask = ctx->ctx_all_pmcs[0];
-        pfm_restore_pmds(t->pmds, pmd_mask);
+        pfm_restore_pmds(ctx->th_pmds, pmd_mask);
-        pfm_restore_pmcs(t->pmcs, pmc_mask);
+        pfm_restore_pmcs(ctx->th_pmcs, pmc_mask);
        /*
         * check for pending overflow at the time the state
         * was saved.
         */
-        if (unlikely(PMC0_HAS_OVFL(t->pmcs[0]))) {
+        if (unlikely(PMC0_HAS_OVFL(ctx->th_pmcs[0]))) {
                /*
                 * reload pmc0 with the overflow information
                 * On McKinley PMU, this will trigger a PMU interrupt
                 */
-                ia64_set_pmc(0, t->pmcs[0]);
+                ia64_set_pmc(0, ctx->th_pmcs[0]);
                ia64_srlz_d();
-                t->pmcs[0] = 0UL;
+                ctx->th_pmcs[0] = 0UL;
                /*
                 * will replay the PMU interrupt
@@ -6377,11 +6365,11 @@ pfm_flush_pmds(struct task_struct *task, pfm_context_t *ctx)
                 */
                pfm_unfreeze_pmu();
        } else {
-                pmc0 = task->thread.pmcs[0];
+                pmc0 = ctx->th_pmcs[0];
                /*
                 * clear whatever overflow status bits there were
                 */
-                task->thread.pmcs[0] = 0;
+                ctx->th_pmcs[0] = 0;
        }
        ovfl_val = pmu_conf->ovfl_val;
        /*
@@ -6402,7 +6390,7 @@ pfm_flush_pmds(struct task_struct *task, pfm_context_t *ctx)
                /*
                 * can access PMU always true in system wide mode
                 */
-                val = pmd_val = can_access_pmu ? ia64_get_pmd(i) : task->thread.pmds[i];
+                val = pmd_val = can_access_pmu ? ia64_get_pmd(i) : ctx->th_pmds[i];
                if (PMD_IS_COUNTING(i)) {
                        DPRINT(("[%d] pmd[%d] ctx_pmd=0x%lx hw_pmd=0x%lx\n",
@@ -6434,7 +6422,7 @@ pfm_flush_pmds(struct task_struct *task, pfm_context_t *ctx)
                DPRINT(("[%d] ctx_pmd[%d]=0x%lx  pmd_val=0x%lx\n", task->pid, i, val, pmd_val));
-                if (is_self) task->thread.pmds[i] = pmd_val;
+                if (is_self) ctx->th_pmds[i] = pmd_val;
                ctx->ctx_pmds[i].val = val;
        }
@@ -6678,7 +6666,7 @@ pfm_init(void)
               ffz(pmu_conf->ovfl_val));
        /* sanity check */
-        if (pmu_conf->num_pmds >= IA64_NUM_PMD_REGS || pmu_conf->num_pmcs >= IA64_NUM_PMC_REGS) {
+        if (pmu_conf->num_pmds >= PFM_NUM_PMD_REGS || pmu_conf->num_pmcs >= PFM_NUM_PMC_REGS) {
                printk(KERN_ERR "perfmon: not enough pmc/pmd, perfmon disabled\n");
                pmu_conf = NULL;
                return -1;
@@ -6753,7 +6741,6 @@ void
 dump_pmu_state(const char *from)
 {
        struct task_struct *task;
-        struct thread_struct *t;
        struct pt_regs *regs;
        pfm_context_t *ctx;
        unsigned long psr, dcr, info, flags;
@@ -6798,16 +6785,14 @@ dump_pmu_state(const char *from)
        ia64_psr(regs)->up = 0;
        ia64_psr(regs)->pp = 0;
-        t = &current->thread;
        for (i=1; PMC_IS_LAST(i) == 0; i++) {
                if (PMC_IS_IMPL(i) == 0) continue;
-                printk("->CPU%d pmc[%d]=0x%lx thread_pmc[%d]=0x%lx\n", this_cpu, i, ia64_get_pmc(i), i, t->pmcs[i]);
+                printk("->CPU%d pmc[%d]=0x%lx thread_pmc[%d]=0x%lx\n", this_cpu, i, ia64_get_pmc(i), i, ctx->th_pmcs[i]);
        }
        for (i=1; PMD_IS_LAST(i) == 0; i++) {
                if (PMD_IS_IMPL(i) == 0) continue;
-                printk("->CPU%d pmd[%d]=0x%lx thread_pmd[%d]=0x%lx\n", this_cpu, i, ia64_get_pmd(i), i, t->pmds[i]);
+                printk("->CPU%d pmd[%d]=0x%lx thread_pmd[%d]=0x%lx\n", this_cpu, i, ia64_get_pmd(i), i, ctx->th_pmds[i]);
        }
        if (ctx) {
diff --git a/arch/ia64/kernel/salinfo.c b/arch/ia64/kernel/salinfo.c
index 9065f0f01ba3..e63b8ca5344a 100644
--- a/arch/ia64/kernel/salinfo.c
+++ b/arch/ia64/kernel/salinfo.c
@@ -266,6 +266,7 @@ salinfo_log_wakeup(int type, u8 *buffer, u64 size, int irqsafe)
 /* Check for outstanding MCA/INIT records every minute (arbitrary) */
 #define SALINFO_TIMER_DELAY (60*HZ)
 static struct timer_list salinfo_timer;
+extern void ia64_mlogbuf_dump(void);
 static void
 salinfo_timeout_check(struct salinfo_data *data)
@@ -283,6 +284,7 @@ salinfo_timeout_check(struct salinfo_data *data)
 static void
 salinfo_timeout (unsigned long arg)
 {
+        ia64_mlogbuf_dump();
        salinfo_timeout_check(salinfo_data + SAL_INFO_TYPE_MCA);
        salinfo_timeout_check(salinfo_data + SAL_INFO_TYPE_INIT);
        salinfo_timer.expires = jiffies + SALINFO_TIMER_DELAY;
@@ -332,6 +334,8 @@ retry:
        if (cpu == -1)
                goto retry;
+        ia64_mlogbuf_dump();
        /* for next read, start checking at next CPU */
        data->cpu_check = cpu;
        if (++data->cpu_check == NR_CPUS)
diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c
index 7ad0d9cc6db6..84f93c0f2c66 100644
--- a/arch/ia64/kernel/setup.c
+++ b/arch/ia64/kernel/setup.c
@@ -509,7 +509,7 @@ show_cpuinfo (struct seq_file *m, void *v)
                { 1UL << 1, "spontaneous deferral"},
                { 1UL << 2, "16-byte atomic ops" }
        };
-        char family[32], features[128], *cp, sep;
+        char features[128], *cp, sep;
        struct cpuinfo_ia64 *c = v;
        unsigned long mask;
        unsigned long proc_freq;
@@ -517,12 +517,6 @@ show_cpuinfo (struct seq_file *m, void *v)
        mask = c->features;
-        switch (c->family) {
-              case 0x07:        memcpy(family, "Itanium", 8); break;
-              case 0x1f:        memcpy(family, "Itanium 2", 10); break;
-              default:          sprintf(family, "%u", c->family); break;
-        }
        /* build the feature string: */
        memcpy(features, " standard", 10);
        cp = features;
@@ -553,8 +547,9 @@ show_cpuinfo (struct seq_file *m, void *v)
                   "processor  : %d\n"
                   "vendor     : %s\n"
                   "arch       : IA-64\n"
-                   "family     : %s\n"
+                   "family     : %u\n"
                   "model      : %u\n"
+                   "model name : %s\n"
                   "revision   : %u\n"
                   "archrev    : %u\n"
                   "features   :%s\n"   /* don't change this---it _is_ right! */
@@ -563,7 +558,8 @@ show_cpuinfo (struct seq_file *m, void *v)
                   "cpu MHz    : %lu.%06lu\n"
                   "itc MHz    : %lu.%06lu\n"
                   "BogoMIPS   : %lu.%02lu\n",
-                   cpunum, c->vendor, family, c->model, c->revision, c->archrev,
+                   cpunum, c->vendor, c->family, c->model,
+                   c->model_name, c->revision, c->archrev,
                   features, c->ppn, c->number,
                   proc_freq / 1000, proc_freq % 1000,
                   c->itc_freq / 1000000, c->itc_freq % 1000000,
@@ -611,6 +607,31 @@ struct seq_operations cpuinfo_op = {
        .show =         show_cpuinfo
 };
+static char brandname[128];
+static char * __cpuinit
+get_model_name(__u8 family, __u8 model)
+{
+        char brand[128];
+        if (ia64_pal_get_brand_info(brand)) {
+                if (family == 0x7)
+                        memcpy(brand, "Merced", 7);
+                else if (family == 0x1f) switch (model) {
+                        case 0: memcpy(brand, "McKinley", 9); break;
+                        case 1: memcpy(brand, "Madison", 8); break;
+                        case 2: memcpy(brand, "Madison up to 9M cache", 23); break;
+                } else
+                        memcpy(brand, "Unknown", 8);
+        }
+        if (brandname[0] == '\0')
+                return strcpy(brandname, brand);
+        else if (strcmp(brandname, brand) == 0)
+                return brandname;
+        else
+                return kstrdup(brand, GFP_KERNEL);
+}
 static void __cpuinit
 identify_cpu (struct cpuinfo_ia64 *c)
 {
@@ -640,7 +661,6 @@ identify_cpu (struct cpuinfo_ia64 *c)
        pal_status_t status;
        unsigned long impl_va_msb = 50, phys_addr_size = 44;    /* Itanium defaults */
        int i;
        for (i = 0; i < 5; ++i)
                cpuid.bits[i] = ia64_get_cpuid(i);
@@ -663,6 +683,7 @@ identify_cpu (struct cpuinfo_ia64 *c)
        c->family = cpuid.field.family;
        c->archrev = cpuid.field.archrev;
        c->features = cpuid.field.features;
+        c->model_name = get_model_name(c->family, c->model);
        status = ia64_pal_vm_summary(&vm1, &vm2);
        if (status == PAL_STATUS_SUCCESS) {
diff --git a/arch/ia64/kernel/smpboot.c b/arch/ia64/kernel/smpboot.c
index 6203ed4ec8cf..f7d7f5668144 100644
--- a/arch/ia64/kernel/smpboot.c
+++ b/arch/ia64/kernel/smpboot.c
@@ -879,3 +879,27 @@ identify_siblings(struct cpuinfo_ia64 *c)
        c->core_id = info.log1_cid;
        c->thread_id = info.log1_tid;
 }
+/*
+ * returns non zero, if multi-threading is enabled
+ * on at least one physical package. Due to hotplug cpu
+ * and (maxcpus=), all threads may not necessarily be enabled
+ * even though the processor supports multi-threading.
+ */
+int is_multithreading_enabled(void)
+{
+        int i, j;
+        for_each_present_cpu(i) {
+                for_each_present_cpu(j) {
+                        if (j == i)
+                                continue;
+                        if ((cpu_data(j)->socket_id == cpu_data(i)->socket_id)) {
+                                if (cpu_data(j)->core_id == cpu_data(i)->core_id)
+                                        return 1;
+                        }
+                }
+        }
+        return 0;
+}
+EXPORT_SYMBOL_GPL(is_multithreading_enabled);
diff --git a/arch/ia64/kernel/vmlinux.lds.S b/arch/ia64/kernel/vmlinux.lds.S
index 5b0d5f64a9b1..b3b2e389d6b2 100644
--- a/arch/ia64/kernel/vmlinux.lds.S
+++ b/arch/ia64/kernel/vmlinux.lds.S
@@ -184,7 +184,9 @@ SECTIONS
          *(.data.gate)
          __stop_gate_section = .;
        }
-  . = ALIGN(PAGE_SIZE);         /* make sure the gate page doesn't expose kernel data */
+  . = ALIGN(PAGE_SIZE);         /* make sure the gate page doesn't expose
+                                 * kernel data
+                                 */
  .data.read_mostly : AT(ADDR(.data.read_mostly) - LOAD_OFFSET)
        { *(.data.read_mostly) }
@@ -202,7 +204,9 @@ SECTIONS
                *(.data.percpu)
                __per_cpu_end = .;
        }
-  . = __phys_per_cpu_start + PERCPU_PAGE_SIZE;  /* ensure percpu data fits into percpu page size */
+  . = __phys_per_cpu_start + PERCPU_PAGE_SIZE;  /* ensure percpu data fits
+                                                 * into percpu page size
+                                                 */
  data : { } :data
  .data : AT(ADDR(.data) - LOAD_OFFSET)
diff --git a/arch/ia64/mm/contig.c b/arch/ia64/mm/contig.c
index 719d476e71ba..daf977ff2920 100644
--- a/arch/ia64/mm/contig.c
+++ b/arch/ia64/mm/contig.c
@@ -40,10 +40,11 @@ show_mem (void)
        int i, total = 0, reserved = 0;
        int shared = 0, cached = 0;
-        printk("Mem-info:\n");
+        printk(KERN_INFO "Mem-info:\n");
        show_free_areas();
-        printk("Free swap:       %6ldkB\n", nr_swap_pages<<(PAGE_SHIFT-10));
+        printk(KERN_INFO "Free swap:       %6ldkB\n",
+               nr_swap_pages<<(PAGE_SHIFT-10));
        i = max_mapnr;
        for (i = 0; i < max_mapnr; i++) {
                if (!pfn_valid(i)) {
@@ -62,12 +63,12 @@ show_mem (void)
                else if (page_count(mem_map + i))
                        shared += page_count(mem_map + i) - 1;
        }
-        printk("%d pages of RAM\n", total);
+        printk(KERN_INFO "%d pages of RAM\n", total);
-        printk("%d reserved pages\n", reserved);
+        printk(KERN_INFO "%d reserved pages\n", reserved);
-        printk("%d pages shared\n", shared);
+        printk(KERN_INFO "%d pages shared\n", shared);
-        printk("%d pages swap cached\n", cached);
+        printk(KERN_INFO "%d pages swap cached\n", cached);
-        printk("%ld pages in page table cache\n",
+        printk(KERN_INFO "%ld pages in page table cache\n",
-                pgtable_quicklist_total_size());
+               pgtable_quicklist_total_size());
 }
 /* physical address where the bootmem map is located */
diff --git a/arch/ia64/mm/discontig.c b/arch/ia64/mm/discontig.c
index 7bd28079dcc4..d497b6b0f5b2 100644
--- a/arch/ia64/mm/discontig.c
+++ b/arch/ia64/mm/discontig.c
@@ -547,15 +547,16 @@ void show_mem(void)
        unsigned long total_present = 0;
        pg_data_t *pgdat;
-        printk("Mem-info:\n");
+        printk(KERN_INFO "Mem-info:\n");
        show_free_areas();
-        printk("Free swap:       %6ldkB\n", nr_swap_pages<<(PAGE_SHIFT-10));
+        printk(KERN_INFO "Free swap:       %6ldkB\n",
+               nr_swap_pages<<(PAGE_SHIFT-10));
+        printk(KERN_INFO "Node memory in pages:\n");
        for_each_online_pgdat(pgdat) {
                unsigned long present;
                unsigned long flags;
                int shared = 0, cached = 0, reserved = 0;
-                printk("Node ID: %d\n", pgdat->node_id);
                pgdat_resize_lock(pgdat, &flags);
                present = pgdat->node_present_pages;
                for(i = 0; i < pgdat->node_spanned_pages; i++) {
@@ -579,18 +580,17 @@ void show_mem(void)
                total_reserved += reserved;
                total_cached += cached;
                total_shared += shared;
-                printk("\t%ld pages of RAM\n", present);
+                printk(KERN_INFO "Node %4d:  RAM: %11ld, rsvd: %8d, "
-                printk("\t%d reserved pages\n", reserved);
+                       "shrd: %10d, swpd: %10d\n", pgdat->node_id,
-                printk("\t%d pages shared\n", shared);
+                       present, reserved, shared, cached);
-                printk("\t%d pages swap cached\n", cached);
        }
-        printk("%ld pages of RAM\n", total_present);
+        printk(KERN_INFO "%ld pages of RAM\n", total_present);
-        printk("%d reserved pages\n", total_reserved);
+        printk(KERN_INFO "%d reserved pages\n", total_reserved);
-        printk("%d pages shared\n", total_shared);
+        printk(KERN_INFO "%d pages shared\n", total_shared);
-        printk("%d pages swap cached\n", total_cached);
+        printk(KERN_INFO "%d pages swap cached\n", total_cached);
-        printk("Total of %ld pages in page table cache\n",
+        printk(KERN_INFO "Total of %ld pages in page table cache\n",
-                pgtable_quicklist_total_size());
+               pgtable_quicklist_total_size());
-        printk("%d free buffer pages\n", nr_free_buffer_pages());
+        printk(KERN_INFO "%d free buffer pages\n", nr_free_buffer_pages());
 }
 /**
diff --git a/arch/ia64/sn/kernel/bte.c b/arch/ia64/sn/kernel/bte.c
index 27dee4584061..7f73ad4408aa 100644
--- a/arch/ia64/sn/kernel/bte.c
+++ b/arch/ia64/sn/kernel/bte.c
@@ -277,8 +277,7 @@ bte_result_t bte_unaligned_copy(u64 src, u64 dest, u64 len, u64 mode)
        }
        /* temporary buffer used during unaligned transfers */
-        bteBlock_unaligned = kmalloc(len + 3 * L1_CACHE_BYTES,
+        bteBlock_unaligned = kmalloc(len + 3 * L1_CACHE_BYTES, GFP_KERNEL);
-                                     GFP_KERNEL | GFP_DMA);
        if (bteBlock_unaligned == NULL) {
                return BTEFAIL_NOTAVAIL;
        }