11 files changed, 58 insertions, 168 deletions

diff --git a/arch/powerpc/kernel/cpu_setup_fsl_booke.S b/arch/powerpc/kernel/cpu_setup_fsl_booke.S
index 894e64fa481e..5c518ad3445c 100644
--- a/arch/powerpc/kernel/cpu_setup_fsl_booke.S
+++ b/arch/powerpc/kernel/cpu_setup_fsl_booke.S
@@ -64,6 +64,12 @@ _GLOBAL(__setup_cpu_e500v2)
         bl      __e500_icache_setup
         bl      __e500_dcache_setup
         bl      __setup_e500_ivors
+#ifdef CONFIG_RAPIDIO
+        /* Ensure that RFXE is set */
+        mfspr   r3,SPRN_HID1
+        oris    r3,r3,HID1_RFXE@h
+        mtspr   SPRN_HID1,r3
+#endif
         mtlr    r4
         blr
 _GLOBAL(__setup_cpu_e500mc)
diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index be5ab18b03b5..8d74a24c5502 100644
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -116,7 +116,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
                 .pmc_type               = PPC_PMC_IBM,
                 .oprofile_cpu_type      = "ppc64/power3",
                 .oprofile_type          = PPC_OPROFILE_RS64,
-                .machine_check          = machine_check_generic,
                 .platform               = "power3",
         },
         {       /* Power3+ */
@@ -132,7 +131,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
                 .pmc_type               = PPC_PMC_IBM,
                 .oprofile_cpu_type      = "ppc64/power3",
                 .oprofile_type          = PPC_OPROFILE_RS64,
-                .machine_check          = machine_check_generic,
                 .platform               = "power3",
         },
         {       /* Northstar */
@@ -148,7 +146,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
                 .pmc_type               = PPC_PMC_IBM,
                 .oprofile_cpu_type      = "ppc64/rs64",
                 .oprofile_type          = PPC_OPROFILE_RS64,
-                .machine_check          = machine_check_generic,
                 .platform               = "rs64",
         },
         {       /* Pulsar */
@@ -164,7 +161,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
                 .pmc_type               = PPC_PMC_IBM,
                 .oprofile_cpu_type      = "ppc64/rs64",
                 .oprofile_type          = PPC_OPROFILE_RS64,
-                .machine_check          = machine_check_generic,
                 .platform               = "rs64",
         },
         {       /* I-star */
@@ -180,7 +176,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
                 .pmc_type               = PPC_PMC_IBM,
                 .oprofile_cpu_type      = "ppc64/rs64",
                 .oprofile_type          = PPC_OPROFILE_RS64,
-                .machine_check          = machine_check_generic,
                 .platform               = "rs64",
         },
         {       /* S-star */
@@ -196,7 +191,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
                 .pmc_type               = PPC_PMC_IBM,
                 .oprofile_cpu_type      = "ppc64/rs64",
                 .oprofile_type          = PPC_OPROFILE_RS64,
-                .machine_check          = machine_check_generic,
                 .platform               = "rs64",
         },
         {       /* Power4 */
@@ -212,7 +206,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
                 .pmc_type               = PPC_PMC_IBM,
                 .oprofile_cpu_type      = "ppc64/power4",
                 .oprofile_type          = PPC_OPROFILE_POWER4,
-                .machine_check          = machine_check_generic,
                 .platform               = "power4",
         },
         {       /* Power4+ */
@@ -228,7 +221,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
                 .pmc_type               = PPC_PMC_IBM,
                 .oprofile_cpu_type      = "ppc64/power4",
                 .oprofile_type          = PPC_OPROFILE_POWER4,
-                .machine_check          = machine_check_generic,
                 .platform               = "power4",
         },
         {       /* PPC970 */
@@ -247,7 +239,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
                 .cpu_restore            = __restore_cpu_ppc970,
                 .oprofile_cpu_type      = "ppc64/970",
                 .oprofile_type          = PPC_OPROFILE_POWER4,
-                .machine_check          = machine_check_generic,
                 .platform               = "ppc970",
         },
         {       /* PPC970FX */
@@ -266,7 +257,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
                 .cpu_restore            = __restore_cpu_ppc970,
                 .oprofile_cpu_type      = "ppc64/970",
                 .oprofile_type          = PPC_OPROFILE_POWER4,
-                .machine_check          = machine_check_generic,
                 .platform               = "ppc970",
         },
         {       /* PPC970MP DD1.0 - no DEEPNAP, use regular 970 init */
@@ -285,7 +275,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
                 .cpu_restore            = __restore_cpu_ppc970,
                 .oprofile_cpu_type      = "ppc64/970MP",
                 .oprofile_type          = PPC_OPROFILE_POWER4,
-                .machine_check          = machine_check_generic,
                 .platform               = "ppc970",
         },
         {       /* PPC970MP */
@@ -304,7 +293,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
                 .cpu_restore            = __restore_cpu_ppc970,
                 .oprofile_cpu_type      = "ppc64/970MP",
                 .oprofile_type          = PPC_OPROFILE_POWER4,
-                .machine_check          = machine_check_generic,
                 .platform               = "ppc970",
         },
         {       /* PPC970GX */
@@ -322,7 +310,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
                 .cpu_setup              = __setup_cpu_ppc970,
                 .oprofile_cpu_type      = "ppc64/970",
                 .oprofile_type          = PPC_OPROFILE_POWER4,
-                .machine_check          = machine_check_generic,
                 .platform               = "ppc970",
         },
         {       /* Power5 GR */
@@ -343,7 +330,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
                  */
                 .oprofile_mmcra_sihv    = MMCRA_SIHV,
                 .oprofile_mmcra_sipr    = MMCRA_SIPR,
-                .machine_check          = machine_check_generic,
                 .platform               = "power5",
         },
         {       /* Power5++ */
@@ -360,7 +346,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
                 .oprofile_type          = PPC_OPROFILE_POWER4,
                 .oprofile_mmcra_sihv    = MMCRA_SIHV,
                 .oprofile_mmcra_sipr    = MMCRA_SIPR,
-                .machine_check          = machine_check_generic,
                 .platform               = "power5+",
         },
         {       /* Power5 GS */
@@ -378,7 +363,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
                 .oprofile_type          = PPC_OPROFILE_POWER4,
                 .oprofile_mmcra_sihv    = MMCRA_SIHV,
                 .oprofile_mmcra_sipr    = MMCRA_SIPR,
-                .machine_check          = machine_check_generic,
                 .platform               = "power5+",
         },
         {       /* POWER6 in P5+ mode; 2.04-compliant processor */
@@ -390,7 +374,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
                 .mmu_features           = MMU_FTR_HPTE_TABLE,
                 .icache_bsize           = 128,
                 .dcache_bsize           = 128,
-                .machine_check          = machine_check_generic,
                 .oprofile_cpu_type      = "ppc64/ibm-compat-v1",
                 .oprofile_type          = PPC_OPROFILE_POWER4,
                 .platform               = "power5+",
@@ -413,7 +396,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
                 .oprofile_mmcra_sipr    = POWER6_MMCRA_SIPR,
                 .oprofile_mmcra_clear   = POWER6_MMCRA_THRM |
                         POWER6_MMCRA_OTHER,
-                .machine_check          = machine_check_generic,
                 .platform               = "power6x",
         },
         {       /* 2.05-compliant processor, i.e. Power6 "architected" mode */
@@ -425,7 +407,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
                 .mmu_features           = MMU_FTR_HPTE_TABLE,
                 .icache_bsize           = 128,
                 .dcache_bsize           = 128,
-                .machine_check          = machine_check_generic,
                 .oprofile_cpu_type      = "ppc64/ibm-compat-v1",
                 .oprofile_type          = PPC_OPROFILE_POWER4,
                 .platform               = "power6",
@@ -440,7 +421,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
                         MMU_FTR_TLBIE_206,
                 .icache_bsize           = 128,
                 .dcache_bsize           = 128,
-                .machine_check          = machine_check_generic,
                 .oprofile_type          = PPC_OPROFILE_POWER4,
                 .oprofile_cpu_type      = "ppc64/ibm-compat-v1",
                 .platform               = "power7",
@@ -492,7 +472,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
                 .pmc_type               = PPC_PMC_IBM,
                 .oprofile_cpu_type      = "ppc64/cell-be",
                 .oprofile_type          = PPC_OPROFILE_CELL,
-                .machine_check          = machine_check_generic,
                 .platform               = "ppc-cell-be",
         },
         {       /* PA Semi PA6T */
@@ -510,7 +489,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
                 .cpu_restore            = __restore_cpu_pa6t,
                 .oprofile_cpu_type      = "ppc64/pa6t",
                 .oprofile_type          = PPC_OPROFILE_PA6T,
-                .machine_check          = machine_check_generic,
                 .platform               = "pa6t",
         },
         {       /* default match */
@@ -524,7 +502,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
                 .dcache_bsize           = 128,
                 .num_pmcs               = 6,
                 .pmc_type               = PPC_PMC_IBM,
-                .machine_check          = machine_check_generic,
                 .platform               = "power4",
         }
 #endif  /* CONFIG_PPC_BOOK3S_64 */
diff --git a/arch/powerpc/kernel/crash.c b/arch/powerpc/kernel/crash.c
index 832c8c4db254..3d569e2aff18 100644
--- a/arch/powerpc/kernel/crash.c
+++ b/arch/powerpc/kernel/crash.c
@@ -48,7 +48,7 @@ int crashing_cpu = -1;
 static cpumask_t cpus_in_crash = CPU_MASK_NONE;
 cpumask_t cpus_in_sr = CPU_MASK_NONE;
 
-#define CRASH_HANDLER_MAX 2
+#define CRASH_HANDLER_MAX 3
 /* NULL terminated list of shutdown handles */
 static crash_shutdown_t crash_shutdown_handles[CRASH_HANDLER_MAX+1];
 static DEFINE_SPINLOCK(crash_handlers_lock);
@@ -125,7 +125,7 @@ static void crash_kexec_prepare_cpus(int cpu)
         smp_wmb();
 
         /*
-         * FIXME: Until we will have the way to stop other CPUSs reliabally,
+         * FIXME: Until we will have the way to stop other CPUs reliably,
          * the crash CPU will send an IPI and wait for other CPUs to
          * respond.
          * Delay of at least 10 seconds.
@@ -254,72 +254,6 @@ void crash_kexec_secondary(struct pt_regs *regs)
         cpus_in_sr = CPU_MASK_NONE;
 }
 #endif
-#ifdef CONFIG_SPU_BASE
-
-#include <asm/spu.h>
-#include <asm/spu_priv1.h>
-
-struct crash_spu_info {
-        struct spu *spu;
-        u32 saved_spu_runcntl_RW;
-        u32 saved_spu_status_R;
-        u32 saved_spu_npc_RW;
-        u64 saved_mfc_sr1_RW;
-        u64 saved_mfc_dar;
-        u64 saved_mfc_dsisr;
-};
-
-#define CRASH_NUM_SPUS  16      /* Enough for current hardware */
-static struct crash_spu_info crash_spu_info[CRASH_NUM_SPUS];
-
-static void crash_kexec_stop_spus(void)
-{
-        struct spu *spu;
-        int i;
-        u64 tmp;
-
-        for (i = 0; i < CRASH_NUM_SPUS; i++) {
-                if (!crash_spu_info[i].spu)
-                        continue;
-
-                spu = crash_spu_info[i].spu;
-
-                crash_spu_info[i].saved_spu_runcntl_RW =
-                        in_be32(&spu->problem->spu_runcntl_RW);
-                crash_spu_info[i].saved_spu_status_R =
-                        in_be32(&spu->problem->spu_status_R);
-                crash_spu_info[i].saved_spu_npc_RW =
-                        in_be32(&spu->problem->spu_npc_RW);
-
-                crash_spu_info[i].saved_mfc_dar    = spu_mfc_dar_get(spu);
-                crash_spu_info[i].saved_mfc_dsisr  = spu_mfc_dsisr_get(spu);
-                tmp = spu_mfc_sr1_get(spu);
-                crash_spu_info[i].saved_mfc_sr1_RW = tmp;
-
-                tmp &= ~MFC_STATE1_MASTER_RUN_CONTROL_MASK;
-                spu_mfc_sr1_set(spu, tmp);
-
-                __delay(200);
-        }
-}
-
-void crash_register_spus(struct list_head *list)
-{
-        struct spu *spu;
-
-        list_for_each_entry(spu, list, full_list) {
-                if (WARN_ON(spu->number >= CRASH_NUM_SPUS))
-                        continue;
-
-                crash_spu_info[spu->number].spu = spu;
-        }
-}
-
-#else
-static inline void crash_kexec_stop_spus(void)
-{
-}
-#endif /* CONFIG_SPU_BASE */
 
 /*
  * Register a function to be called on shutdown.  Only use this if you
@@ -439,8 +373,6 @@ void default_machine_crash_shutdown(struct pt_regs *regs)
         crash_shutdown_cpu = -1;
         __debugger_fault_handler = old_handler;
 
-        crash_kexec_stop_spus();
-
         if (ppc_md.kexec_cpu_down)
                 ppc_md.kexec_cpu_down(1, 0);
 }
diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S
index c22dc1ec1c94..56212bc0ab08 100644
--- a/arch/powerpc/kernel/entry_32.S
+++ b/arch/powerpc/kernel/entry_32.S
@@ -880,7 +880,18 @@ END_MMU_FTR_SECTION_IFSET(MMU_FTR_TYPE_47x)
          */
         andi.   r10,r9,MSR_EE
         beq     1f
+        /*
+         * Since the ftrace irqsoff latency trace checks CALLER_ADDR1,
+         * which is the stack frame here, we need to force a stack frame
+         * in case we came from user space.
+         */
+        stwu    r1,-32(r1)
+        mflr    r0
+        stw     r0,4(r1)
+        stwu    r1,-32(r1)
         bl      trace_hardirqs_on
+        lwz     r1,0(r1)
+        lwz     r1,0(r1)
         lwz     r9,_MSR(r1)
 1:
 #endif /* CONFIG_TRACE_IRQFLAGS */
diff --git a/arch/powerpc/kernel/machine_kexec.c b/arch/powerpc/kernel/machine_kexec.c
index df7e20c191cd..49a170af8145 100644
--- a/arch/powerpc/kernel/machine_kexec.c
+++ b/arch/powerpc/kernel/machine_kexec.c
@@ -15,6 +15,7 @@
 #include <linux/memblock.h>
 #include <linux/of.h>
 #include <linux/irq.h>
+#include <linux/ftrace.h>
 
 #include <asm/machdep.h>
 #include <asm/prom.h>
@@ -44,10 +45,7 @@ void machine_kexec_mask_interrupts(void) {
 
 void machine_crash_shutdown(struct pt_regs *regs)
 {
-        if (ppc_md.machine_crash_shutdown)
-                ppc_md.machine_crash_shutdown(regs);
-        else
-                default_machine_crash_shutdown(regs);
+        default_machine_crash_shutdown(regs);
 }
 
 /*
@@ -65,8 +63,6 @@ int machine_kexec_prepare(struct kimage *image)
 
 void machine_kexec_cleanup(struct kimage *image)
 {
-        if (ppc_md.machine_kexec_cleanup)
-                ppc_md.machine_kexec_cleanup(image);
 }
 
 void arch_crash_save_vmcoreinfo(void)
@@ -87,10 +83,13 @@ void arch_crash_save_vmcoreinfo(void)
  */
 void machine_kexec(struct kimage *image)
 {
-        if (ppc_md.machine_kexec)
-                ppc_md.machine_kexec(image);
-        else
-                default_machine_kexec(image);
+        int save_ftrace_enabled;
+
+        save_ftrace_enabled = __ftrace_enabled_save();
+
+        default_machine_kexec(image);
+
+        __ftrace_enabled_restore(save_ftrace_enabled);
 
         /* Fall back to normal restart if we're still alive. */
         machine_restart(NULL);
diff --git a/arch/powerpc/kernel/perf_event.c b/arch/powerpc/kernel/perf_event.c
index 567480705789..ab6f6beadb57 100644
--- a/arch/powerpc/kernel/perf_event.c
+++ b/arch/powerpc/kernel/perf_event.c
@@ -1212,6 +1212,7 @@ static void record_and_restart(struct perf_event *event, unsigned long val,
                         if (left <= 0)
                                 left = period;
                         record = 1;
+                        event->hw.last_period = event->hw.sample_period;
                 }
                 if (left < 0x80000000LL)
                         val = 0x80000000LL - left;
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 84906d3fc860..7a1d5cb76932 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -631,7 +631,7 @@ void show_regs(struct pt_regs * regs)
 #ifdef CONFIG_PPC_ADV_DEBUG_REGS
                 printk("DEAR: "REG", ESR: "REG"\n", regs->dar, regs->dsisr);
 #else
-                printk("DAR: "REG", DSISR: "REG"\n", regs->dar, regs->dsisr);
+                printk("DAR: "REG", DSISR: %08lx\n", regs->dar, regs->dsisr);
 #endif
         printk("TASK = %p[%d] '%s' THREAD: %p",
                current, task_pid_nr(current), current->comm, task_thread_info(current));
diff --git a/arch/powerpc/kernel/rtas_flash.c b/arch/powerpc/kernel/rtas_flash.c
index 2b442e6c21e6..bf5f5ce3a7bd 100644
--- a/arch/powerpc/kernel/rtas_flash.c
+++ b/arch/powerpc/kernel/rtas_flash.c
@@ -256,31 +256,16 @@ static ssize_t rtas_flash_read(struct file *file, char __user *buf,
         struct proc_dir_entry *dp = PDE(file->f_path.dentry->d_inode);
         struct rtas_update_flash_t *uf;
         char msg[RTAS_MSG_MAXLEN];
-        int msglen;
 
-        uf = (struct rtas_update_flash_t *) dp->data;
+        uf = dp->data;
 
         if (!strcmp(dp->name, FIRMWARE_FLASH_NAME)) {
                 get_flash_status_msg(uf->status, msg);
         } else {           /* FIRMWARE_UPDATE_NAME */
                 sprintf(msg, "%d\n", uf->status);
         }
-        msglen = strlen(msg);
-        if (msglen > count)
-                msglen = count;
-
-        if (ppos && *ppos != 0)
-                return 0;       /* be cheap */
-
-        if (!access_ok(VERIFY_WRITE, buf, msglen))
-                return -EINVAL;
 
-        if (copy_to_user(buf, msg, msglen))
-                return -EFAULT;
-
-        if (ppos)
-                *ppos = msglen;
-        return msglen;
+        return simple_read_from_buffer(buf, count, ppos, msg, strlen(msg));
 }
 
 /* constructor for flash_block_cache */
@@ -394,26 +379,13 @@ static ssize_t manage_flash_read(struct file *file, char __user *buf,
         char msg[RTAS_MSG_MAXLEN];
         int msglen;
 
-        args_buf = (struct rtas_manage_flash_t *) dp->data;
+        args_buf = dp->data;
         if (args_buf == NULL)
                 return 0;
 
         msglen = sprintf(msg, "%d\n", args_buf->status);
-        if (msglen > count)
-                msglen = count;
 
-        if (ppos && *ppos != 0)
-                return 0;       /* be cheap */
-
-        if (!access_ok(VERIFY_WRITE, buf, msglen))
-                return -EINVAL;
-
-        if (copy_to_user(buf, msg, msglen))
-                return -EFAULT;
-
-        if (ppos)
-                *ppos = msglen;
-        return msglen;
+        return simple_read_from_buffer(buf, count, ppos, msg, msglen);
 }
 
 static ssize_t manage_flash_write(struct file *file, const char __user *buf,
@@ -495,24 +467,11 @@ static ssize_t validate_flash_read(struct file *file, char __user *buf,
         char msg[RTAS_MSG_MAXLEN];
         int msglen;
 
-        args_buf = (struct rtas_validate_flash_t *) dp->data;
+        args_buf = dp->data;
 
-        if (ppos && *ppos != 0)
-                return 0;       /* be cheap */
-        
         msglen = get_validate_flash_msg(args_buf, msg);
-        if (msglen > count)
-                msglen = count;
-
-        if (!access_ok(VERIFY_WRITE, buf, msglen))
-                return -EINVAL;
-
-        if (copy_to_user(buf, msg, msglen))
-                return -EFAULT;
 
-        if (ppos)
-                *ppos = msglen;
-        return msglen;
+        return simple_read_from_buffer(buf, count, ppos, msg, msglen);
 }
 
 static ssize_t validate_flash_write(struct file *file, const char __user *buf,
diff --git a/arch/powerpc/kernel/rtasd.c b/arch/powerpc/kernel/rtasd.c
index 0438f819fe6b..049dbecb5dbc 100644
--- a/arch/powerpc/kernel/rtasd.c
+++ b/arch/powerpc/kernel/rtasd.c
@@ -160,7 +160,7 @@ static int log_rtas_len(char * buf)
         /* rtas fixed header */
         len = 8;
         err = (struct rtas_error_log *)buf;
-        if (err->extended_log_length) {
+        if (err->extended && err->extended_log_length) {
 
                 /* extended header */
                 len += err->extended_log_length;
diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index 09e4dea4a85a..09d31dbf43f9 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -265,11 +265,26 @@ void accumulate_stolen_time(void)
 {
         u64 sst, ust;
 
-        sst = scan_dispatch_log(get_paca()->starttime_user);
-        ust = scan_dispatch_log(get_paca()->starttime);
-        get_paca()->system_time -= sst;
-        get_paca()->user_time -= ust;
-        get_paca()->stolen_time += ust + sst;
+        u8 save_soft_enabled = local_paca->soft_enabled;
+        u8 save_hard_enabled = local_paca->hard_enabled;
+
+        /* We are called early in the exception entry, before
+         * soft/hard_enabled are sync'ed to the expected state
+         * for the exception. We are hard disabled but the PACA
+         * needs to reflect that so various debug stuff doesn't
+         * complain
+         */
+        local_paca->soft_enabled = 0;
+        local_paca->hard_enabled = 0;
+
+        sst = scan_dispatch_log(local_paca->starttime_user);
+        ust = scan_dispatch_log(local_paca->starttime);
+        local_paca->system_time -= sst;
+        local_paca->user_time -= ust;
+        local_paca->stolen_time += ust + sst;
+
+        local_paca->soft_enabled = save_soft_enabled;
+        local_paca->hard_enabled = save_hard_enabled;
 }
 
 static inline u64 calculate_stolen_time(u64 stop_tb)
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 1b2cdc8eec90..bd74fac169be 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -626,12 +626,6 @@ void machine_check_exception(struct pt_regs *regs)
         if (recover > 0)
                 return;
 
-        if (user_mode(regs)) {
-                regs->msr |= MSR_RI;
-                _exception(SIGBUS, regs, BUS_ADRERR, regs->nip);
-                return;
-        }
-
 #if defined(CONFIG_8xx) && defined(CONFIG_PCI)
         /* the qspan pci read routines can cause machine checks -- Cort
          *
@@ -643,16 +637,12 @@ void machine_check_exception(struct pt_regs *regs)
         return;
 #endif
 
-        if (debugger_fault_handler(regs)) {
-                regs->msr |= MSR_RI;
+        if (debugger_fault_handler(regs))
                 return;
-        }
 
         if (check_io_access(regs))
                 return;
 
-        if (debugger_fault_handler(regs))
-                return;
         die("Machine check", regs, SIGBUS);
 
         /* Must die if the interrupt is not recoverable */