9 files changed, 34 insertions, 15 deletions

diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S
index 4f80cf1ce77b..3e57a00b8cba 100644
--- a/arch/powerpc/kernel/entry_32.S
+++ b/arch/powerpc/kernel/entry_32.S
@@ -1213,7 +1213,7 @@ do_user_signal:			/* r10 contains MSR_KERNEL here */
         stw     r3,_TRAP(r1)
 2:      addi    r3,r1,STACK_FRAME_OVERHEAD
         mr      r4,r9
-        bl      do_signal
+        bl      do_notify_resume
         REST_NVGPRS(r1)
         b       recheck
 
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
index d834425186ae..866462cbe2d8 100644
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S
@@ -751,12 +751,16 @@ user_work:
 
         andi.   r0,r4,_TIF_NEED_RESCHED
         beq     1f
+        li      r5,1
+        TRACE_AND_RESTORE_IRQ(r5);
         bl      .schedule
         b       .ret_from_except_lite
 
 1:      bl      .save_nvgprs
+        li      r5,1
+        TRACE_AND_RESTORE_IRQ(r5);
         addi    r3,r1,STACK_FRAME_OVERHEAD
-        bl      .do_signal
+        bl      .do_notify_resume
         b       .ret_from_except
 
 unrecov_restore:
diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
index d4be7bb3dbdf..15c5a4f6de01 100644
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -774,8 +774,8 @@ alignment_common:
 program_check_common:
         EXCEPTION_PROLOG_COMMON(0x700, PACA_EXGEN)
         bl      .save_nvgprs
+        DISABLE_INTS
         addi    r3,r1,STACK_FRAME_OVERHEAD
-        ENABLE_INTS
         bl      .program_check_exception
         b       .ret_from_except
 
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 701d4aceb4f4..01e2877e8e04 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -118,10 +118,14 @@ static inline notrace void set_soft_enabled(unsigned long enable)
 static inline notrace void decrementer_check_overflow(void)
 {
         u64 now = get_tb_or_rtc();
-        u64 *next_tb = &__get_cpu_var(decrementers_next_tb);
+        u64 *next_tb;
+
+        preempt_disable();
+        next_tb = &__get_cpu_var(decrementers_next_tb);
 
         if (now >= *next_tb)
                 set_dec(1);
+        preempt_enable();
 }
 
 notrace void arch_local_irq_restore(unsigned long en)
diff --git a/arch/powerpc/kernel/perf_event.c b/arch/powerpc/kernel/perf_event.c
index 10a140f82cb8..64483fde95c6 100644
--- a/arch/powerpc/kernel/perf_event.c
+++ b/arch/powerpc/kernel/perf_event.c
@@ -865,6 +865,7 @@ static void power_pmu_start(struct perf_event *event, int ef_flags)
 {
         unsigned long flags;
         s64 left;
+        unsigned long val;
 
         if (!event->hw.idx || !event->hw.sample_period)
                 return;
@@ -880,7 +881,12 @@ static void power_pmu_start(struct perf_event *event, int ef_flags)
 
         event->hw.state = 0;
         left = local64_read(&event->hw.period_left);
-        write_pmc(event->hw.idx, left);
+
+        val = 0;
+        if (left < 0x80000000L)
+                val = 0x80000000L - left;
+
+        write_pmc(event->hw.idx, val);
 
         perf_event_update_userpage(event);
         perf_pmu_enable(event->pmu);
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index ebe5766781aa..d817ab018486 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -566,12 +566,12 @@ static void show_instructions(struct pt_regs *regs)
                  */
                 if (!__kernel_text_address(pc) ||
                      __get_user(instr, (unsigned int __user *)pc)) {
-                        printk("XXXXXXXX ");
+                        printk(KERN_CONT "XXXXXXXX ");
                 } else {
                         if (regs->nip == pc)
-                                printk("<%08x> ", instr);
+                                printk(KERN_CONT "<%08x> ", instr);
                         else
-                                printk("%08x ", instr);
+                                printk(KERN_CONT "%08x ", instr);
                 }
 
                 pc += sizeof(int);
diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
index 517b1d8f455b..9f843cdfee9e 100644
--- a/arch/powerpc/kernel/rtas.c
+++ b/arch/powerpc/kernel/rtas.c
@@ -716,7 +716,6 @@ static int __rtas_suspend_last_cpu(struct rtas_suspend_me_data *data, int wake_w
         int cpu;
 
         slb_set_size(SLB_MIN_SIZE);
-        stop_topology_update();
         printk(KERN_DEBUG "calling ibm,suspend-me on cpu %i\n", smp_processor_id());
 
         while (rc == H_MULTI_THREADS_ACTIVE && !atomic_read(&data->done) &&
@@ -732,7 +731,6 @@ static int __rtas_suspend_last_cpu(struct rtas_suspend_me_data *data, int wake_w
                 rc = atomic_read(&data->error);
 
         atomic_set(&data->error, rc);
-        start_topology_update();
         pSeries_coalesce_init();
 
         if (wake_when_done) {
@@ -846,6 +844,7 @@ int rtas_ibm_suspend_me(struct rtas_args *args)
         atomic_set(&data.error, 0);
         data.token = rtas_token("ibm,suspend-me");
         data.complete = &done;
+        stop_topology_update();
 
         /* Call function on all CPUs.  One of us will make the
          * rtas call
@@ -858,6 +857,8 @@ int rtas_ibm_suspend_me(struct rtas_args *args)
         if (atomic_read(&data.error) != 0)
                 printk(KERN_ERR "Error doing global join\n");
 
+        start_topology_update();
+
         return atomic_read(&data.error);
 }
 #else /* CONFIG_PPC_PSERIES */
diff --git a/arch/powerpc/kernel/signal.c b/arch/powerpc/kernel/signal.c
index 2300426e531a..ac6e437b1021 100644
--- a/arch/powerpc/kernel/signal.c
+++ b/arch/powerpc/kernel/signal.c
@@ -11,6 +11,7 @@
 
 #include <linux/tracehook.h>
 #include <linux/signal.h>
+#include <linux/key.h>
 #include <asm/hw_breakpoint.h>
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
@@ -113,8 +114,9 @@ static void check_syscall_restart(struct pt_regs *regs, struct k_sigaction *ka,
         }
 }
 
-static int do_signal_pending(sigset_t *oldset, struct pt_regs *regs)
+static int do_signal(struct pt_regs *regs)
 {
+        sigset_t *oldset;
         siginfo_t info;
         int signr;
         struct k_sigaction ka;
@@ -123,7 +125,7 @@ static int do_signal_pending(sigset_t *oldset, struct pt_regs *regs)
 
         if (current_thread_info()->local_flags & _TLF_RESTORE_SIGMASK)
                 oldset = &current->saved_sigmask;
-        else if (!oldset)
+        else
                 oldset = &current->blocked;
 
         signr = get_signal_to_deliver(&info, &ka, regs, NULL);
@@ -191,14 +193,16 @@ static int do_signal_pending(sigset_t *oldset, struct pt_regs *regs)
         return ret;
 }
 
-void do_signal(struct pt_regs *regs, unsigned long thread_info_flags)
+void do_notify_resume(struct pt_regs *regs, unsigned long thread_info_flags)
 {
         if (thread_info_flags & _TIF_SIGPENDING)
-                do_signal_pending(NULL, regs);
+                do_signal(regs);
 
         if (thread_info_flags & _TIF_NOTIFY_RESUME) {
                 clear_thread_flag(TIF_NOTIFY_RESUME);
                 tracehook_notify_resume(regs);
+                if (current->replacement_session_keyring)
+                        key_replace_session_keyring();
         }
 }
 
diff --git a/arch/powerpc/kernel/signal.h b/arch/powerpc/kernel/signal.h
index 6c0ddfc0603e..8dde973aaaf5 100644
--- a/arch/powerpc/kernel/signal.h
+++ b/arch/powerpc/kernel/signal.h
@@ -12,7 +12,7 @@
 
 #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
 
-extern void do_signal(struct pt_regs *regs, unsigned long thread_info_flags);
+extern void do_notify_resume(struct pt_regs *regs, unsigned long thread_info_flags);
 
 extern void __user * get_sigframe(struct k_sigaction *ka, struct pt_regs *regs,
                                   size_t frame_size, int is_32);