Merge branch 'perf/urgent' into perf/core

Merge reason: We want to queue up a dependent patch. Also update to
              later -rc's.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

5 files changed, 36 insertions, 15 deletions

diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S
index 678f98cd5e6..3ef743fa5d7 100644
--- a/arch/powerpc/kernel/head_8xx.S
+++ b/arch/powerpc/kernel/head_8xx.S
@@ -542,11 +542,11 @@ DARFixed:/* Return from dcbx instruction bug workaround, r10 holds value of DAR
 FixupDAR:/* Entry point for dcbx workaround. */
         /* fetch instruction from memory. */
         mfspr   r10, SPRN_SRR0
+        andis.  r11, r10, 0x8000        /* Address >= 0x80000000 */
         DO_8xx_CPU6(0x3780, r3)
         mtspr   SPRN_MD_EPN, r10
         mfspr   r11, SPRN_M_TWB /* Get level 1 table entry address */
-        cmplwi  cr0, r11, 0x0800
-        blt-    3f              /* Branch if user space */
+        beq-    3f              /* Branch if user space */
         lis     r11, (swapper_pg_dir-PAGE_OFFSET)@h
         ori     r11, r11, (swapper_pg_dir-PAGE_OFFSET)@l
         rlwimi  r11, r10, 32-20, 0xffc /* r11 = r11&~0xffc|(r10>>20)&0xffc */
@@ -768,12 +768,12 @@ start_here:
  */
 initial_mmu:
         tlbia                   /* Invalidate all TLB entries */
-#ifdef CONFIG_PIN_TLB
+/* Always pin the first 8 MB ITLB to prevent ITLB
+   misses while mucking around with SRR0/SRR1 in asm
+*/
         lis     r8, MI_RSV4I@h
         ori     r8, r8, 0x1c00
-#else
-        li      r8, 0
-#endif
+
         mtspr   SPRN_MI_CTR, r8 /* Set instruction MMU control */
 
 #ifdef CONFIG_PIN_TLB
diff --git a/arch/powerpc/kernel/rtas-proc.c b/arch/powerpc/kernel/rtas-proc.c
index 1be9fe38bcb..8777fb02349 100644
--- a/arch/powerpc/kernel/rtas-proc.c
+++ b/arch/powerpc/kernel/rtas-proc.c
@@ -262,19 +262,19 @@ static int __init proc_rtas_init(void)
         if (rtas_node == NULL)
                 return -ENODEV;
 
-        proc_create("ppc64/rtas/progress", S_IRUGO|S_IWUSR, NULL,
+        proc_create("powerpc/rtas/progress", S_IRUGO|S_IWUSR, NULL,
                     &ppc_rtas_progress_operations);
-        proc_create("ppc64/rtas/clock", S_IRUGO|S_IWUSR, NULL,
+        proc_create("powerpc/rtas/clock", S_IRUGO|S_IWUSR, NULL,
                     &ppc_rtas_clock_operations);
-        proc_create("ppc64/rtas/poweron", S_IWUSR|S_IRUGO, NULL,
+        proc_create("powerpc/rtas/poweron", S_IWUSR|S_IRUGO, NULL,
                     &ppc_rtas_poweron_operations);
-        proc_create("ppc64/rtas/sensors", S_IRUGO, NULL,
+        proc_create("powerpc/rtas/sensors", S_IRUGO, NULL,
                     &ppc_rtas_sensors_operations);
-        proc_create("ppc64/rtas/frequency", S_IWUSR|S_IRUGO, NULL,
+        proc_create("powerpc/rtas/frequency", S_IWUSR|S_IRUGO, NULL,
                     &ppc_rtas_tone_freq_operations);
-        proc_create("ppc64/rtas/volume", S_IWUSR|S_IRUGO, NULL,
+        proc_create("powerpc/rtas/volume", S_IWUSR|S_IRUGO, NULL,
                     &ppc_rtas_tone_volume_operations);
-        proc_create("ppc64/rtas/rmo_buffer", S_IRUSR, NULL,
+        proc_create("powerpc/rtas/rmo_buffer", S_IRUSR, NULL,
                     &ppc_rtas_rmo_buf_ops);
         return 0;
 }
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index a521fb8a40e..c2ee1449807 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -619,4 +619,16 @@ void __cpu_die(unsigned int cpu)
         if (smp_ops->cpu_die)
                 smp_ops->cpu_die(cpu);
 }
+
+static DEFINE_MUTEX(powerpc_cpu_hotplug_driver_mutex);
+
+void cpu_hotplug_driver_lock()
+{
+        mutex_lock(&powerpc_cpu_hotplug_driver_mutex);
+}
+
+void cpu_hotplug_driver_unlock()
+{
+        mutex_unlock(&powerpc_cpu_hotplug_driver_mutex);
+}
 #endif
diff --git a/arch/powerpc/kernel/swsusp_32.S b/arch/powerpc/kernel/swsusp_32.S
index b47d8ceffb5..b0754e23743 100644
--- a/arch/powerpc/kernel/swsusp_32.S
+++ b/arch/powerpc/kernel/swsusp_32.S
@@ -303,7 +303,7 @@ END_MMU_FTR_SECTION_IFSET(MMU_FTR_USE_HIGH_BATS)
         lis     r4,0x1000
 1:      addic.  r4,r4,-0x1000
         tlbie   r4
-        blt     1b
+        bgt     1b
         sync
 
         /* restore the MSR and turn on the MMU */
diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index 9ba2cc88591..6c6093d67f3 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -903,12 +903,21 @@ static void decrementer_set_mode(enum clock_event_mode mode,
                 decrementer_set_next_event(DECREMENTER_MAX, dev);
 }
 
+static inline uint64_t div_sc64(unsigned long ticks, unsigned long nsec,
+                                int shift)
+{
+        uint64_t tmp = ((uint64_t)ticks) << shift;
+
+        do_div(tmp, nsec);
+        return tmp;
+}
+
 static void __init setup_clockevent_multiplier(unsigned long hz)
 {
         u64 mult, shift = 32;
 
         while (1) {
-                mult = div_sc(hz, NSEC_PER_SEC, shift);
+                mult = div_sc64(hz, NSEC_PER_SEC, shift);
                 if (mult && (mult >> 32UL) == 0UL)
                         break;