12 files changed, 61 insertions, 29 deletions

diff --git a/MAINTAINERS b/MAINTAINERS
index 502f2dd761eb..b12b8c13f53a 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -7007,6 +7007,13 @@ T:	git git://git.kernel.org/pub/scm/linux/kernel/git/mjg59/platform-drivers-x86.
 S:      Maintained
 F:      drivers/platform/x86
 
+X86 MCE INFRASTRUCTURE
+M:      Tony Luck <tony.luck@intel.com>
+M:      Borislav Petkov <bp@amd64.org>
+L:      linux-edac@vger.kernel.org
+S:      Maintained
+F:      arch/x86/kernel/cpu/mcheck/*
+
 XEN HYPERVISOR INTERFACE
 M:      Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
 M:      Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
diff --git a/arch/x86/include/asm/memblock.h b/arch/x86/include/asm/memblock.h
index 19ae14ba6978..0cd3800f33b9 100644
--- a/arch/x86/include/asm/memblock.h
+++ b/arch/x86/include/asm/memblock.h
@@ -4,7 +4,6 @@
 #define ARCH_DISCARD_MEMBLOCK
 
 u64 memblock_x86_find_in_range_size(u64 start, u64 *sizep, u64 align);
-void memblock_x86_to_bootmem(u64 start, u64 end);
 
 void memblock_x86_reserve_range(u64 start, u64 end, char *name);
 void memblock_x86_free_range(u64 start, u64 end);
@@ -19,5 +18,6 @@ u64 memblock_x86_hole_size(u64 start, u64 end);
 u64 memblock_x86_find_in_range_node(int nid, u64 start, u64 end, u64 size, u64 align);
 u64 memblock_x86_free_memory_in_range(u64 addr, u64 limit);
 u64 memblock_x86_memory_in_range(u64 addr, u64 limit);
+bool memblock_x86_check_reserved_size(u64 *addrp, u64 *sizep, u64 align);
 
 #endif
diff --git a/arch/x86/mm/memblock.c b/arch/x86/mm/memblock.c
index aa1169392b83..992da5ec5a64 100644
--- a/arch/x86/mm/memblock.c
+++ b/arch/x86/mm/memblock.c
@@ -8,7 +8,7 @@
 #include <linux/range.h>
 
 /* Check for already reserved areas */
-static bool __init check_with_memblock_reserved_size(u64 *addrp, u64 *sizep, u64 align)
+bool __init memblock_x86_check_reserved_size(u64 *addrp, u64 *sizep, u64 align)
 {
         struct memblock_region *r;
         u64 addr = *addrp, last;
@@ -59,7 +59,7 @@ u64 __init memblock_x86_find_in_range_size(u64 start, u64 *sizep, u64 align)
                 if (addr >= ei_last)
                         continue;
                 *sizep = ei_last - addr;
-                while (check_with_memblock_reserved_size(&addr, sizep, align))
+                while (memblock_x86_check_reserved_size(&addr, sizep, align))
                         ;
 
                 if (*sizep)
diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c
index 0d3a4fa34560..474356b98ede 100644
--- a/arch/x86/platform/efi/efi.c
+++ b/arch/x86/platform/efi/efi.c
@@ -310,14 +310,31 @@ void __init efi_reserve_boot_services(void)
 
         for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
                 efi_memory_desc_t *md = p;
-                unsigned long long start = md->phys_addr;
-                unsigned long long size = md->num_pages << EFI_PAGE_SHIFT;
+                u64 start = md->phys_addr;
+                u64 size = md->num_pages << EFI_PAGE_SHIFT;
 
                 if (md->type != EFI_BOOT_SERVICES_CODE &&
                     md->type != EFI_BOOT_SERVICES_DATA)
                         continue;
-
-                memblock_x86_reserve_range(start, start + size, "EFI Boot");
+                /* Only reserve where possible:
+                 * - Not within any already allocated areas
+                 * - Not over any memory area (really needed, if above?)
+                 * - Not within any part of the kernel
+                 * - Not the bios reserved area
+                */
+                if ((start+size >= virt_to_phys(_text)
+                                && start <= virt_to_phys(_end)) ||
+                        !e820_all_mapped(start, start+size, E820_RAM) ||
+                        memblock_x86_check_reserved_size(&start, &size,
+                                                        1<<EFI_PAGE_SHIFT)) {
+                        /* Could not reserve, skip it */
+                        md->num_pages = 0;
+                        memblock_dbg(PFX "Could not reserve boot range "
+                                        "[0x%010llx-0x%010llx]\n",
+                                                start, start+size-1);
+                } else
+                        memblock_x86_reserve_range(start, start+size,
+                                                        "EFI Boot");
         }
 }
 
@@ -334,6 +351,10 @@ static void __init efi_free_boot_services(void)
                     md->type != EFI_BOOT_SERVICES_DATA)
                         continue;
 
+                /* Could not reserve boot area */
+                if (!size)
+                        continue;
+
                 free_bootmem_late(start, size);
         }
 }
diff --git a/fs/timerfd.c b/fs/timerfd.c
index f67acbdda5e8..dffeb3795af1 100644
--- a/fs/timerfd.c
+++ b/fs/timerfd.c
@@ -61,7 +61,9 @@ static enum hrtimer_restart timerfd_tmrproc(struct hrtimer *htmr)
 
 /*
  * Called when the clock was set to cancel the timers in the cancel
- * list.
+ * list. This will wake up processes waiting on these timers. The
+ * wake-up requires ctx->ticks to be non zero, therefore we increment
+ * it before calling wake_up_locked().
  */
 void timerfd_clock_was_set(void)
 {
@@ -76,6 +78,7 @@ void timerfd_clock_was_set(void)
                 spin_lock_irqsave(&ctx->wqh.lock, flags);
                 if (ctx->moffs.tv64 != moffs.tv64) {
                         ctx->moffs.tv64 = KTIME_MAX;
+                        ctx->ticks++;
                         wake_up_locked(&ctx->wqh);
                 }
                 spin_unlock_irqrestore(&ctx->wqh.lock, flags);
diff --git a/include/linux/clocksource.h b/include/linux/clocksource.h
index d4646b48dc4a..18a1baf31f2d 100644
--- a/include/linux/clocksource.h
+++ b/include/linux/clocksource.h
@@ -188,6 +188,7 @@ struct clocksource {
 #ifdef CONFIG_CLOCKSOURCE_WATCHDOG
         /* Watchdog related data, used by the framework */
         struct list_head wd_list;
+        cycle_t cs_last;
         cycle_t wd_last;
 #endif
 } ____cacheline_aligned;
diff --git a/include/linux/smp.h b/include/linux/smp.h
index 7ad824d510a2..8cc38d3bab0c 100644
--- a/include/linux/smp.h
+++ b/include/linux/smp.h
@@ -85,12 +85,15 @@ int smp_call_function_any(const struct cpumask *mask,
  * Generic and arch helpers
  */
 #ifdef CONFIG_USE_GENERIC_SMP_HELPERS
+void __init call_function_init(void);
 void generic_smp_call_function_single_interrupt(void);
 void generic_smp_call_function_interrupt(void);
 void ipi_call_lock(void);
 void ipi_call_unlock(void);
 void ipi_call_lock_irq(void);
 void ipi_call_unlock_irq(void);
+#else
+static inline void call_function_init(void) { }
 #endif
 
 /*
@@ -134,7 +137,7 @@ static inline void smp_send_reschedule(int cpu) { }
 #define smp_prepare_boot_cpu()                  do {} while (0)
 #define smp_call_function_many(mask, func, info, wait) \
                         (up_smp_call_function(func, info))
-static inline void init_call_single_data(void) { }
+static inline void call_function_init(void) { }
 
 static inline int
 smp_call_function_any(const struct cpumask *mask, smp_call_func_t func,
diff --git a/init/main.c b/init/main.c
index cafba67c13bf..d7211faed2ad 100644
--- a/init/main.c
+++ b/init/main.c
@@ -542,6 +542,7 @@ asmlinkage void __init start_kernel(void)
         timekeeping_init();
         time_init();
         profile_init();
+        call_function_init();
         if (!irqs_disabled())
                 printk(KERN_CRIT "start_kernel(): bug: interrupts were "
                                  "enabled early\n");
diff --git a/kernel/smp.c b/kernel/smp.c
index 73a195193558..fb67dfa8394e 100644
--- a/kernel/smp.c
+++ b/kernel/smp.c
@@ -74,7 +74,7 @@ static struct notifier_block __cpuinitdata hotplug_cfd_notifier = {
         .notifier_call          = hotplug_cfd,
 };
 
-static int __cpuinit init_call_single_data(void)
+void __init call_function_init(void)
 {
         void *cpu = (void *)(long)smp_processor_id();
         int i;
@@ -88,10 +88,7 @@ static int __cpuinit init_call_single_data(void)
 
         hotplug_cfd(&hotplug_cfd_notifier, CPU_UP_PREPARE, cpu);
         register_cpu_notifier(&hotplug_cfd_notifier);
-
-        return 0;
 }
-early_initcall(init_call_single_data);
 
 /*
  * csd_lock/csd_unlock used to serialize access to per-cpu csd resources
diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c
index 1c95fd677328..e0980f0d9a0a 100644
--- a/kernel/time/clocksource.c
+++ b/kernel/time/clocksource.c
@@ -185,7 +185,6 @@ static struct clocksource *watchdog;
 static struct timer_list watchdog_timer;
 static DECLARE_WORK(watchdog_work, clocksource_watchdog_work);
 static DEFINE_SPINLOCK(watchdog_lock);
-static cycle_t watchdog_last;
 static int watchdog_running;
 
 static int clocksource_watchdog_kthread(void *data);
@@ -254,11 +253,6 @@ static void clocksource_watchdog(unsigned long data)
         if (!watchdog_running)
                 goto out;
 
-        wdnow = watchdog->read(watchdog);
-        wd_nsec = clocksource_cyc2ns((wdnow - watchdog_last) & watchdog->mask,
-                                     watchdog->mult, watchdog->shift);
-        watchdog_last = wdnow;
-
         list_for_each_entry(cs, &watchdog_list, wd_list) {
 
                 /* Clocksource already marked unstable? */
@@ -268,19 +262,28 @@ static void clocksource_watchdog(unsigned long data)
                         continue;
                 }
 
+                local_irq_disable();
                 csnow = cs->read(cs);
+                wdnow = watchdog->read(watchdog);
+                local_irq_enable();
 
                 /* Clocksource initialized ? */
                 if (!(cs->flags & CLOCK_SOURCE_WATCHDOG)) {
                         cs->flags |= CLOCK_SOURCE_WATCHDOG;
-                        cs->wd_last = csnow;
+                        cs->wd_last = wdnow;
+                        cs->cs_last = csnow;
                         continue;
                 }
 
-                /* Check the deviation from the watchdog clocksource. */
-                cs_nsec = clocksource_cyc2ns((csnow - cs->wd_last) &
+                wd_nsec = clocksource_cyc2ns((wdnow - cs->wd_last) & watchdog->mask,
+                                             watchdog->mult, watchdog->shift);
+
+                cs_nsec = clocksource_cyc2ns((csnow - cs->cs_last) &
                                              cs->mask, cs->mult, cs->shift);
-                cs->wd_last = csnow;
+                cs->cs_last = csnow;
+                cs->wd_last = wdnow;
+
+                /* Check the deviation from the watchdog clocksource. */
                 if (abs(cs_nsec - wd_nsec) > WATCHDOG_THRESHOLD) {
                         clocksource_unstable(cs, cs_nsec - wd_nsec);
                         continue;
@@ -318,7 +321,6 @@ static inline void clocksource_start_watchdog(void)
                 return;
         init_timer(&watchdog_timer);
         watchdog_timer.function = clocksource_watchdog;
-        watchdog_last = watchdog->read(watchdog);
         watchdog_timer.expires = jiffies + WATCHDOG_INTERVAL;
         add_timer_on(&watchdog_timer, cpumask_first(cpu_online_mask));
         watchdog_running = 1;
diff --git a/kernel/trace/trace_printk.c b/kernel/trace/trace_printk.c
index dff763b7baf1..1f06468a10d7 100644
--- a/kernel/trace/trace_printk.c
+++ b/kernel/trace/trace_printk.c
@@ -240,13 +240,10 @@ static const char **find_next(void *v, loff_t *pos)
         const char **fmt = v;
         int start_index;
 
-        if (!fmt)
-                fmt = __start___trace_bprintk_fmt + *pos;
-
         start_index = __stop___trace_bprintk_fmt - __start___trace_bprintk_fmt;
 
         if (*pos < start_index)
-                return fmt;
+                return __start___trace_bprintk_fmt + *pos;
 
         return find_next_mod_format(start_index, v, fmt, pos);
 }
diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 032ba6398a5c..940257b5774e 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -633,7 +633,7 @@ prefix_SQ = $(subst ','\'',$(prefix))
 
 SHELL_PATH_SQ = $(subst ','\'',$(SHELL_PATH))
 
-LIBS = -Wl,--whole-archive $(PERFLIBS) -Wl,--no-whole-archive $(EXTLIBS)
+LIBS = -Wl,--whole-archive $(PERFLIBS) -Wl,--no-whole-archive -Wl,--start-group $(EXTLIBS) -Wl,--end-group
 
 ALL_CFLAGS += $(BASIC_CFLAGS)
 ALL_CFLAGS += $(ARCH_CFLAGS)