Merge branch 'mpi-master' into wip-k-fmlpwip-k-fmlp

Conflicts:
	litmus/sched_cedf.c

1 files changed, 241 insertions, 111 deletions

diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 716f99b682c1..e0786e35f247 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -2,8 +2,8 @@
  * Performance events:
  *
  *    Copyright (C) 2008-2009, Thomas Gleixner <tglx@linutronix.de>
- *    Copyright (C) 2008-2009, Red Hat, Inc., Ingo Molnar
- *    Copyright (C) 2008-2009, Red Hat, Inc., Peter Zijlstra
+ *    Copyright (C) 2008-2011, Red Hat, Inc., Ingo Molnar
+ *    Copyright (C) 2008-2011, Red Hat, Inc., Peter Zijlstra
  *
  * Data type definitions, declarations, prototypes.
  *
@@ -52,6 +52,8 @@ enum perf_hw_id {
         PERF_COUNT_HW_BRANCH_INSTRUCTIONS       = 4,
         PERF_COUNT_HW_BRANCH_MISSES             = 5,
         PERF_COUNT_HW_BUS_CYCLES                = 6,
+        PERF_COUNT_HW_STALLED_CYCLES_FRONTEND   = 7,
+        PERF_COUNT_HW_STALLED_CYCLES_BACKEND    = 8,
 
         PERF_COUNT_HW_MAX,                      /* non-ABI */
 };
@@ -135,14 +137,14 @@ enum perf_event_sample_format {
  *
  * struct read_format {
  *      { u64           value;
- *        { u64         time_enabled; } && PERF_FORMAT_ENABLED
- *        { u64         time_running; } && PERF_FORMAT_RUNNING
+ *        { u64         time_enabled; } && PERF_FORMAT_TOTAL_TIME_ENABLED
+ *        { u64         time_running; } && PERF_FORMAT_TOTAL_TIME_RUNNING
  *        { u64         id;           } && PERF_FORMAT_ID
  *      } && !PERF_FORMAT_GROUP
  *
  *      { u64           nr;
- *        { u64         time_enabled; } && PERF_FORMAT_ENABLED
- *        { u64         time_running; } && PERF_FORMAT_RUNNING
+ *        { u64         time_enabled; } && PERF_FORMAT_TOTAL_TIME_ENABLED
+ *        { u64         time_running; } && PERF_FORMAT_TOTAL_TIME_RUNNING
  *        { u64         value;
  *          { u64       id;           } && PERF_FORMAT_ID
  *        }             cntr[nr];
@@ -215,8 +217,9 @@ struct perf_event_attr {
                                  */
                                 precise_ip     :  2, /* skid constraint       */
                                 mmap_data      :  1, /* non-exec mmap data    */
+                                sample_id_all  :  1, /* sample_type all events */
 
-                                __reserved_1   : 46;
+                                __reserved_1   : 45;
 
         union {
                 __u32           wakeup_events;    /* wakeup every n events */
@@ -224,8 +227,14 @@ struct perf_event_attr {
         };
 
         __u32                   bp_type;
-        __u64                   bp_addr;
-        __u64                   bp_len;
+        union {
+                __u64           bp_addr;
+                __u64           config1; /* extension of config */
+        };
+        union {
+                __u64           bp_len;
+                __u64           config2; /* extension of config1 */
+        };
 };
 
 /*
@@ -327,6 +336,15 @@ struct perf_event_header {
 enum perf_event_type {
 
         /*
+         * If perf_event_attr.sample_id_all is set then all event types will
+         * have the sample_type selected fields related to where/when
+         * (identity) an event took place (TID, TIME, ID, CPU, STREAM_ID)
+         * described in PERF_RECORD_SAMPLE below, it will be stashed just after
+         * the perf_event_header and the fields already present for the existing
+         * fields, i.e. at the end of the payload. That way a newer perf.data
+         * file will be supported by older perf tools, with these new optional
+         * fields being ignored.
+         *
          * The MMAP events record the PROT_EXEC mappings so that we can
          * correlate userspace IPs to code. They have the following structure:
          *
@@ -452,8 +470,9 @@ enum perf_callchain_context {
         PERF_CONTEXT_MAX                = (__u64)-4095,
 };
 
-#define PERF_FLAG_FD_NO_GROUP   (1U << 0)
-#define PERF_FLAG_FD_OUTPUT     (1U << 1)
+#define PERF_FLAG_FD_NO_GROUP           (1U << 0)
+#define PERF_FLAG_FD_OUTPUT             (1U << 1)
+#define PERF_FLAG_PID_CGROUP            (1U << 2) /* pid=cgroup id, per-cpu mode only */
 
 #ifdef __KERNEL__
 /*
@@ -461,14 +480,15 @@ enum perf_callchain_context {
  */
 
 #ifdef CONFIG_PERF_EVENTS
+# include <linux/cgroup.h>
 # include <asm/perf_event.h>
 # include <asm/local64.h>
 #endif
 
 struct perf_guest_info_callbacks {
-        int (*is_in_guest) (void);
-        int (*is_user_mode) (void);
-        unsigned long (*get_guest_ip) (void);
+        int                             (*is_in_guest)(void);
+        int                             (*is_user_mode)(void);
+        unsigned long                   (*get_guest_ip)(void);
 };
 
 #ifdef CONFIG_HAVE_HW_BREAKPOINT
@@ -486,6 +506,8 @@ struct perf_guest_info_callbacks {
 #include <linux/workqueue.h>
 #include <linux/ftrace.h>
 #include <linux/cpu.h>
+#include <linux/irq_work.h>
+#include <linux/jump_label.h>
 #include <asm/atomic.h>
 #include <asm/local.h>
 
@@ -527,18 +549,27 @@ struct hw_perf_event {
                         unsigned long   event_base;
                         int             idx;
                         int             last_cpu;
+                        unsigned int    extra_reg;
+                        u64             extra_config;
+                        int             extra_alloc;
                 };
                 struct { /* software */
-                        s64             remaining;
                         struct hrtimer  hrtimer;
                 };
 #ifdef CONFIG_HAVE_HW_BREAKPOINT
                 struct { /* breakpoint */
                         struct arch_hw_breakpoint       info;
                         struct list_head                bp_list;
+                        /*
+                         * Crufty hack to avoid the chicken and egg
+                         * problem hw_breakpoint has with context
+                         * creation and event initalization.
+                         */
+                        struct task_struct              *bp_target;
                 };
 #endif
         };
+        int                             state;
         local64_t                       prev_count;
         u64                             sample_period;
         u64                             last_period;
@@ -550,6 +581,13 @@ struct hw_perf_event {
 #endif
 };
 
+/*
+ * hw_perf_event::state flags
+ */
+#define PERF_HES_STOPPED        0x01 /* the counter is stopped */
+#define PERF_HES_UPTODATE       0x02 /* event->count up-to-date */
+#define PERF_HES_ARCH           0x04
+
 struct perf_event;
 
 /*
@@ -561,36 +599,74 @@ struct perf_event;
  * struct pmu - generic performance monitoring unit
  */
 struct pmu {
-        int (*enable)                   (struct perf_event *event);
-        void (*disable)                 (struct perf_event *event);
-        int (*start)                    (struct perf_event *event);
-        void (*stop)                    (struct perf_event *event);
-        void (*read)                    (struct perf_event *event);
-        void (*unthrottle)              (struct perf_event *event);
+        struct list_head                entry;
+
+        struct device                   *dev;
+        char                            *name;
+        int                             type;
+
+        int * __percpu                  pmu_disable_count;
+        struct perf_cpu_context * __percpu pmu_cpu_context;
+        int                             task_ctx_nr;
+
+        /*
+         * Fully disable/enable this PMU, can be used to protect from the PMI
+         * as well as for lazy/batch writing of the MSRs.
+         */
+        void (*pmu_enable)              (struct pmu *pmu); /* optional */
+        void (*pmu_disable)             (struct pmu *pmu); /* optional */
+
+        /*
+         * Try and initialize the event for this PMU.
+         * Should return -ENOENT when the @event doesn't match this PMU.
+         */
+        int (*event_init)               (struct perf_event *event);
+
+#define PERF_EF_START   0x01            /* start the counter when adding    */
+#define PERF_EF_RELOAD  0x02            /* reload the counter when starting */
+#define PERF_EF_UPDATE  0x04            /* update the counter when stopping */
+
+        /*
+         * Adds/Removes a counter to/from the PMU, can be done inside
+         * a transaction, see the ->*_txn() methods.
+         */
+        int  (*add)                     (struct perf_event *event, int flags);
+        void (*del)                     (struct perf_event *event, int flags);
+
+        /*
+         * Starts/Stops a counter present on the PMU. The PMI handler
+         * should stop the counter when perf_event_overflow() returns
+         * !0. ->start() will be used to continue.
+         */
+        void (*start)                   (struct perf_event *event, int flags);
+        void (*stop)                    (struct perf_event *event, int flags);
 
         /*
-         * Group events scheduling is treated as a transaction, add group
-         * events as a whole and perform one schedulability test. If the test
-         * fails, roll back the whole group
+         * Updates the counter value of the event.
          */
+        void (*read)                    (struct perf_event *event);
 
         /*
-         * Start the transaction, after this ->enable() doesn't need
-         * to do schedulability tests.
+         * Group events scheduling is treated as a transaction, add
+         * group events as a whole and perform one schedulability test.
+         * If the test fails, roll back the whole group
+         *
+         * Start the transaction, after this ->add() doesn't need to
+         * do schedulability tests.
          */
-        void (*start_txn)       (const struct pmu *pmu);
+        void (*start_txn)               (struct pmu *pmu); /* optional */
         /*
-         * If ->start_txn() disabled the ->enable() schedulability test
+         * If ->start_txn() disabled the ->add() schedulability test
          * then ->commit_txn() is required to perform one. On success
          * the transaction is closed. On error the transaction is kept
          * open until ->cancel_txn() is called.
          */
-        int  (*commit_txn)      (const struct pmu *pmu);
+        int  (*commit_txn)              (struct pmu *pmu); /* optional */
         /*
-         * Will cancel the transaction, assumes ->disable() is called for
-         * each successfull ->enable() during the transaction.
+         * Will cancel the transaction, assumes ->del() is called
+         * for each successful ->add() during the transaction.
          */
-        void (*cancel_txn)      (const struct pmu *pmu);
+        void (*cancel_txn)              (struct pmu *pmu); /* optional */
 };
 
 /**
@@ -631,11 +707,6 @@ struct perf_buffer {
         void                            *data_pages[0];
 };
 
-struct perf_pending_entry {
-        struct perf_pending_entry *next;
-        void (*func)(struct perf_pending_entry *);
-};
-
 struct perf_sample_data;
 
 typedef void (*perf_overflow_handler_t)(struct perf_event *, int,
@@ -643,19 +714,36 @@ typedef void (*perf_overflow_handler_t)(struct perf_event *, int,
                                         struct pt_regs *regs);
 
 enum perf_group_flag {
-        PERF_GROUP_SOFTWARE = 0x1,
+        PERF_GROUP_SOFTWARE             = 0x1,
 };
 
-#define SWEVENT_HLIST_BITS      8
-#define SWEVENT_HLIST_SIZE      (1 << SWEVENT_HLIST_BITS)
+#define SWEVENT_HLIST_BITS              8
+#define SWEVENT_HLIST_SIZE              (1 << SWEVENT_HLIST_BITS)
 
 struct swevent_hlist {
-        struct hlist_head       heads[SWEVENT_HLIST_SIZE];
-        struct rcu_head         rcu_head;
+        struct hlist_head               heads[SWEVENT_HLIST_SIZE];
+        struct rcu_head                 rcu_head;
 };
 
 #define PERF_ATTACH_CONTEXT     0x01
 #define PERF_ATTACH_GROUP       0x02
+#define PERF_ATTACH_TASK        0x04
+
+#ifdef CONFIG_CGROUP_PERF
+/*
+ * perf_cgroup_info keeps track of time_enabled for a cgroup.
+ * This is a per-cpu dynamically allocated data structure.
+ */
+struct perf_cgroup_info {
+        u64                             time;
+        u64                             timestamp;
+};
+
+struct perf_cgroup {
+        struct                          cgroup_subsys_state css;
+        struct                          perf_cgroup_info *info; /* timing info, one per cpu */
+};
+#endif
 
 /**
  * struct perf_event - performance event kernel representation:
@@ -669,7 +757,7 @@ struct perf_event {
         int                             nr_siblings;
         int                             group_flags;
         struct perf_event               *group_leader;
-        const struct pmu                *pmu;
+        struct pmu                      *pmu;
 
         enum perf_event_active_state    state;
         unsigned int                    attach_state;
@@ -702,7 +790,20 @@ struct perf_event {
         u64                             tstamp_running;
         u64                             tstamp_stopped;
 
+        /*
+         * timestamp shadows the actual context timing but it can
+         * be safely used in NMI interrupt context. It reflects the
+         * context time as it was when the event was last scheduled in.
+         *
+         * ctx_time already accounts for ctx->timestamp. Therefore to
+         * compute ctx_time for a sample, simply add perf_clock().
+         */
+        u64                             shadow_ctx_time;
+
         struct perf_event_attr          attr;
+        u16                             header_size;
+        u16                             id_header_size;
+        u16                             read_size;
         struct hw_perf_event            hw;
 
         struct perf_event_context       *ctx;
@@ -743,7 +844,7 @@ struct perf_event {
         int                             pending_wakeup;
         int                             pending_kill;
         int                             pending_disable;
-        struct perf_pending_entry       pending;
+        struct irq_work                 pending;
 
         atomic_t                        event_limit;
 
@@ -760,15 +861,27 @@ struct perf_event {
         struct event_filter             *filter;
 #endif
 
+#ifdef CONFIG_CGROUP_PERF
+        struct perf_cgroup              *cgrp; /* cgroup event is attach to */
+        int                             cgrp_defer_enabled;
+#endif
+
 #endif /* CONFIG_PERF_EVENTS */
 };
 
+enum perf_event_context_type {
+        task_context,
+        cpu_context,
+};
+
 /**
  * struct perf_event_context - event context structure
  *
  * Used as a container for task events and CPU events as well:
  */
 struct perf_event_context {
+        struct pmu                      *pmu;
+        enum perf_event_context_type    type;
         /*
          * Protect the states of the events in the list,
          * nr_active, and the list:
@@ -788,6 +901,7 @@ struct perf_event_context {
         int                             nr_active;
         int                             is_active;
         int                             nr_stat;
+        int                             rotate_disable;
         atomic_t                        refcount;
         struct task_struct              *task;
 
@@ -806,8 +920,15 @@ struct perf_event_context {
         u64                             generation;
         int                             pin_count;
         struct rcu_head                 rcu_head;
+        int                             nr_cgroups; /* cgroup events present */
 };
 
+/*
+ * Number of contexts where an event can trigger:
+ *      task, softirq, hardirq, nmi.
+ */
+#define PERF_NR_CONTEXTS        4
+
 /**
  * struct perf_event_cpu_context - per cpu event context structure
  */
@@ -815,18 +936,11 @@ struct perf_cpu_context {
         struct perf_event_context       ctx;
         struct perf_event_context       *task_ctx;
         int                             active_oncpu;
-        int                             max_pertask;
         int                             exclusive;
-        struct swevent_hlist            *swevent_hlist;
-        struct mutex                    hlist_mutex;
-        int                             hlist_refcount;
-
-        /*
-         * Recursion avoidance:
-         *
-         * task, softirq, irq, nmi context
-         */
-        int                             recursion[4];
+        struct list_head                rotation_list;
+        int                             jiffies_interval;
+        struct pmu                      *active_pmu;
+        struct perf_cgroup              *cgrp;
 };
 
 struct perf_output_handle {
@@ -842,26 +956,20 @@ struct perf_output_handle {
 
 #ifdef CONFIG_PERF_EVENTS
 
-/*
- * Set by architecture code:
- */
-extern int perf_max_events;
+extern int perf_pmu_register(struct pmu *pmu, char *name, int type);
+extern void perf_pmu_unregister(struct pmu *pmu);
 
-extern const struct pmu *hw_perf_event_init(struct perf_event *event);
-
-extern void perf_event_task_sched_in(struct task_struct *task);
-extern void perf_event_task_sched_out(struct task_struct *task, struct task_struct *next);
-extern void perf_event_task_tick(struct task_struct *task);
+extern int perf_num_counters(void);
+extern const char *perf_pmu_name(void);
+extern void __perf_event_task_sched_in(struct task_struct *task);
+extern void __perf_event_task_sched_out(struct task_struct *task, struct task_struct *next);
 extern int perf_event_init_task(struct task_struct *child);
 extern void perf_event_exit_task(struct task_struct *child);
 extern void perf_event_free_task(struct task_struct *task);
-extern void set_perf_event_pending(void);
-extern void perf_event_do_pending(void);
+extern void perf_event_delayed_put(struct task_struct *task);
 extern void perf_event_print_debug(void);
-extern void __perf_disable(void);
-extern bool __perf_enable(void);
-extern void perf_disable(void);
-extern void perf_enable(void);
+extern void perf_pmu_disable(struct pmu *pmu);
+extern void perf_pmu_enable(struct pmu *pmu);
 extern int perf_event_task_disable(void);
 extern int perf_event_task_enable(void);
 extern void perf_event_update_userpage(struct perf_event *event);
@@ -869,7 +977,7 @@ extern int perf_event_release_kernel(struct perf_event *event);
 extern struct perf_event *
 perf_event_create_kernel_counter(struct perf_event_attr *attr,
                                 int cpu,
-                                pid_t pid,
+                                struct task_struct *task,
                                 perf_overflow_handler_t callback);
 extern u64 perf_event_read_value(struct perf_event *event,
                                  u64 *enabled, u64 *running);
@@ -895,8 +1003,7 @@ struct perf_sample_data {
         struct perf_raw_record          *raw;
 };
 
-static inline
-void perf_sample_data_init(struct perf_sample_data *data, u64 addr)
+static inline void perf_sample_data_init(struct perf_sample_data *data, u64 addr)
 {
         data->addr = addr;
         data->raw  = NULL;
@@ -915,28 +1022,25 @@ extern int perf_event_overflow(struct perf_event *event, int nmi,
                                  struct perf_sample_data *data,
                                  struct pt_regs *regs);
 
+static inline bool is_sampling_event(struct perf_event *event)
+{
+        return event->attr.sample_period != 0;
+}
+
 /*
  * Return 1 for a software event, 0 for a hardware event
  */
 static inline int is_software_event(struct perf_event *event)
 {
-        switch (event->attr.type) {
-        case PERF_TYPE_SOFTWARE:
-        case PERF_TYPE_TRACEPOINT:
-        /* for now the breakpoint stuff also works as software event */
-        case PERF_TYPE_BREAKPOINT:
-                return 1;
-        }
-        return 0;
+        return event->pmu->task_ctx_nr == perf_sw_context;
 }
 
-extern atomic_t perf_swevent_enabled[PERF_COUNT_SW_MAX];
+extern struct jump_label_key perf_swevent_enabled[PERF_COUNT_SW_MAX];
 
 extern void __perf_sw_event(u32, u64, int, struct pt_regs *, u64);
 
 #ifndef perf_arch_fetch_caller_regs
-static inline void
-perf_arch_fetch_caller_regs(struct pt_regs *regs, unsigned long ip) { }
+static inline void perf_arch_fetch_caller_regs(struct pt_regs *regs, unsigned long ip) { }
 #endif
 
 /*
@@ -954,12 +1058,12 @@ static inline void perf_fetch_caller_regs(struct pt_regs *regs)
         perf_arch_fetch_caller_regs(regs, CALLER_ADDR0);
 }
 
-static inline void
+static __always_inline void
 perf_sw_event(u32 event_id, u64 nr, int nmi, struct pt_regs *regs, u64 addr)
 {
-        if (atomic_read(&perf_swevent_enabled[event_id])) {
-                struct pt_regs hot_regs;
+        struct pt_regs hot_regs;
 
+        if (static_branch(&perf_swevent_enabled[event_id])) {
                 if (!regs) {
                         perf_fetch_caller_regs(&hot_regs);
                         regs = &hot_regs;
@@ -968,6 +1072,21 @@ perf_sw_event(u32 event_id, u64 nr, int nmi, struct pt_regs *regs, u64 addr)
         }
 }
 
+extern struct jump_label_key perf_sched_events;
+
+static inline void perf_event_task_sched_in(struct task_struct *task)
+{
+        if (static_branch(&perf_sched_events))
+                __perf_event_task_sched_in(task);
+}
+
+static inline void perf_event_task_sched_out(struct task_struct *task, struct task_struct *next)
+{
+        perf_sw_event(PERF_COUNT_SW_CONTEXT_SWITCHES, 1, 1, NULL, 0);
+
+        __perf_event_task_sched_out(task, next);
+}
+
 extern void perf_event_mmap(struct vm_area_struct *vma);
 extern struct perf_guest_info_callbacks *perf_guest_cbs;
 extern int perf_register_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks);
@@ -976,12 +1095,26 @@ extern int perf_unregister_guest_info_callbacks(struct perf_guest_info_callbacks
 extern void perf_event_comm(struct task_struct *tsk);
 extern void perf_event_fork(struct task_struct *tsk);
 
-extern struct perf_callchain_entry *perf_callchain(struct pt_regs *regs);
+/* Callchains */
+DECLARE_PER_CPU(struct perf_callchain_entry, perf_callchain_entry);
+
+extern void perf_callchain_user(struct perf_callchain_entry *entry, struct pt_regs *regs);
+extern void perf_callchain_kernel(struct perf_callchain_entry *entry, struct pt_regs *regs);
+
+static inline void perf_callchain_store(struct perf_callchain_entry *entry, u64 ip)
+{
+        if (entry->nr < PERF_MAX_STACK_DEPTH)
+                entry->ip[entry->nr++] = ip;
+}
 
 extern int sysctl_perf_event_paranoid;
 extern int sysctl_perf_event_mlock;
 extern int sysctl_perf_event_sample_rate;
 
+extern int perf_proc_update_handler(struct ctl_table *table, int write,
+                void __user *buffer, size_t *lenp,
+                loff_t *ppos);
+
 static inline bool perf_paranoid_tracepoint_raw(void)
 {
         return sysctl_perf_event_paranoid > -1;
@@ -1004,9 +1137,9 @@ extern void perf_tp_event(u64 addr, u64 count, void *record,
 extern void perf_bp_event(struct perf_event *event, void *data);
 
 #ifndef perf_misc_flags
-#define perf_misc_flags(regs)   (user_mode(regs) ? PERF_RECORD_MISC_USER : \
-                                 PERF_RECORD_MISC_KERNEL)
-#define perf_instruction_pointer(regs)  instruction_pointer(regs)
+# define perf_misc_flags(regs) \
+                (user_mode(regs) ? PERF_RECORD_MISC_USER : PERF_RECORD_MISC_KERNEL)
+# define perf_instruction_pointer(regs) instruction_pointer(regs)
 #endif
 
 extern int perf_output_begin(struct perf_output_handle *handle,
@@ -1019,21 +1152,18 @@ extern int perf_swevent_get_recursion_context(void);
 extern void perf_swevent_put_recursion_context(int rctx);
 extern void perf_event_enable(struct perf_event *event);
 extern void perf_event_disable(struct perf_event *event);
+extern void perf_event_task_tick(void);
 #else
 static inline void
 perf_event_task_sched_in(struct task_struct *task)                      { }
 static inline void
 perf_event_task_sched_out(struct task_struct *task,
                             struct task_struct *next)                   { }
-static inline void
-perf_event_task_tick(struct task_struct *task)                          { }
 static inline int perf_event_init_task(struct task_struct *child)       { return 0; }
 static inline void perf_event_exit_task(struct task_struct *child)      { }
 static inline void perf_event_free_task(struct task_struct *task)       { }
-static inline void perf_event_do_pending(void)                          { }
+static inline void perf_event_delayed_put(struct task_struct *task)     { }
 static inline void perf_event_print_debug(void)                         { }
-static inline void perf_disable(void)                                   { }
-static inline void perf_enable(void)                                    { }
 static inline int perf_event_task_disable(void)                         { return -EINVAL; }
 static inline int perf_event_task_enable(void)                          { return -EINVAL; }
 
@@ -1044,9 +1174,9 @@ static inline void
 perf_bp_event(struct perf_event *event, void *data)                     { }
 
 static inline int perf_register_guest_info_callbacks
-(struct perf_guest_info_callbacks *callbacks) { return 0; }
+(struct perf_guest_info_callbacks *callbacks)                           { return 0; }
 static inline int perf_unregister_guest_info_callbacks
-(struct perf_guest_info_callbacks *callbacks) { return 0; }
+(struct perf_guest_info_callbacks *callbacks)                           { return 0; }
 
 static inline void perf_event_mmap(struct vm_area_struct *vma)          { }
 static inline void perf_event_comm(struct task_struct *tsk)             { }
@@ -1056,25 +1186,25 @@ static inline int  perf_swevent_get_recursion_context(void)		{ return -1; }
 static inline void perf_swevent_put_recursion_context(int rctx)         { }
 static inline void perf_event_enable(struct perf_event *event)          { }
 static inline void perf_event_disable(struct perf_event *event)         { }
+static inline void perf_event_task_tick(void)                           { }
 #endif
 
-#define perf_output_put(handle, x) \
-        perf_output_copy((handle), &(x), sizeof(x))
+#define perf_output_put(handle, x) perf_output_copy((handle), &(x), sizeof(x))
 
 /*
  * This has to have a higher priority than migration_notifier in sched.c.
  */
-#define perf_cpu_notifier(fn)                                   \
-do {                                                            \
-        static struct notifier_block fn##_nb __cpuinitdata =    \
-                { .notifier_call = fn, .priority = CPU_PRI_PERF }; \
-        fn(&fn##_nb, (unsigned long)CPU_UP_PREPARE,             \
-                (void *)(unsigned long)smp_processor_id());     \
-        fn(&fn##_nb, (unsigned long)CPU_STARTING,               \
-                (void *)(unsigned long)smp_processor_id());     \
-        fn(&fn##_nb, (unsigned long)CPU_ONLINE,                 \
-                (void *)(unsigned long)smp_processor_id());     \
-        register_cpu_notifier(&fn##_nb);                        \
+#define perf_cpu_notifier(fn)                                           \
+do {                                                                    \
+        static struct notifier_block fn##_nb __cpuinitdata =            \
+                { .notifier_call = fn, .priority = CPU_PRI_PERF };      \
+        fn(&fn##_nb, (unsigned long)CPU_UP_PREPARE,                     \
+                (void *)(unsigned long)smp_processor_id());             \
+        fn(&fn##_nb, (unsigned long)CPU_STARTING,                       \
+                (void *)(unsigned long)smp_processor_id());             \
+        fn(&fn##_nb, (unsigned long)CPU_ONLINE,                         \
+                (void *)(unsigned long)smp_processor_id());             \
+        register_cpu_notifier(&fn##_nb);                                \
 } while (0)
 
 #endif /* __KERNEL__ */