10 files changed, 85 insertions, 108 deletions

diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index 41e46330d9be..dcd6a7c3a435 100644
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -1,3 +1,8 @@
+/*
+ * Ftrace header.  For implementation details beyond the random comments
+ * scattered below, see: Documentation/trace/ftrace-design.txt
+ */
+
 #ifndef _LINUX_FTRACE_H
 #define _LINUX_FTRACE_H
 
diff --git a/include/linux/ftrace_event.h b/include/linux/ftrace_event.h
index 3167f2df4126..02b8b24f8f51 100644
--- a/include/linux/ftrace_event.h
+++ b/include/linux/ftrace_event.h
@@ -11,8 +11,6 @@ struct trace_array;
 struct tracer;
 struct dentry;
 
-DECLARE_PER_CPU(struct trace_seq, ftrace_event_seq);
-
 struct trace_print_flags {
         unsigned long           mask;
         const char              *name;
@@ -58,6 +56,9 @@ struct trace_iterator {
         struct ring_buffer_iter *buffer_iter[NR_CPUS];
         unsigned long           iter_flags;
 
+        /* trace_seq for __print_flags() and __print_symbolic() etc. */
+        struct trace_seq        tmp_seq;
+
         /* The below is zeroed out in pipe_read */
         struct trace_seq        seq;
         struct trace_entry      *ent;
@@ -146,14 +147,19 @@ struct ftrace_event_class {
         int                     (*raw_init)(struct ftrace_event_call *);
 };
 
+extern int ftrace_event_reg(struct ftrace_event_call *event,
+                            enum trace_reg type);
+
 enum {
         TRACE_EVENT_FL_ENABLED_BIT,
         TRACE_EVENT_FL_FILTERED_BIT,
+        TRACE_EVENT_FL_RECORDED_CMD_BIT,
 };
 
 enum {
-        TRACE_EVENT_FL_ENABLED  = (1 << TRACE_EVENT_FL_ENABLED_BIT),
-        TRACE_EVENT_FL_FILTERED = (1 << TRACE_EVENT_FL_FILTERED_BIT),
+        TRACE_EVENT_FL_ENABLED          = (1 << TRACE_EVENT_FL_ENABLED_BIT),
+        TRACE_EVENT_FL_FILTERED         = (1 << TRACE_EVENT_FL_FILTERED_BIT),
+        TRACE_EVENT_FL_RECORDED_CMD     = (1 << TRACE_EVENT_FL_RECORDED_CMD_BIT),
 };
 
 struct ftrace_event_call {
@@ -171,6 +177,7 @@ struct ftrace_event_call {
          * 32 bit flags:
          *   bit 1:             enabled
          *   bit 2:             filter_active
+         *   bit 3:             enabled cmd record
          *
          * Changes to flags must hold the event_mutex.
          *
@@ -257,8 +264,7 @@ static inline void
 perf_trace_buf_submit(void *raw_data, int size, int rctx, u64 addr,
                        u64 count, struct pt_regs *regs, void *head)
 {
-        perf_tp_event(addr, count, raw_data, size, regs, head);
-        perf_swevent_put_recursion_context(rctx);
+        perf_tp_event(addr, count, raw_data, size, regs, head, rctx);
 }
 #endif
 
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 5de838b0fc1a..38e462e00594 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -513,9 +513,6 @@ extern void tracing_start(void);
 extern void tracing_stop(void);
 extern void ftrace_off_permanent(void);
 
-extern void
-ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3);
-
 static inline void __attribute__ ((format (printf, 1, 2)))
 ____trace_printk_check_format(const char *fmt, ...)
 {
@@ -591,8 +588,6 @@ __ftrace_vprintk(unsigned long ip, const char *fmt, va_list ap);
 
 extern void ftrace_dump(enum ftrace_dump_mode oops_dump_mode);
 #else
-static inline void
-ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3) { }
 static inline int
 trace_printk(const char *fmt, ...) __attribute__ ((format (printf, 1, 2)));
 
diff --git a/include/linux/kmemtrace.h b/include/linux/kmemtrace.h
deleted file mode 100644
index b616d3930c3b..000000000000
--- a/include/linux/kmemtrace.h
+++ /dev/null
@@ -1,25 +0,0 @@
-/*
- * Copyright (C) 2008 Eduard - Gabriel Munteanu
- *
- * This file is released under GPL version 2.
- */
-
-#ifndef _LINUX_KMEMTRACE_H
-#define _LINUX_KMEMTRACE_H
-
-#ifdef __KERNEL__
-
-#include <trace/events/kmem.h>
-
-#ifdef CONFIG_KMEMTRACE
-extern void kmemtrace_init(void);
-#else
-static inline void kmemtrace_init(void)
-{
-}
-#endif
-
-#endif /* __KERNEL__ */
-
-#endif /* _LINUX_KMEMTRACE_H */
-
diff --git a/include/linux/nmi.h b/include/linux/nmi.h
index b752e807adde..06aab5eee134 100644
--- a/include/linux/nmi.h
+++ b/include/linux/nmi.h
@@ -20,10 +20,14 @@ extern void touch_nmi_watchdog(void);
 extern void acpi_nmi_disable(void);
 extern void acpi_nmi_enable(void);
 #else
+#ifndef CONFIG_HARDLOCKUP_DETECTOR
 static inline void touch_nmi_watchdog(void)
 {
         touch_softlockup_watchdog();
 }
+#else
+extern void touch_nmi_watchdog(void);
+#endif
 static inline void acpi_nmi_disable(void) { }
 static inline void acpi_nmi_enable(void) { }
 #endif
@@ -47,4 +51,13 @@ static inline bool trigger_all_cpu_backtrace(void)
 }
 #endif
 
+#ifdef CONFIG_LOCKUP_DETECTOR
+int hw_nmi_is_cpu_stuck(struct pt_regs *);
+u64 hw_nmi_get_sample_period(void);
+extern int watchdog_enabled;
+struct ctl_table;
+extern int proc_dowatchdog_enabled(struct ctl_table *, int ,
+                        void __user *, size_t *, loff_t *);
+#endif
+
 #endif
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 5d0266d94985..937495c25073 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -214,8 +214,9 @@ struct perf_event_attr {
                                  *  See also PERF_RECORD_MISC_EXACT_IP
                                  */
                                 precise_ip     :  2, /* skid constraint       */
+                                mmap_data      :  1, /* non-exec mmap data    */
 
-                                __reserved_1   : 47;
+                                __reserved_1   : 46;
 
         union {
                 __u32           wakeup_events;    /* wakeup every n events */
@@ -461,6 +462,7 @@ enum perf_callchain_context {
 
 #ifdef CONFIG_PERF_EVENTS
 # include <asm/perf_event.h>
+# include <asm/local64.h>
 #endif
 
 struct perf_guest_info_callbacks {
@@ -531,14 +533,16 @@ struct hw_perf_event {
                         struct hrtimer  hrtimer;
                 };
 #ifdef CONFIG_HAVE_HW_BREAKPOINT
-                /* breakpoint */
-                struct arch_hw_breakpoint       info;
+                struct { /* breakpoint */
+                        struct arch_hw_breakpoint       info;
+                        struct list_head                bp_list;
+                };
 #endif
         };
-        atomic64_t                      prev_count;
+        local64_t                       prev_count;
         u64                             sample_period;
         u64                             last_period;
-        atomic64_t                      period_left;
+        local64_t                       period_left;
         u64                             interrupts;
 
         u64                             freq_time_stamp;
@@ -548,7 +552,10 @@ struct hw_perf_event {
 
 struct perf_event;
 
-#define PERF_EVENT_TXN_STARTED 1
+/*
+ * Common implementation detail of pmu::{start,commit,cancel}_txn
+ */
+#define PERF_EVENT_TXN 0x1
 
 /**
  * struct pmu - generic performance monitoring unit
@@ -562,14 +569,28 @@ struct pmu {
         void (*unthrottle)              (struct perf_event *event);
 
         /*
-         * group events scheduling is treated as a transaction,
-         * add group events as a whole and perform one schedulability test.
-         * If test fails, roll back the whole group
+         * 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 ->enable() doesn't need
+         * to do schedulability tests.
+         */
         void (*start_txn)       (const struct pmu *pmu);
-        void (*cancel_txn)      (const struct pmu *pmu);
+        /*
+         * If ->start_txn() disabled the ->enable() 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);
+        /*
+         * Will cancel the transaction, assumes ->disable() is called for
+         * each successfull ->enable() during the transaction.
+         */
+        void (*cancel_txn)      (const struct pmu *pmu);
 };
 
 /**
@@ -584,7 +605,9 @@ enum perf_event_active_state {
 
 struct file;
 
-struct perf_mmap_data {
+#define PERF_BUFFER_WRITABLE            0x01
+
+struct perf_buffer {
         atomic_t                        refcount;
         struct rcu_head                 rcu_head;
 #ifdef CONFIG_PERF_USE_VMALLOC
@@ -650,7 +673,8 @@ struct perf_event {
 
         enum perf_event_active_state    state;
         unsigned int                    attach_state;
-        atomic64_t                      count;
+        local64_t                       count;
+        atomic64_t                      child_count;
 
         /*
          * These are the total time in nanoseconds that the event
@@ -709,7 +733,7 @@ struct perf_event {
         atomic_t                        mmap_count;
         int                             mmap_locked;
         struct user_struct              *mmap_user;
-        struct perf_mmap_data           *data;
+        struct perf_buffer              *buffer;
 
         /* poll related */
         wait_queue_head_t               waitq;
@@ -807,7 +831,7 @@ struct perf_cpu_context {
 
 struct perf_output_handle {
         struct perf_event               *event;
-        struct perf_mmap_data           *data;
+        struct perf_buffer              *buffer;
         unsigned long                   wakeup;
         unsigned long                   size;
         void                            *addr;
@@ -910,8 +934,10 @@ extern atomic_t perf_swevent_enabled[PERF_COUNT_SW_MAX];
 
 extern void __perf_sw_event(u32, u64, int, struct pt_regs *, u64);
 
-extern void
-perf_arch_fetch_caller_regs(struct pt_regs *regs, unsigned long ip, int skip);
+#ifndef perf_arch_fetch_caller_regs
+static inline void
+perf_arch_fetch_caller_regs(struct pt_regs *regs, unsigned long ip) { }
+#endif
 
 /*
  * Take a snapshot of the regs. Skip ip and frame pointer to
@@ -921,31 +947,11 @@ perf_arch_fetch_caller_regs(struct pt_regs *regs, unsigned long ip, int skip);
  * - bp for callchains
  * - eflags, for future purposes, just in case
  */
-static inline void perf_fetch_caller_regs(struct pt_regs *regs, int skip)
+static inline void perf_fetch_caller_regs(struct pt_regs *regs)
 {
-        unsigned long ip;
-
         memset(regs, 0, sizeof(*regs));
 
-        switch (skip) {
-        case 1 :
-                ip = CALLER_ADDR0;
-                break;
-        case 2 :
-                ip = CALLER_ADDR1;
-                break;
-        case 3 :
-                ip = CALLER_ADDR2;
-                break;
-        case 4:
-                ip = CALLER_ADDR3;
-                break;
-        /* No need to support further for now */
-        default:
-                ip = 0;
-        }
-
-        return perf_arch_fetch_caller_regs(regs, ip, skip);
+        perf_arch_fetch_caller_regs(regs, CALLER_ADDR0);
 }
 
 static inline void
@@ -955,21 +961,14 @@ perf_sw_event(u32 event_id, u64 nr, int nmi, struct pt_regs *regs, u64 addr)
                 struct pt_regs hot_regs;
 
                 if (!regs) {
-                        perf_fetch_caller_regs(&hot_regs, 1);
+                        perf_fetch_caller_regs(&hot_regs);
                         regs = &hot_regs;
                 }
                 __perf_sw_event(event_id, nr, nmi, regs, addr);
         }
 }
 
-extern void __perf_event_mmap(struct vm_area_struct *vma);
-
-static inline void perf_event_mmap(struct vm_area_struct *vma)
-{
-        if (vma->vm_flags & VM_EXEC)
-                __perf_event_mmap(vma);
-}
-
+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);
 extern int perf_unregister_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks);
@@ -1001,7 +1000,7 @@ static inline bool perf_paranoid_kernel(void)
 extern void perf_event_init(void);
 extern void perf_tp_event(u64 addr, u64 count, void *record,
                           int entry_size, struct pt_regs *regs,
-                          struct hlist_head *head);
+                          struct hlist_head *head, int rctx);
 extern void perf_bp_event(struct perf_event *event, void *data);
 
 #ifndef perf_misc_flags
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 0478888c6899..3992f50de614 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -316,20 +316,16 @@ extern void scheduler_tick(void);
 
 extern void sched_show_task(struct task_struct *p);
 
-#ifdef CONFIG_DETECT_SOFTLOCKUP
-extern void softlockup_tick(void);
+#ifdef CONFIG_LOCKUP_DETECTOR
 extern void touch_softlockup_watchdog(void);
 extern void touch_softlockup_watchdog_sync(void);
 extern void touch_all_softlockup_watchdogs(void);
-extern int proc_dosoftlockup_thresh(struct ctl_table *table, int write,
-                                    void __user *buffer,
-                                    size_t *lenp, loff_t *ppos);
+extern int proc_dowatchdog_thresh(struct ctl_table *table, int write,
+                                  void __user *buffer,
+                                  size_t *lenp, loff_t *ppos);
 extern unsigned int  softlockup_panic;
 extern int softlockup_thresh;
 #else
-static inline void softlockup_tick(void)
-{
-}
 static inline void touch_softlockup_watchdog(void)
 {
 }
@@ -2435,18 +2431,6 @@ static inline void set_task_cpu(struct task_struct *p, unsigned int cpu)
 
 #endif /* CONFIG_SMP */
 
-#ifdef CONFIG_TRACING
-extern void
-__trace_special(void *__tr, void *__data,
-                unsigned long arg1, unsigned long arg2, unsigned long arg3);
-#else
-static inline void
-__trace_special(void *__tr, void *__data,
-                unsigned long arg1, unsigned long arg2, unsigned long arg3)
-{
-}
-#endif
-
 extern long sched_setaffinity(pid_t pid, const struct cpumask *new_mask);
 extern long sched_getaffinity(pid_t pid, struct cpumask *mask);
 
diff --git a/include/linux/slab_def.h b/include/linux/slab_def.h
index 1812dac8c496..1acfa73ce2ac 100644
--- a/include/linux/slab_def.h
+++ b/include/linux/slab_def.h
@@ -14,7 +14,8 @@
 #include <asm/page.h>           /* kmalloc_sizes.h needs PAGE_SIZE */
 #include <asm/cache.h>          /* kmalloc_sizes.h needs L1_CACHE_BYTES */
 #include <linux/compiler.h>
-#include <linux/kmemtrace.h>
+
+#include <trace/events/kmem.h>
 
 #ifndef ARCH_KMALLOC_MINALIGN
 /*
diff --git a/include/linux/slub_def.h b/include/linux/slub_def.h
index 4ba59cfc1f75..6447a723ecb1 100644
--- a/include/linux/slub_def.h
+++ b/include/linux/slub_def.h
@@ -10,9 +10,10 @@
 #include <linux/gfp.h>
 #include <linux/workqueue.h>
 #include <linux/kobject.h>
-#include <linux/kmemtrace.h>
 #include <linux/kmemleak.h>
 
+#include <trace/events/kmem.h>
+
 enum stat_item {
         ALLOC_FASTPATH,         /* Allocation from cpu slab */
         ALLOC_SLOWPATH,         /* Allocation by getting a new cpu slab */
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 13ebb5413a79..a6bfd1367d2a 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -167,7 +167,6 @@ extern struct trace_event_functions exit_syscall_print_funcs;
                 .enter_event    = &event_enter_##sname,         \
                 .exit_event     = &event_exit_##sname,          \
                 .enter_fields   = LIST_HEAD_INIT(__syscall_meta_##sname.enter_fields), \
-                .exit_fields    = LIST_HEAD_INIT(__syscall_meta_##sname.exit_fields), \
         };
 
 #define SYSCALL_DEFINE0(sname)                                  \
@@ -182,7 +181,6 @@ extern struct trace_event_functions exit_syscall_print_funcs;
                 .enter_event    = &event_enter__##sname,        \
                 .exit_event     = &event_exit__##sname,         \
                 .enter_fields   = LIST_HEAD_INIT(__syscall_meta__##sname.enter_fields), \
-                .exit_fields    = LIST_HEAD_INIT(__syscall_meta__##sname.exit_fields), \
         };                                                      \
         asmlinkage long sys_##sname(void)
 #else