Merge branch 'next' into for-linus

19 files changed, 409 insertions, 438 deletions

diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index d006554888dc..6c22d8a2f289 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -12,17 +12,17 @@ config NOP_TRACER
 config HAVE_FTRACE_NMI_ENTER
         bool
         help
-          See Documentation/trace/ftrace-implementation.txt
+          See Documentation/trace/ftrace-design.txt
 
 config HAVE_FUNCTION_TRACER
         bool
         help
-          See Documentation/trace/ftrace-implementation.txt
+          See Documentation/trace/ftrace-design.txt
 
 config HAVE_FUNCTION_GRAPH_TRACER
         bool
         help
-          See Documentation/trace/ftrace-implementation.txt
+          See Documentation/trace/ftrace-design.txt
 
 config HAVE_FUNCTION_GRAPH_FP_TEST
         bool
@@ -34,17 +34,17 @@ config HAVE_FUNCTION_GRAPH_FP_TEST
 config HAVE_FUNCTION_TRACE_MCOUNT_TEST
         bool
         help
-          See Documentation/trace/ftrace-implementation.txt
+          See Documentation/trace/ftrace-design.txt
 
 config HAVE_DYNAMIC_FTRACE
         bool
         help
-          See Documentation/trace/ftrace-implementation.txt
+          See Documentation/trace/ftrace-design.txt
 
 config HAVE_FTRACE_MCOUNT_RECORD
         bool
         help
-          See Documentation/trace/ftrace-implementation.txt
+          See Documentation/trace/ftrace-design.txt
 
 config HAVE_HW_BRANCH_TRACER
         bool
@@ -52,7 +52,7 @@ config HAVE_HW_BRANCH_TRACER
 config HAVE_SYSCALL_TRACEPOINTS
         bool
         help
-          See Documentation/trace/ftrace-implementation.txt
+          See Documentation/trace/ftrace-design.txt
 
 config TRACER_MAX_TRACE
         bool
@@ -83,7 +83,7 @@ config RING_BUFFER_ALLOW_SWAP
 # This allows those options to appear when no other tracer is selected. But the
 # options do not appear when something else selects it. We need the two options
 # GENERIC_TRACER and TRACING to avoid circular dependencies to accomplish the
-# hidding of the automatic options.
+# hiding of the automatic options.
 
 config TRACING
         bool
@@ -119,7 +119,7 @@ menuconfig FTRACE
         bool "Tracers"
         default y if DEBUG_KERNEL
         help
-         Enable the kernel tracing infrastructure.
+          Enable the kernel tracing infrastructure.
 
 if FTRACE
 
@@ -133,7 +133,7 @@ config FUNCTION_TRACER
         help
           Enable the kernel to trace every kernel function. This is done
           by using a compiler feature to insert a small, 5-byte No-Operation
-          instruction to the beginning of every kernel function, which NOP
+          instruction at the beginning of every kernel function, which NOP
           sequence is then dynamically patched into a tracer call when
           tracing is enabled by the administrator. If it's runtime disabled
           (the bootup default), then the overhead of the instructions is very
@@ -150,7 +150,7 @@ config FUNCTION_GRAPH_TRACER
           and its entry.
           Its first purpose is to trace the duration of functions and
           draw a call graph for each thread with some information like
-          the return value. This is done by setting the current return 
+          the return value. This is done by setting the current return
           address on the current task structure into a stack of calls.
 
 
@@ -173,7 +173,7 @@ config IRQSOFF_TRACER
 
               echo 0 > /sys/kernel/debug/tracing/tracing_max_latency
 
-          (Note that kernel size and overhead increases with this option
+          (Note that kernel size and overhead increase with this option
           enabled. This option and the preempt-off timing option can be
           used together or separately.)
 
@@ -186,7 +186,7 @@ config PREEMPT_TRACER
         select TRACER_MAX_TRACE
         select RING_BUFFER_ALLOW_SWAP
         help
-          This option measures the time spent in preemption off critical
+          This option measures the time spent in preemption-off critical
           sections, with microsecond accuracy.
 
           The default measurement method is a maximum search, which is
@@ -195,7 +195,7 @@ config PREEMPT_TRACER
 
               echo 0 > /sys/kernel/debug/tracing/tracing_max_latency
 
-          (Note that kernel size and overhead increases with this option
+          (Note that kernel size and overhead increase with this option
           enabled. This option and the irqs-off timing option can be
           used together or separately.)
 
@@ -222,7 +222,7 @@ config ENABLE_DEFAULT_TRACERS
         depends on !GENERIC_TRACER
         select TRACING
         help
-          This tracer hooks to various trace points in the kernel
+          This tracer hooks to various trace points in the kernel,
           allowing the user to pick and choose which trace point they
           want to trace. It also includes the sched_switch tracer plugin.
 
@@ -265,19 +265,19 @@ choice
          The likely/unlikely profiler only looks at the conditions that
          are annotated with a likely or unlikely macro.
 
-         The "all branch" profiler will profile every if statement in the
+         The "all branch" profiler will profile every if-statement in the
          kernel. This profiler will also enable the likely/unlikely
-         profiler as well.
+         profiler.
 
-         Either of the above profilers add a bit of overhead to the system.
-         If unsure choose "No branch profiling".
+         Either of the above profilers adds a bit of overhead to the system.
+         If unsure, choose "No branch profiling".
 
 config BRANCH_PROFILE_NONE
         bool "No branch profiling"
         help
-         No branch profiling. Branch profiling adds a bit of overhead.
-         Only enable it if you want to analyse the branching behavior.
-         Otherwise keep it disabled.
+          No branch profiling. Branch profiling adds a bit of overhead.
+          Only enable it if you want to analyse the branching behavior.
+          Otherwise keep it disabled.
 
 config PROFILE_ANNOTATED_BRANCHES
         bool "Trace likely/unlikely profiler"
@@ -288,7 +288,7 @@ config PROFILE_ANNOTATED_BRANCHES
 
           /sys/kernel/debug/tracing/profile_annotated_branch
 
-          Note: this will add a significant overhead, only turn this
+          Note: this will add a significant overhead; only turn this
           on if you need to profile the system's use of these macros.
 
 config PROFILE_ALL_BRANCHES
@@ -305,7 +305,7 @@ config PROFILE_ALL_BRANCHES
 
           This configuration, when enabled, will impose a great overhead
           on the system. This should only be enabled when the system
-          is to be analyzed
+          is to be analyzed in much detail.
 endchoice
 
 config TRACING_BRANCHES
@@ -335,7 +335,7 @@ config POWER_TRACER
         depends on X86
         select GENERIC_TRACER
         help
-          This tracer helps developers to analyze and optimize the kernels
+          This tracer helps developers to analyze and optimize the kernel's
           power management decisions, specifically the C-state and P-state
           behavior.
 
@@ -391,14 +391,14 @@ config HW_BRANCH_TRACER
         select GENERIC_TRACER
         help
           This tracer records all branches on the system in a circular
-          buffer giving access to the last N branches for each cpu.
+          buffer, giving access to the last N branches for each cpu.
 
 config KMEMTRACE
         bool "Trace SLAB allocations"
         select GENERIC_TRACER
         help
           kmemtrace provides tracing for slab allocator functions, such as
-          kmalloc, kfree, kmem_cache_alloc, kmem_cache_free etc.. Collected
+          kmalloc, kfree, kmem_cache_alloc, kmem_cache_free, etc. Collected
           data is then fed to the userspace application in order to analyse
           allocation hotspots, internal fragmentation and so on, making it
           possible to see how well an allocator performs, as well as debug
@@ -417,15 +417,15 @@ config WORKQUEUE_TRACER
         bool "Trace workqueues"
         select GENERIC_TRACER
         help
-          The workqueue tracer provides some statistical informations
+          The workqueue tracer provides some statistical information
           about each cpu workqueue thread such as the number of the
           works inserted and executed since their creation. It can help
-          to evaluate the amount of work each of them have to perform.
+          to evaluate the amount of work each of them has to perform.
           For example it can help a developer to decide whether he should
-          choose a per cpu workqueue instead of a singlethreaded one.
+          choose a per-cpu workqueue instead of a singlethreaded one.
 
 config BLK_DEV_IO_TRACE
-        bool "Support for tracing block io actions"
+        bool "Support for tracing block IO actions"
         depends on SYSFS
         depends on BLOCK
         select RELAY
@@ -456,15 +456,15 @@ config KPROBE_EVENT
         select TRACING
         default y
         help
-          This allows the user to add tracing events (similar to tracepoints) on the fly
-          via the ftrace interface. See Documentation/trace/kprobetrace.txt
-          for more details.
+          This allows the user to add tracing events (similar to tracepoints)
+          on the fly via the ftrace interface. See
+          Documentation/trace/kprobetrace.txt for more details.
 
           Those events can be inserted wherever kprobes can probe, and record
           various register and memory values.
 
-          This option is also required by perf-probe subcommand of perf tools. If
-          you want to use perf tools, this option is strongly recommended.
+          This option is also required by perf-probe subcommand of perf tools.
+          If you want to use perf tools, this option is strongly recommended.
 
 config DYNAMIC_FTRACE
         bool "enable/disable ftrace tracepoints dynamically"
@@ -472,32 +472,32 @@ config DYNAMIC_FTRACE
         depends on HAVE_DYNAMIC_FTRACE
         default y
         help
-         This option will modify all the calls to ftrace dynamically
-         (will patch them out of the binary image and replaces them
-         with a No-Op instruction) as they are called. A table is
-         created to dynamically enable them again.
+          This option will modify all the calls to ftrace dynamically
+          (will patch them out of the binary image and replace them
+          with a No-Op instruction) as they are called. A table is
+          created to dynamically enable them again.
 
-         This way a CONFIG_FUNCTION_TRACER kernel is slightly larger, but otherwise
-         has native performance as long as no tracing is active.
+          This way a CONFIG_FUNCTION_TRACER kernel is slightly larger, but
+          otherwise has native performance as long as no tracing is active.
 
-         The changes to the code are done by a kernel thread that
-         wakes up once a second and checks to see if any ftrace calls
-         were made. If so, it runs stop_machine (stops all CPUS)
-         and modifies the code to jump over the call to ftrace.
+          The changes to the code are done by a kernel thread that
+          wakes up once a second and checks to see if any ftrace calls
+          were made. If so, it runs stop_machine (stops all CPUS)
+          and modifies the code to jump over the call to ftrace.
 
 config FUNCTION_PROFILER
         bool "Kernel function profiler"
         depends on FUNCTION_TRACER
         default n
         help
-         This option enables the kernel function profiler. A file is created
-         in debugfs called function_profile_enabled which defaults to zero.
-         When a 1 is echoed into this file profiling begins, and when a
-         zero is entered, profiling stops. A file in the trace_stats
-         directory called functions, that show the list of functions that
-         have been hit and their counters.
+          This option enables the kernel function profiler. A file is created
+          in debugfs called function_profile_enabled which defaults to zero.
+          When a 1 is echoed into this file profiling begins, and when a
+          zero is entered, profiling stops. A "functions" file is created in
+          the trace_stats directory; this file shows the list of functions that
+          have been hit and their counters.
 
-         If in doubt, say N
+          If in doubt, say N.
 
 config FTRACE_MCOUNT_RECORD
         def_bool y
@@ -556,8 +556,8 @@ config RING_BUFFER_BENCHMARK
         tristate "Ring buffer benchmark stress tester"
         depends on RING_BUFFER
         help
-          This option creates a test to stress the ring buffer and bench mark it.
-          It creates its own ring buffer such that it will not interfer with
+          This option creates a test to stress the ring buffer and benchmark it.
+          It creates its own ring buffer such that it will not interfere with
           any other users of the ring buffer (such as ftrace). It then creates
           a producer and consumer that will run for 10 seconds and sleep for
           10 seconds. Each interval it will print out the number of events
@@ -566,7 +566,7 @@ config RING_BUFFER_BENCHMARK
           It does not disable interrupts or raise its priority, so it may be
           affected by processes that are running.
 
-          If unsure, say N
+          If unsure, say N.
 
 endif # FTRACE
 
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index e51a1bcb7bed..1e6640f80454 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -1690,7 +1690,7 @@ ftrace_regex_lseek(struct file *file, loff_t offset, int origin)
 static int ftrace_match(char *str, char *regex, int len, int type)
 {
         int matched = 0;
-        char *ptr;
+        int slen;
 
         switch (type) {
         case MATCH_FULL:
@@ -1706,8 +1706,8 @@ static int ftrace_match(char *str, char *regex, int len, int type)
                         matched = 1;
                 break;
         case MATCH_END_ONLY:
-                ptr = strstr(str, regex);
-                if (ptr && (ptr[len] == 0))
+                slen = strlen(str);
+                if (slen >= len && memcmp(str + slen - len, regex, len) == 0)
                         matched = 1;
                 break;
         }
@@ -1724,7 +1724,7 @@ ftrace_match_record(struct dyn_ftrace *rec, char *regex, int len, int type)
         return ftrace_match(str, regex, len, type);
 }
 
-static void ftrace_match_records(char *buff, int len, int enable)
+static int ftrace_match_records(char *buff, int len, int enable)
 {
         unsigned int search_len;
         struct ftrace_page *pg;
@@ -1733,6 +1733,7 @@ static void ftrace_match_records(char *buff, int len, int enable)
         char *search;
         int type;
         int not;
+        int found = 0;
 
         flag = enable ? FTRACE_FL_FILTER : FTRACE_FL_NOTRACE;
         type = filter_parse_regex(buff, len, &search, &not);
@@ -1750,6 +1751,7 @@ static void ftrace_match_records(char *buff, int len, int enable)
                                 rec->flags &= ~flag;
                         else
                                 rec->flags |= flag;
+                        found = 1;
                 }
                 /*
                  * Only enable filtering if we have a function that
@@ -1759,6 +1761,8 @@ static void ftrace_match_records(char *buff, int len, int enable)
                         ftrace_filtered = 1;
         } while_for_each_ftrace_rec();
         mutex_unlock(&ftrace_lock);
+
+        return found;
 }
 
 static int
@@ -1780,7 +1784,7 @@ ftrace_match_module_record(struct dyn_ftrace *rec, char *mod,
                 return 1;
 }
 
-static void ftrace_match_module_records(char *buff, char *mod, int enable)
+static int ftrace_match_module_records(char *buff, char *mod, int enable)
 {
         unsigned search_len = 0;
         struct ftrace_page *pg;
@@ -1789,6 +1793,7 @@ static void ftrace_match_module_records(char *buff, char *mod, int enable)
         char *search = buff;
         unsigned long flag;
         int not = 0;
+        int found = 0;
 
         flag = enable ? FTRACE_FL_FILTER : FTRACE_FL_NOTRACE;
 
@@ -1819,12 +1824,15 @@ static void ftrace_match_module_records(char *buff, char *mod, int enable)
                                 rec->flags &= ~flag;
                         else
                                 rec->flags |= flag;
+                        found = 1;
                 }
                 if (enable && (rec->flags & FTRACE_FL_FILTER))
                         ftrace_filtered = 1;
 
         } while_for_each_ftrace_rec();
         mutex_unlock(&ftrace_lock);
+
+        return found;
 }
 
 /*
@@ -1853,8 +1861,9 @@ ftrace_mod_callback(char *func, char *cmd, char *param, int enable)
         if (!strlen(mod))
                 return -EINVAL;
 
-        ftrace_match_module_records(func, mod, enable);
-        return 0;
+        if (ftrace_match_module_records(func, mod, enable))
+                return 0;
+        return -EINVAL;
 }
 
 static struct ftrace_func_command ftrace_mod_cmd = {
@@ -2151,8 +2160,9 @@ static int ftrace_process_regex(char *buff, int len, int enable)
         func = strsep(&next, ":");
 
         if (!next) {
-                ftrace_match_records(func, len, enable);
-                return 0;
+                if (ftrace_match_records(func, len, enable))
+                        return 0;
+                return ret;
         }
 
         /* command found */
@@ -2198,10 +2208,9 @@ ftrace_regex_write(struct file *file, const char __user *ubuf,
             !trace_parser_cont(parser)) {
                 ret = ftrace_process_regex(parser->buffer,
                                            parser->idx, enable);
+                trace_parser_clear(parser);
                 if (ret)
                         goto out_unlock;
-
-                trace_parser_clear(parser);
         }
 
         ret = read;
@@ -2543,10 +2552,9 @@ ftrace_set_func(unsigned long *array, int *idx, char *buffer)
                                         exists = true;
                                         break;
                                 }
-                        if (!exists) {
+                        if (!exists)
                                 array[(*idx)++] = rec->ip;
-                                found = 1;
-                        }
+                        found = 1;
                 }
         } while_for_each_ftrace_rec();
 
diff --git a/kernel/trace/power-traces.c b/kernel/trace/power-traces.c
index e06c6e3d56a3..9f4f565b01e6 100644
--- a/kernel/trace/power-traces.c
+++ b/kernel/trace/power-traces.c
@@ -14,7 +14,5 @@
 #define CREATE_TRACE_POINTS
 #include <trace/events/power.h>
 
-EXPORT_TRACEPOINT_SYMBOL_GPL(power_start);
-EXPORT_TRACEPOINT_SYMBOL_GPL(power_end);
 EXPORT_TRACEPOINT_SYMBOL_GPL(power_frequency);
 
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index a1ca4956ab5e..edefe3b2801b 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -423,7 +423,7 @@ struct ring_buffer_per_cpu {
         int                             cpu;
         struct ring_buffer              *buffer;
         spinlock_t                      reader_lock;    /* serialize readers */
-        raw_spinlock_t                  lock;
+        arch_spinlock_t                 lock;
         struct lock_class_key           lock_key;
         struct list_head                *pages;
         struct buffer_page              *head_page;     /* read from head */
@@ -998,7 +998,7 @@ rb_allocate_cpu_buffer(struct ring_buffer *buffer, int cpu)
         cpu_buffer->buffer = buffer;
         spin_lock_init(&cpu_buffer->reader_lock);
         lockdep_set_class(&cpu_buffer->reader_lock, buffer->reader_lock_key);
-        cpu_buffer->lock = (raw_spinlock_t)__RAW_SPIN_LOCK_UNLOCKED;
+        cpu_buffer->lock = (arch_spinlock_t)__ARCH_SPIN_LOCK_UNLOCKED;
 
         bpage = kzalloc_node(ALIGN(sizeof(*bpage), cache_line_size()),
                             GFP_KERNEL, cpu_to_node(cpu));
@@ -1193,9 +1193,6 @@ rb_remove_pages(struct ring_buffer_per_cpu *cpu_buffer, unsigned nr_pages)
         struct list_head *p;
         unsigned i;
 
-        atomic_inc(&cpu_buffer->record_disabled);
-        synchronize_sched();
-
         spin_lock_irq(&cpu_buffer->reader_lock);
         rb_head_page_deactivate(cpu_buffer);
 
@@ -1211,12 +1208,9 @@ rb_remove_pages(struct ring_buffer_per_cpu *cpu_buffer, unsigned nr_pages)
                 return;
 
         rb_reset_cpu(cpu_buffer);
-        spin_unlock_irq(&cpu_buffer->reader_lock);
-
         rb_check_pages(cpu_buffer);
 
-        atomic_dec(&cpu_buffer->record_disabled);
-
+        spin_unlock_irq(&cpu_buffer->reader_lock);
 }
 
 static void
@@ -1227,9 +1221,6 @@ rb_insert_pages(struct ring_buffer_per_cpu *cpu_buffer,
         struct list_head *p;
         unsigned i;
 
-        atomic_inc(&cpu_buffer->record_disabled);
-        synchronize_sched();
-
         spin_lock_irq(&cpu_buffer->reader_lock);
         rb_head_page_deactivate(cpu_buffer);
 
@@ -1242,11 +1233,9 @@ rb_insert_pages(struct ring_buffer_per_cpu *cpu_buffer,
                 list_add_tail(&bpage->list, cpu_buffer->pages);
         }
         rb_reset_cpu(cpu_buffer);
-        spin_unlock_irq(&cpu_buffer->reader_lock);
-
         rb_check_pages(cpu_buffer);
 
-        atomic_dec(&cpu_buffer->record_disabled);
+        spin_unlock_irq(&cpu_buffer->reader_lock);
 }
 
 /**
@@ -1254,11 +1243,6 @@ rb_insert_pages(struct ring_buffer_per_cpu *cpu_buffer,
  * @buffer: the buffer to resize.
  * @size: the new size.
  *
- * The tracer is responsible for making sure that the buffer is
- * not being used while changing the size.
- * Note: We may be able to change the above requirement by using
- *  RCU synchronizations.
- *
  * Minimum size is 2 * BUF_PAGE_SIZE.
  *
  * Returns -1 on failure.
@@ -1290,6 +1274,11 @@ int ring_buffer_resize(struct ring_buffer *buffer, unsigned long size)
         if (size == buffer_size)
                 return size;
 
+        atomic_inc(&buffer->record_disabled);
+
+        /* Make sure all writers are done with this buffer. */
+        synchronize_sched();
+
         mutex_lock(&buffer->mutex);
         get_online_cpus();
 
@@ -1352,6 +1341,8 @@ int ring_buffer_resize(struct ring_buffer *buffer, unsigned long size)
         put_online_cpus();
         mutex_unlock(&buffer->mutex);
 
+        atomic_dec(&buffer->record_disabled);
+
         return size;
 
  free_pages:
@@ -1361,6 +1352,7 @@ int ring_buffer_resize(struct ring_buffer *buffer, unsigned long size)
         }
         put_online_cpus();
         mutex_unlock(&buffer->mutex);
+        atomic_dec(&buffer->record_disabled);
         return -ENOMEM;
 
         /*
@@ -1370,6 +1362,7 @@ int ring_buffer_resize(struct ring_buffer *buffer, unsigned long size)
  out_fail:
         put_online_cpus();
         mutex_unlock(&buffer->mutex);
+        atomic_dec(&buffer->record_disabled);
         return -1;
 }
 EXPORT_SYMBOL_GPL(ring_buffer_resize);
@@ -2834,7 +2827,7 @@ rb_get_reader_page(struct ring_buffer_per_cpu *cpu_buffer)
         int ret;
 
         local_irq_save(flags);
-        __raw_spin_lock(&cpu_buffer->lock);
+        arch_spin_lock(&cpu_buffer->lock);
 
  again:
         /*
@@ -2876,7 +2869,7 @@ rb_get_reader_page(struct ring_buffer_per_cpu *cpu_buffer)
          * Splice the empty reader page into the list around the head.
          */
         reader = rb_set_head_page(cpu_buffer);
-        cpu_buffer->reader_page->list.next = reader->list.next;
+        cpu_buffer->reader_page->list.next = rb_list_head(reader->list.next);
         cpu_buffer->reader_page->list.prev = reader->list.prev;
 
         /*
@@ -2913,7 +2906,7 @@ rb_get_reader_page(struct ring_buffer_per_cpu *cpu_buffer)
          *
          * Now make the new head point back to the reader page.
          */
-        reader->list.next->prev = &cpu_buffer->reader_page->list;
+        rb_list_head(reader->list.next)->prev = &cpu_buffer->reader_page->list;
         rb_inc_page(cpu_buffer, &cpu_buffer->head_page);
 
         /* Finally update the reader page to the new head */
@@ -2923,7 +2916,7 @@ rb_get_reader_page(struct ring_buffer_per_cpu *cpu_buffer)
         goto again;
 
  out:
-        __raw_spin_unlock(&cpu_buffer->lock);
+        arch_spin_unlock(&cpu_buffer->lock);
         local_irq_restore(flags);
 
         return reader;
@@ -3286,9 +3279,9 @@ ring_buffer_read_start(struct ring_buffer *buffer, int cpu)
         synchronize_sched();
 
         spin_lock_irqsave(&cpu_buffer->reader_lock, flags);
-        __raw_spin_lock(&cpu_buffer->lock);
+        arch_spin_lock(&cpu_buffer->lock);
         rb_iter_reset(iter);
-        __raw_spin_unlock(&cpu_buffer->lock);
+        arch_spin_unlock(&cpu_buffer->lock);
         spin_unlock_irqrestore(&cpu_buffer->reader_lock, flags);
 
         return iter;
@@ -3408,11 +3401,11 @@ void ring_buffer_reset_cpu(struct ring_buffer *buffer, int cpu)
         if (RB_WARN_ON(cpu_buffer, local_read(&cpu_buffer->committing)))
                 goto out;
 
-        __raw_spin_lock(&cpu_buffer->lock);
+        arch_spin_lock(&cpu_buffer->lock);
 
         rb_reset_cpu(cpu_buffer);
 
-        __raw_spin_unlock(&cpu_buffer->lock);
+        arch_spin_unlock(&cpu_buffer->lock);
 
  out:
         spin_unlock_irqrestore(&cpu_buffer->reader_lock, flags);
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index c82dfd92fdfd..0df1b0f2cb9e 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -12,7 +12,7 @@
  *  Copyright (C) 2004 William Lee Irwin III
  */
 #include <linux/ring_buffer.h>
-#include <linux/utsrelease.h>
+#include <generated/utsrelease.h>
 #include <linux/stacktrace.h>
 #include <linux/writeback.h>
 #include <linux/kallsyms.h>
@@ -313,7 +313,6 @@ static const char *trace_options[] = {
         "bin",
         "block",
         "stacktrace",
-        "sched-tree",
         "trace_printk",
         "ftrace_preempt",
         "branch",
@@ -493,15 +492,15 @@ static ssize_t trace_seq_to_buffer(struct trace_seq *s, void *buf, size_t cnt)
  * protected by per_cpu spinlocks. But the action of the swap
  * needs its own lock.
  *
- * This is defined as a raw_spinlock_t in order to help
+ * This is defined as a arch_spinlock_t in order to help
  * with performance when lockdep debugging is enabled.
  *
  * It is also used in other places outside the update_max_tr
  * so it needs to be defined outside of the
  * CONFIG_TRACER_MAX_TRACE.
  */
-static raw_spinlock_t ftrace_max_lock =
-        (raw_spinlock_t)__RAW_SPIN_LOCK_UNLOCKED;
+static arch_spinlock_t ftrace_max_lock =
+        (arch_spinlock_t)__ARCH_SPIN_LOCK_UNLOCKED;
 
 #ifdef CONFIG_TRACER_MAX_TRACE
 unsigned long __read_mostly     tracing_max_latency;
@@ -555,13 +554,13 @@ update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu)
                 return;
 
         WARN_ON_ONCE(!irqs_disabled());
-        __raw_spin_lock(&ftrace_max_lock);
+        arch_spin_lock(&ftrace_max_lock);
 
         tr->buffer = max_tr.buffer;
         max_tr.buffer = buf;
 
         __update_max_tr(tr, tsk, cpu);
-        __raw_spin_unlock(&ftrace_max_lock);
+        arch_spin_unlock(&ftrace_max_lock);
 }
 
 /**
@@ -581,7 +580,7 @@ update_max_tr_single(struct trace_array *tr, struct task_struct *tsk, int cpu)
                 return;
 
         WARN_ON_ONCE(!irqs_disabled());
-        __raw_spin_lock(&ftrace_max_lock);
+        arch_spin_lock(&ftrace_max_lock);
 
         ftrace_disable_cpu();
 
@@ -603,7 +602,7 @@ update_max_tr_single(struct trace_array *tr, struct task_struct *tsk, int cpu)
         WARN_ON_ONCE(ret && ret != -EAGAIN && ret != -EBUSY);
 
         __update_max_tr(tr, tsk, cpu);
-        __raw_spin_unlock(&ftrace_max_lock);
+        arch_spin_unlock(&ftrace_max_lock);
 }
 #endif /* CONFIG_TRACER_MAX_TRACE */
 
@@ -802,7 +801,7 @@ static unsigned map_pid_to_cmdline[PID_MAX_DEFAULT+1];
 static unsigned map_cmdline_to_pid[SAVED_CMDLINES];
 static char saved_cmdlines[SAVED_CMDLINES][TASK_COMM_LEN];
 static int cmdline_idx;
-static raw_spinlock_t trace_cmdline_lock = __RAW_SPIN_LOCK_UNLOCKED;
+static arch_spinlock_t trace_cmdline_lock = __ARCH_SPIN_LOCK_UNLOCKED;
 
 /* temporary disable recording */
 static atomic_t trace_record_cmdline_disabled __read_mostly;
@@ -915,7 +914,7 @@ static void trace_save_cmdline(struct task_struct *tsk)
          * nor do we want to disable interrupts,
          * so if we miss here, then better luck next time.
          */
-        if (!__raw_spin_trylock(&trace_cmdline_lock))
+        if (!arch_spin_trylock(&trace_cmdline_lock))
                 return;
 
         idx = map_pid_to_cmdline[tsk->pid];
@@ -940,7 +939,7 @@ static void trace_save_cmdline(struct task_struct *tsk)
 
         memcpy(&saved_cmdlines[idx], tsk->comm, TASK_COMM_LEN);
 
-        __raw_spin_unlock(&trace_cmdline_lock);
+        arch_spin_unlock(&trace_cmdline_lock);
 }
 
 void trace_find_cmdline(int pid, char comm[])
@@ -958,14 +957,14 @@ void trace_find_cmdline(int pid, char comm[])
         }
 
         preempt_disable();
-        __raw_spin_lock(&trace_cmdline_lock);
+        arch_spin_lock(&trace_cmdline_lock);
         map = map_pid_to_cmdline[pid];
         if (map != NO_CMDLINE_MAP)
                 strcpy(comm, saved_cmdlines[map]);
         else
                 strcpy(comm, "<...>");
 
-        __raw_spin_unlock(&trace_cmdline_lock);
+        arch_spin_unlock(&trace_cmdline_lock);
         preempt_enable();
 }
 
@@ -1151,6 +1150,22 @@ void __trace_stack(struct trace_array *tr, unsigned long flags, int skip,
         __ftrace_trace_stack(tr->buffer, flags, skip, pc);
 }
 
+/**
+ * trace_dump_stack - record a stack back trace in the trace buffer
+ */
+void trace_dump_stack(void)
+{
+        unsigned long flags;
+
+        if (tracing_disabled || tracing_selftest_running)
+                return;
+
+        local_save_flags(flags);
+
+        /* skipping 3 traces, seems to get us at the caller of this function */
+        __ftrace_trace_stack(global_trace.buffer, flags, 3, preempt_count());
+}
+
 void
 ftrace_trace_userstack(struct ring_buffer *buffer, unsigned long flags, int pc)
 {
@@ -1251,8 +1266,8 @@ ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3)
  */
 int trace_vbprintk(unsigned long ip, const char *fmt, va_list args)
 {
-        static raw_spinlock_t trace_buf_lock =
-                (raw_spinlock_t)__RAW_SPIN_LOCK_UNLOCKED;
+        static arch_spinlock_t trace_buf_lock =
+                (arch_spinlock_t)__ARCH_SPIN_LOCK_UNLOCKED;
         static u32 trace_buf[TRACE_BUF_SIZE];
 
         struct ftrace_event_call *call = &event_bprint;
@@ -1283,7 +1298,7 @@ int trace_vbprintk(unsigned long ip, const char *fmt, va_list args)
 
         /* Lockdep uses trace_printk for lock tracing */
         local_irq_save(flags);
-        __raw_spin_lock(&trace_buf_lock);
+        arch_spin_lock(&trace_buf_lock);
         len = vbin_printf(trace_buf, TRACE_BUF_SIZE, fmt, args);
 
         if (len > TRACE_BUF_SIZE || len < 0)
@@ -1304,7 +1319,7 @@ int trace_vbprintk(unsigned long ip, const char *fmt, va_list args)
                 ring_buffer_unlock_commit(buffer, event);
 
 out_unlock:
-        __raw_spin_unlock(&trace_buf_lock);
+        arch_spin_unlock(&trace_buf_lock);
         local_irq_restore(flags);
 
 out:
@@ -1334,7 +1349,7 @@ int trace_array_printk(struct trace_array *tr,
 int trace_array_vprintk(struct trace_array *tr,
                         unsigned long ip, const char *fmt, va_list args)
 {
-        static raw_spinlock_t trace_buf_lock = __RAW_SPIN_LOCK_UNLOCKED;
+        static arch_spinlock_t trace_buf_lock = __ARCH_SPIN_LOCK_UNLOCKED;
         static char trace_buf[TRACE_BUF_SIZE];
 
         struct ftrace_event_call *call = &event_print;
@@ -1360,7 +1375,7 @@ int trace_array_vprintk(struct trace_array *tr,
 
         pause_graph_tracing();
         raw_local_irq_save(irq_flags);
-        __raw_spin_lock(&trace_buf_lock);
+        arch_spin_lock(&trace_buf_lock);
         len = vsnprintf(trace_buf, TRACE_BUF_SIZE, fmt, args);
 
         size = sizeof(*entry) + len + 1;
@@ -1378,7 +1393,7 @@ int trace_array_vprintk(struct trace_array *tr,
                 ring_buffer_unlock_commit(buffer, event);
 
  out_unlock:
-        __raw_spin_unlock(&trace_buf_lock);
+        arch_spin_unlock(&trace_buf_lock);
         raw_local_irq_restore(irq_flags);
         unpause_graph_tracing();
  out:
@@ -2279,7 +2294,7 @@ tracing_cpumask_write(struct file *filp, const char __user *ubuf,
         mutex_lock(&tracing_cpumask_update_lock);
 
         local_irq_disable();
-        __raw_spin_lock(&ftrace_max_lock);
+        arch_spin_lock(&ftrace_max_lock);
         for_each_tracing_cpu(cpu) {
                 /*
                  * Increase/decrease the disabled counter if we are
@@ -2294,7 +2309,7 @@ tracing_cpumask_write(struct file *filp, const char __user *ubuf,
                         atomic_dec(&global_trace.data[cpu]->disabled);
                 }
         }
-        __raw_spin_unlock(&ftrace_max_lock);
+        arch_spin_unlock(&ftrace_max_lock);
         local_irq_enable();
 
         cpumask_copy(tracing_cpumask, tracing_cpumask_new);
@@ -2316,67 +2331,49 @@ static const struct file_operations tracing_cpumask_fops = {
         .write          = tracing_cpumask_write,
 };
 
-static ssize_t
-tracing_trace_options_read(struct file *filp, char __user *ubuf,
-                       size_t cnt, loff_t *ppos)
+static int tracing_trace_options_show(struct seq_file *m, void *v)
 {
         struct tracer_opt *trace_opts;
         u32 tracer_flags;
-        int len = 0;
-        char *buf;
-        int r = 0;
         int i;
 
-
-        /* calculate max size */
-        for (i = 0; trace_options[i]; i++) {
-                len += strlen(trace_options[i]);
-                len += 3; /* "no" and newline */
-        }
-
         mutex_lock(&trace_types_lock);
         tracer_flags = current_trace->flags->val;
         trace_opts = current_trace->flags->opts;
 
-        /*
-         * Increase the size with names of options specific
-         * of the current tracer.
-         */
-        for (i = 0; trace_opts[i].name; i++) {
-                len += strlen(trace_opts[i].name);
-                len += 3; /* "no" and newline */
-        }
-
-        /* +1 for \0 */
-        buf = kmalloc(len + 1, GFP_KERNEL);
-        if (!buf) {
-                mutex_unlock(&trace_types_lock);
-                return -ENOMEM;
-        }
-
         for (i = 0; trace_options[i]; i++) {
                 if (trace_flags & (1 << i))
-                        r += sprintf(buf + r, "%s\n", trace_options[i]);
+                        seq_printf(m, "%s\n", trace_options[i]);
                 else
-                        r += sprintf(buf + r, "no%s\n", trace_options[i]);
+                        seq_printf(m, "no%s\n", trace_options[i]);
         }
 
         for (i = 0; trace_opts[i].name; i++) {
                 if (tracer_flags & trace_opts[i].bit)
-                        r += sprintf(buf + r, "%s\n",
-                                trace_opts[i].name);
+                        seq_printf(m, "%s\n", trace_opts[i].name);
                 else
-                        r += sprintf(buf + r, "no%s\n",
-                                trace_opts[i].name);
+                        seq_printf(m, "no%s\n", trace_opts[i].name);
         }
         mutex_unlock(&trace_types_lock);
 
-        WARN_ON(r >= len + 1);
+        return 0;
+}
 
-        r = simple_read_from_buffer(ubuf, cnt, ppos, buf, r);
+static int __set_tracer_option(struct tracer *trace,
+                               struct tracer_flags *tracer_flags,
+                               struct tracer_opt *opts, int neg)
+{
+        int ret;
 
-        kfree(buf);
-        return r;
+        ret = trace->set_flag(tracer_flags->val, opts->bit, !neg);
+        if (ret)
+                return ret;
+
+        if (neg)
+                tracer_flags->val &= ~opts->bit;
+        else
+                tracer_flags->val |= opts->bit;
+        return 0;
 }
 
 /* Try to assign a tracer specific option */
@@ -2384,33 +2381,17 @@ static int set_tracer_option(struct tracer *trace, char *cmp, int neg)
 {
         struct tracer_flags *tracer_flags = trace->flags;
         struct tracer_opt *opts = NULL;
-        int ret = 0, i = 0;
-        int len;
+        int i;
 
         for (i = 0; tracer_flags->opts[i].name; i++) {
                 opts = &tracer_flags->opts[i];
-                len = strlen(opts->name);
 
-                if (strncmp(cmp, opts->name, len) == 0) {
-                        ret = trace->set_flag(tracer_flags->val,
-                                opts->bit, !neg);
-                        break;
-                }
+                if (strcmp(cmp, opts->name) == 0)
+                        return __set_tracer_option(trace, trace->flags,
+                                                   opts, neg);
         }
-        /* Not found */
-        if (!tracer_flags->opts[i].name)
-                return -EINVAL;
-
-        /* Refused to handle */
-        if (ret)
-                return ret;
-
-        if (neg)
-                tracer_flags->val &= ~opts->bit;
-        else
-                tracer_flags->val |= opts->bit;
 
-        return 0;
+        return -EINVAL;
 }
 
 static void set_tracer_flags(unsigned int mask, int enabled)
@@ -2430,7 +2411,7 @@ tracing_trace_options_write(struct file *filp, const char __user *ubuf,
                         size_t cnt, loff_t *ppos)
 {
         char buf[64];
-        char *cmp = buf;
+        char *cmp;
         int neg = 0;
         int ret;
         int i;
@@ -2442,16 +2423,15 @@ tracing_trace_options_write(struct file *filp, const char __user *ubuf,
                 return -EFAULT;
 
         buf[cnt] = 0;
+        cmp = strstrip(buf);
 
-        if (strncmp(buf, "no", 2) == 0) {
+        if (strncmp(cmp, "no", 2) == 0) {
                 neg = 1;
                 cmp += 2;
         }
 
         for (i = 0; trace_options[i]; i++) {
-                int len = strlen(trace_options[i]);
-
-                if (strncmp(cmp, trace_options[i], len) == 0) {
+                if (strcmp(cmp, trace_options[i]) == 0) {
                         set_tracer_flags(1 << i, !neg);
                         break;
                 }
@@ -2471,9 +2451,18 @@ tracing_trace_options_write(struct file *filp, const char __user *ubuf,
         return cnt;
 }
 
+static int tracing_trace_options_open(struct inode *inode, struct file *file)
+{
+        if (tracing_disabled)
+                return -ENODEV;
+        return single_open(file, tracing_trace_options_show, NULL);
+}
+
 static const struct file_operations tracing_iter_fops = {
-        .open           = tracing_open_generic,
-        .read           = tracing_trace_options_read,
+        .open           = tracing_trace_options_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
         .write          = tracing_trace_options_write,
 };
 
@@ -3133,7 +3122,7 @@ static void tracing_spd_release_pipe(struct splice_pipe_desc *spd,
         __free_page(spd->pages[idx]);
 }
 
-static struct pipe_buf_operations tracing_pipe_buf_ops = {
+static const struct pipe_buf_operations tracing_pipe_buf_ops = {
         .can_merge              = 0,
         .map                    = generic_pipe_buf_map,
         .unmap                  = generic_pipe_buf_unmap,
@@ -3392,21 +3381,18 @@ tracing_mark_write(struct file *filp, const char __user *ubuf,
         return cnt;
 }
 
-static ssize_t tracing_clock_read(struct file *filp, char __user *ubuf,
-                                  size_t cnt, loff_t *ppos)
+static int tracing_clock_show(struct seq_file *m, void *v)
 {
-        char buf[64];
-        int bufiter = 0;
         int i;
 
         for (i = 0; i < ARRAY_SIZE(trace_clocks); i++)
-                bufiter += snprintf(buf + bufiter, sizeof(buf) - bufiter,
+                seq_printf(m,
                         "%s%s%s%s", i ? " " : "",
                         i == trace_clock_id ? "[" : "", trace_clocks[i].name,
                         i == trace_clock_id ? "]" : "");
-        bufiter += snprintf(buf + bufiter, sizeof(buf) - bufiter, "\n");
+        seq_putc(m, '\n');
 
-        return simple_read_from_buffer(ubuf, cnt, ppos, buf, bufiter);
+        return 0;
 }
 
 static ssize_t tracing_clock_write(struct file *filp, const char __user *ubuf,
@@ -3448,6 +3434,13 @@ static ssize_t tracing_clock_write(struct file *filp, const char __user *ubuf,
         return cnt;
 }
 
+static int tracing_clock_open(struct inode *inode, struct file *file)
+{
+        if (tracing_disabled)
+                return -ENODEV;
+        return single_open(file, tracing_clock_show, NULL);
+}
+
 static const struct file_operations tracing_max_lat_fops = {
         .open           = tracing_open_generic,
         .read           = tracing_max_lat_read,
@@ -3486,8 +3479,10 @@ static const struct file_operations tracing_mark_fops = {
 };
 
 static const struct file_operations trace_clock_fops = {
-        .open           = tracing_open_generic,
-        .read           = tracing_clock_read,
+        .open           = tracing_clock_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
         .write          = tracing_clock_write,
 };
 
@@ -3617,7 +3612,7 @@ static void buffer_pipe_buf_get(struct pipe_inode_info *pipe,
 }
 
 /* Pipe buffer operations for a buffer. */
-static struct pipe_buf_operations buffer_pipe_buf_ops = {
+static const struct pipe_buf_operations buffer_pipe_buf_ops = {
         .can_merge              = 0,
         .map                    = generic_pipe_buf_map,
         .unmap                  = generic_pipe_buf_unmap,
@@ -3948,39 +3943,16 @@ trace_options_write(struct file *filp, const char __user *ubuf, size_t cnt,
         if (ret < 0)
                 return ret;
 
-        ret = 0;
-        switch (val) {
-        case 0:
-                /* do nothing if already cleared */
-                if (!(topt->flags->val & topt->opt->bit))
-                        break;
-
-                mutex_lock(&trace_types_lock);
-                if (current_trace->set_flag)
-                        ret = current_trace->set_flag(topt->flags->val,
-                                                      topt->opt->bit, 0);
-                mutex_unlock(&trace_types_lock);
-                if (ret)
-                        return ret;
-                topt->flags->val &= ~topt->opt->bit;
-                break;
-        case 1:
-                /* do nothing if already set */
-                if (topt->flags->val & topt->opt->bit)
-                        break;
+        if (val != 0 && val != 1)
+                return -EINVAL;
 
+        if (!!(topt->flags->val & topt->opt->bit) != val) {
                 mutex_lock(&trace_types_lock);
-                if (current_trace->set_flag)
-                        ret = current_trace->set_flag(topt->flags->val,
-                                                      topt->opt->bit, 1);
+                ret = __set_tracer_option(current_trace, topt->flags,
+                                          topt->opt, !val);
                 mutex_unlock(&trace_types_lock);
                 if (ret)
                         return ret;
-                topt->flags->val |= topt->opt->bit;
-                break;
-
-        default:
-                return -EINVAL;
         }
 
         *ppos += cnt;
@@ -4307,8 +4279,8 @@ trace_printk_seq(struct trace_seq *s)
 
 static void __ftrace_dump(bool disable_tracing)
 {
-        static raw_spinlock_t ftrace_dump_lock =
-                (raw_spinlock_t)__RAW_SPIN_LOCK_UNLOCKED;
+        static arch_spinlock_t ftrace_dump_lock =
+                (arch_spinlock_t)__ARCH_SPIN_LOCK_UNLOCKED;
         /* use static because iter can be a bit big for the stack */
         static struct trace_iterator iter;
         unsigned int old_userobj;
@@ -4318,7 +4290,7 @@ static void __ftrace_dump(bool disable_tracing)
 
         /* only one dump */
         local_irq_save(flags);
-        __raw_spin_lock(&ftrace_dump_lock);
+        arch_spin_lock(&ftrace_dump_lock);
         if (dump_ran)
                 goto out;
 
@@ -4393,7 +4365,7 @@ static void __ftrace_dump(bool disable_tracing)
         }
 
  out:
-        __raw_spin_unlock(&ftrace_dump_lock);
+        arch_spin_unlock(&ftrace_dump_lock);
         local_irq_restore(flags);
 }
 
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index a52bed2eedd8..4df6a77eb196 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -597,18 +597,17 @@ enum trace_iterator_flags {
         TRACE_ITER_BIN                  = 0x40,
         TRACE_ITER_BLOCK                = 0x80,
         TRACE_ITER_STACKTRACE           = 0x100,
-        TRACE_ITER_SCHED_TREE           = 0x200,
-        TRACE_ITER_PRINTK               = 0x400,
-        TRACE_ITER_PREEMPTONLY          = 0x800,
-        TRACE_ITER_BRANCH               = 0x1000,
-        TRACE_ITER_ANNOTATE             = 0x2000,
-        TRACE_ITER_USERSTACKTRACE       = 0x4000,
-        TRACE_ITER_SYM_USEROBJ          = 0x8000,
-        TRACE_ITER_PRINTK_MSGONLY       = 0x10000,
-        TRACE_ITER_CONTEXT_INFO         = 0x20000, /* Print pid/cpu/time */
-        TRACE_ITER_LATENCY_FMT          = 0x40000,
-        TRACE_ITER_SLEEP_TIME           = 0x80000,
-        TRACE_ITER_GRAPH_TIME           = 0x100000,
+        TRACE_ITER_PRINTK               = 0x200,
+        TRACE_ITER_PREEMPTONLY          = 0x400,
+        TRACE_ITER_BRANCH               = 0x800,
+        TRACE_ITER_ANNOTATE             = 0x1000,
+        TRACE_ITER_USERSTACKTRACE       = 0x2000,
+        TRACE_ITER_SYM_USEROBJ          = 0x4000,
+        TRACE_ITER_PRINTK_MSGONLY       = 0x8000,
+        TRACE_ITER_CONTEXT_INFO         = 0x10000, /* Print pid/cpu/time */
+        TRACE_ITER_LATENCY_FMT          = 0x20000,
+        TRACE_ITER_SLEEP_TIME           = 0x40000,
+        TRACE_ITER_GRAPH_TIME           = 0x80000,
 };
 
 /*
diff --git a/kernel/trace/trace_clock.c b/kernel/trace/trace_clock.c
index 878c03f386ba..84a3a7ba072a 100644
--- a/kernel/trace/trace_clock.c
+++ b/kernel/trace/trace_clock.c
@@ -71,10 +71,10 @@ u64 notrace trace_clock(void)
 /* keep prev_time and lock in the same cacheline. */
 static struct {
         u64 prev_time;
-        raw_spinlock_t lock;
+        arch_spinlock_t lock;
 } trace_clock_struct ____cacheline_aligned_in_smp =
         {
-                .lock = (raw_spinlock_t)__RAW_SPIN_LOCK_UNLOCKED,
+                .lock = (arch_spinlock_t)__ARCH_SPIN_LOCK_UNLOCKED,
         };
 
 u64 notrace trace_clock_global(void)
@@ -94,7 +94,7 @@ u64 notrace trace_clock_global(void)
         if (unlikely(in_nmi()))
                 goto out;
 
-        __raw_spin_lock(&trace_clock_struct.lock);
+        arch_spin_lock(&trace_clock_struct.lock);
 
         /*
          * TODO: if this happens often then maybe we should reset
@@ -106,7 +106,7 @@ u64 notrace trace_clock_global(void)
 
         trace_clock_struct.prev_time = now;
 
-        __raw_spin_unlock(&trace_clock_struct.lock);
+        arch_spin_unlock(&trace_clock_struct.lock);
 
  out:
         raw_local_irq_restore(flags);
diff --git a/kernel/trace/trace_event_profile.c b/kernel/trace/trace_event_profile.c
index d9c60f80aa0d..9e25573242cf 100644
--- a/kernel/trace/trace_event_profile.c
+++ b/kernel/trace/trace_event_profile.c
@@ -25,7 +25,7 @@ static int ftrace_profile_enable_event(struct ftrace_event_call *event)
         char *buf;
         int ret = -ENOMEM;
 
-        if (atomic_inc_return(&event->profile_count))
+        if (event->profile_count++ > 0)
                 return 0;
 
         if (!total_profile_count) {
@@ -56,7 +56,7 @@ fail_buf_nmi:
                 perf_trace_buf = NULL;
         }
 fail_buf:
-        atomic_dec(&event->profile_count);
+        event->profile_count--;
 
         return ret;
 }
@@ -83,7 +83,7 @@ static void ftrace_profile_disable_event(struct ftrace_event_call *event)
 {
         char *buf, *nmi_buf;
 
-        if (!atomic_add_negative(-1, &event->profile_count))
+        if (--event->profile_count > 0)
                 return;
 
         event->profile_disable(event);
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 1d18315dc836..189b09baf4fb 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -78,7 +78,7 @@ EXPORT_SYMBOL_GPL(trace_define_field);
         if (ret)                                                        \
                 return ret;
 
-int trace_define_common_fields(struct ftrace_event_call *call)
+static int trace_define_common_fields(struct ftrace_event_call *call)
 {
         int ret;
         struct trace_entry ent;
@@ -91,7 +91,6 @@ int trace_define_common_fields(struct ftrace_event_call *call)
 
         return ret;
 }
-EXPORT_SYMBOL_GPL(trace_define_common_fields);
 
 void trace_destroy_fields(struct ftrace_event_call *call)
 {
@@ -105,9 +104,25 @@ void trace_destroy_fields(struct ftrace_event_call *call)
         }
 }
 
-static void ftrace_event_enable_disable(struct ftrace_event_call *call,
+int trace_event_raw_init(struct ftrace_event_call *call)
+{
+        int id;
+
+        id = register_ftrace_event(call->event);
+        if (!id)
+                return -ENODEV;
+        call->id = id;
+        INIT_LIST_HEAD(&call->fields);
+
+        return 0;
+}
+EXPORT_SYMBOL_GPL(trace_event_raw_init);
+
+static int ftrace_event_enable_disable(struct ftrace_event_call *call,
                                         int enable)
 {
+        int ret = 0;
+
         switch (enable) {
         case 0:
                 if (call->enabled) {
@@ -118,12 +133,20 @@ static void ftrace_event_enable_disable(struct ftrace_event_call *call,
                 break;
         case 1:
                 if (!call->enabled) {
-                        call->enabled = 1;
                         tracing_start_cmdline_record();
-                        call->regfunc(call);
+                        ret = call->regfunc(call);
+                        if (ret) {
+                                tracing_stop_cmdline_record();
+                                pr_info("event trace: Could not enable event "
+                                        "%s\n", call->name);
+                                break;
+                        }
+                        call->enabled = 1;
                 }
                 break;
         }
+
+        return ret;
 }
 
 static void ftrace_clear_events(void)
@@ -402,7 +425,7 @@ event_enable_write(struct file *filp, const char __user *ubuf, size_t cnt,
         case 0:
         case 1:
                 mutex_lock(&event_mutex);
-                ftrace_event_enable_disable(call, val);
+                ret = ftrace_event_enable_disable(call, val);
                 mutex_unlock(&event_mutex);
                 break;
 
@@ -412,7 +435,7 @@ event_enable_write(struct file *filp, const char __user *ubuf, size_t cnt,
 
         *ppos += cnt;
 
-        return cnt;
+        return ret ? ret : cnt;
 }
 
 static ssize_t
@@ -913,7 +936,9 @@ event_create_dir(struct ftrace_event_call *call, struct dentry *d_events,
                                   id);
 
         if (call->define_fields) {
-                ret = call->define_fields(call);
+                ret = trace_define_common_fields(call);
+                if (!ret)
+                        ret = call->define_fields(call);
                 if (ret < 0) {
                         pr_warning("Could not initialize trace point"
                                    " events/%s\n", call->name);
diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c
index 50504cb228de..e42af9aad69f 100644
--- a/kernel/trace/trace_events_filter.c
+++ b/kernel/trace/trace_events_filter.c
@@ -211,8 +211,9 @@ static int filter_pred_pchar(struct filter_pred *pred, void *event,
 {
         char **addr = (char **)(event + pred->offset);
         int cmp, match;
+        int len = strlen(*addr) + 1;    /* including tailing '\0' */
 
-        cmp = pred->regex.match(*addr, &pred->regex, pred->regex.field_len);
+        cmp = pred->regex.match(*addr, &pred->regex, len);
 
         match = cmp ^ pred->not;
 
@@ -251,7 +252,18 @@ static int filter_pred_none(struct filter_pred *pred, void *event,
         return 0;
 }
 
-/* Basic regex callbacks */
+/*
+ * regex_match_foo - Basic regex callbacks
+ *
+ * @str: the string to be searched
+ * @r:   the regex structure containing the pattern string
+ * @len: the length of the string to be searched (including '\0')
+ *
+ * Note:
+ * - @str might not be NULL-terminated if it's of type DYN_STRING
+ *   or STATIC_STRING
+ */
+
 static int regex_match_full(char *str, struct regex *r, int len)
 {
         if (strncmp(str, r->pattern, len) == 0)
@@ -261,23 +273,24 @@ static int regex_match_full(char *str, struct regex *r, int len)
 
 static int regex_match_front(char *str, struct regex *r, int len)
 {
-        if (strncmp(str, r->pattern, len) == 0)
+        if (strncmp(str, r->pattern, r->len) == 0)
                 return 1;
         return 0;
 }
 
 static int regex_match_middle(char *str, struct regex *r, int len)
 {
-        if (strstr(str, r->pattern))
+        if (strnstr(str, r->pattern, len))
                 return 1;
         return 0;
 }
 
 static int regex_match_end(char *str, struct regex *r, int len)
 {
-        char *ptr = strstr(str, r->pattern);
+        int strlen = len - 1;
 
-        if (ptr && (ptr[r->len] == 0))
+        if (strlen >= r->len &&
+            memcmp(str + strlen - r->len, r->pattern, r->len) == 0)
                 return 1;
         return 0;
 }
@@ -781,10 +794,8 @@ static int filter_add_pred(struct filter_parse_state *ps,
                         pred->regex.field_len = field->size;
                 } else if (field->filter_type == FILTER_DYN_STRING)
                         fn = filter_pred_strloc;
-                else {
+                else
                         fn = filter_pred_pchar;
-                        pred->regex.field_len = strlen(pred->regex.pattern);
-                }
         } else {
                 if (field->is_signed)
                         ret = strict_strtoll(pred->regex.pattern, 0, &val);
diff --git a/kernel/trace/trace_export.c b/kernel/trace/trace_export.c
index dff8c84ddf17..d4fa5dc1ee4e 100644
--- a/kernel/trace/trace_export.c
+++ b/kernel/trace/trace_export.c
@@ -158,7 +158,8 @@ ftrace_format_##name(struct ftrace_event_call *unused,			\
         BUILD_BUG_ON(len > MAX_FILTER_STR_VAL);                         \
         ret = trace_define_field(event_call, #type "[" #len "]", #item, \
                                  offsetof(typeof(field), item),         \
-                                 sizeof(field.item), 0, FILTER_OTHER);  \
+                                 sizeof(field.item),                    \
+                                 is_signed_type(type), FILTER_OTHER);   \
         if (ret)                                                        \
                 return ret;
 
@@ -168,8 +169,8 @@ ftrace_format_##name(struct ftrace_event_call *unused,			\
         ret = trace_define_field(event_call, #type "[" #len "]", #item, \
                                  offsetof(typeof(field),                \
                                           container.item),              \
-                                 sizeof(field.container.item), 0,       \
-                                 FILTER_OTHER);                         \
+                                 sizeof(field.container.item),          \
+                                 is_signed_type(type), FILTER_OTHER);   \
         if (ret)                                                        \
                 return ret;
 
@@ -184,10 +185,6 @@ ftrace_define_fields_##name(struct ftrace_event_call *event_call)	\
         struct struct_name field;                                       \
         int ret;                                                        \
                                                                         \
-        ret = trace_define_common_fields(event_call);                   \
-        if (ret)                                                        \
-                return ret;                                             \
-                                                                        \
         tstruct;                                                        \
                                                                         \
         return ret;                                                     \
diff --git a/kernel/trace/trace_irqsoff.c b/kernel/trace/trace_irqsoff.c
index 3aa7eaa2114c..2974bc7538c7 100644
--- a/kernel/trace/trace_irqsoff.c
+++ b/kernel/trace/trace_irqsoff.c
@@ -151,6 +151,8 @@ check_critical_timing(struct trace_array *tr,
                 goto out_unlock;
 
         trace_function(tr, CALLER_ADDR0, parent_ip, flags, pc);
+        /* Skip 5 functions to get to the irq/preempt enable function */
+        __trace_stack(tr, flags, 5, pc);
 
         if (data->critical_sequence != max_sequence)
                 goto out_unlock;
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index b52d397e57eb..6ea90c0e2c96 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -282,6 +282,18 @@ static int kprobe_dispatcher(struct kprobe *kp, struct pt_regs *regs);
 static int kretprobe_dispatcher(struct kretprobe_instance *ri,
                                 struct pt_regs *regs);
 
+/* Check the name is good for event/group */
+static int check_event_name(const char *name)
+{
+        if (!isalpha(*name) && *name != '_')
+                return 0;
+        while (*++name != '\0') {
+                if (!isalpha(*name) && !isdigit(*name) && *name != '_')
+                        return 0;
+        }
+        return 1;
+}
+
 /*
  * Allocate new trace_probe and initialize it (including kprobes).
  */
@@ -293,10 +305,11 @@ static struct trace_probe *alloc_trace_probe(const char *group,
                                              int nargs, int is_return)
 {
         struct trace_probe *tp;
+        int ret = -ENOMEM;
 
         tp = kzalloc(SIZEOF_TRACE_PROBE(nargs), GFP_KERNEL);
         if (!tp)
-                return ERR_PTR(-ENOMEM);
+                return ERR_PTR(ret);
 
         if (symbol) {
                 tp->symbol = kstrdup(symbol, GFP_KERNEL);
@@ -312,14 +325,20 @@ static struct trace_probe *alloc_trace_probe(const char *group,
         else
                 tp->rp.kp.pre_handler = kprobe_dispatcher;
 
-        if (!event)
+        if (!event || !check_event_name(event)) {
+                ret = -EINVAL;
                 goto error;
+        }
+
         tp->call.name = kstrdup(event, GFP_KERNEL);
         if (!tp->call.name)
                 goto error;
 
-        if (!group)
+        if (!group || !check_event_name(group)) {
+                ret = -EINVAL;
                 goto error;
+        }
+
         tp->call.system = kstrdup(group, GFP_KERNEL);
         if (!tp->call.system)
                 goto error;
@@ -330,7 +349,7 @@ error:
         kfree(tp->call.name);
         kfree(tp->symbol);
         kfree(tp);
-        return ERR_PTR(-ENOMEM);
+        return ERR_PTR(ret);
 }
 
 static void free_probe_arg(struct probe_arg *arg)
@@ -695,10 +714,10 @@ static int create_trace_probe(int argc, char **argv)
         if (!event) {
                 /* Make a new event name */
                 if (symbol)
-                        snprintf(buf, MAX_EVENT_NAME_LEN, "%c@%s%+ld",
+                        snprintf(buf, MAX_EVENT_NAME_LEN, "%c_%s_%ld",
                                  is_return ? 'r' : 'p', symbol, offset);
                 else
-                        snprintf(buf, MAX_EVENT_NAME_LEN, "%c@0x%p",
+                        snprintf(buf, MAX_EVENT_NAME_LEN, "%c_0x%p",
                                  is_return ? 'r' : 'p', addr);
                 event = buf;
         }
@@ -1132,10 +1151,6 @@ static int kprobe_event_define_fields(struct ftrace_event_call *event_call)
         struct kprobe_trace_entry field;
         struct trace_probe *tp = (struct trace_probe *)event_call->data;
 
-        ret = trace_define_common_fields(event_call);
-        if (ret)
-                return ret;
-
         DEFINE_FIELD(unsigned long, ip, FIELD_STRING_IP, 0);
         DEFINE_FIELD(int, nargs, FIELD_STRING_NARGS, 1);
         /* Set argument names as fields */
@@ -1150,10 +1165,6 @@ static int kretprobe_event_define_fields(struct ftrace_event_call *event_call)
         struct kretprobe_trace_entry field;
         struct trace_probe *tp = (struct trace_probe *)event_call->data;
 
-        ret = trace_define_common_fields(event_call);
-        if (ret)
-                return ret;
-
         DEFINE_FIELD(unsigned long, func, FIELD_STRING_FUNC, 0);
         DEFINE_FIELD(unsigned long, ret_ip, FIELD_STRING_RETIP, 0);
         DEFINE_FIELD(int, nargs, FIELD_STRING_NARGS, 1);
@@ -1190,10 +1201,11 @@ static int __probe_event_show_format(struct trace_seq *s,
 #undef SHOW_FIELD
 #define SHOW_FIELD(type, item, name)                                    \
         do {                                                            \
-                ret = trace_seq_printf(s, "\tfield: " #type " %s;\t"    \
-                                "offset:%u;\tsize:%u;\n", name,         \
+                ret = trace_seq_printf(s, "\tfield:" #type " %s;\t"     \
+                                "offset:%u;\tsize:%u;\tsigned:%d;\n", name,\
                                 (unsigned int)offsetof(typeof(field), item),\
-                                (unsigned int)sizeof(type));            \
+                                (unsigned int)sizeof(type),             \
+                                is_signed_type(type));                  \
                 if (!ret)                                               \
                         return 0;                                       \
         } while (0)
@@ -1453,7 +1465,6 @@ static int register_probe_event(struct trace_probe *tp)
         call->unregfunc = probe_event_disable;
 
 #ifdef CONFIG_EVENT_PROFILE
-        atomic_set(&call->profile_count, -1);
         call->profile_enable = probe_profile_enable;
         call->profile_disable = probe_profile_disable;
 #endif
diff --git a/kernel/trace/trace_ksym.c b/kernel/trace/trace_ksym.c
index acb87d4a4ac1..94103cdcf9d8 100644
--- a/kernel/trace/trace_ksym.c
+++ b/kernel/trace/trace_ksym.c
@@ -26,12 +26,13 @@
 #include <linux/fs.h>
 
 #include "trace_output.h"
-#include "trace_stat.h"
 #include "trace.h"
 
 #include <linux/hw_breakpoint.h>
 #include <asm/hw_breakpoint.h>
 
+#include <asm/atomic.h>
+
 /*
  * For now, let us restrict the no. of symbols traced simultaneously to number
  * of available hardware breakpoint registers.
@@ -44,7 +45,7 @@ struct trace_ksym {
         struct perf_event       **ksym_hbp;
         struct perf_event_attr  attr;
 #ifdef CONFIG_PROFILE_KSYM_TRACER
-        unsigned long           counter;
+        atomic64_t              counter;
 #endif
         struct hlist_node       ksym_hlist;
 };
@@ -69,9 +70,8 @@ void ksym_collect_stats(unsigned long hbp_hit_addr)
 
         rcu_read_lock();
         hlist_for_each_entry_rcu(entry, node, &ksym_filter_head, ksym_hlist) {
-                if ((entry->attr.bp_addr == hbp_hit_addr) &&
-                    (entry->counter <= MAX_UL_INT)) {
-                        entry->counter++;
+                if (entry->attr.bp_addr == hbp_hit_addr) {
+                        atomic64_inc(&entry->counter);
                         break;
                 }
         }
@@ -197,7 +197,6 @@ int process_new_ksym_entry(char *ksymname, int op, unsigned long addr)
         entry->attr.bp_addr = addr;
         entry->attr.bp_len = HW_BREAKPOINT_LEN_4;
 
-        ret = -EAGAIN;
         entry->ksym_hbp = register_wide_hw_breakpoint(&entry->attr,
                                         ksym_hbp_handler);
 
@@ -236,7 +235,8 @@ static ssize_t ksym_trace_filter_read(struct file *filp, char __user *ubuf,
         mutex_lock(&ksym_tracer_mutex);
 
         hlist_for_each_entry(entry, node, &ksym_filter_head, ksym_hlist) {
-                ret = trace_seq_printf(s, "%pS:", (void *)entry->attr.bp_addr);
+                ret = trace_seq_printf(s, "%pS:",
+                                (void *)(unsigned long)entry->attr.bp_addr);
                 if (entry->attr.bp_type == HW_BREAKPOINT_R)
                         ret = trace_seq_puts(s, "r--\n");
                 else if (entry->attr.bp_type == HW_BREAKPOINT_W)
@@ -278,21 +278,20 @@ static ssize_t ksym_trace_filter_write(struct file *file,
 {
         struct trace_ksym *entry;
         struct hlist_node *node;
-        char *input_string, *ksymname = NULL;
+        char *buf, *input_string, *ksymname = NULL;
         unsigned long ksym_addr = 0;
         int ret, op, changed = 0;
 
-        input_string = kzalloc(count + 1, GFP_KERNEL);
-        if (!input_string)
+        buf = kzalloc(count + 1, GFP_KERNEL);
+        if (!buf)
                 return -ENOMEM;
 
-        if (copy_from_user(input_string, buffer, count)) {
-                kfree(input_string);
-                return -EFAULT;
-        }
-        input_string[count] = '\0';
+        ret = -EFAULT;
+        if (copy_from_user(buf, buffer, count))
+                goto out;
 
-        strstrip(input_string);
+        buf[count] = '\0';
+        input_string = strstrip(buf);
 
         /*
          * Clear all breakpoints if:
@@ -303,15 +302,13 @@ static ssize_t ksym_trace_filter_write(struct file *file,
         if (!input_string[0] || !strcmp(input_string, "0") ||
             !strcmp(input_string, "*:---")) {
                 __ksym_trace_reset();
-                kfree(input_string);
-                return count;
+                ret = 0;
+                goto out;
         }
 
         ret = op = parse_ksym_trace_str(input_string, &ksymname, &ksym_addr);
-        if (ret < 0) {
-                kfree(input_string);
-                return ret;
-        }
+        if (ret < 0)
+                goto out;
 
         mutex_lock(&ksym_tracer_mutex);
 
@@ -322,7 +319,7 @@ static ssize_t ksym_trace_filter_write(struct file *file,
                         if (entry->attr.bp_type != op)
                                 changed = 1;
                         else
-                                goto out;
+                                goto out_unlock;
                         break;
                 }
         }
@@ -337,28 +334,24 @@ static ssize_t ksym_trace_filter_write(struct file *file,
                         if (IS_ERR(entry->ksym_hbp))
                                 ret = PTR_ERR(entry->ksym_hbp);
                         else
-                                goto out;
+                                goto out_unlock;
                 }
                 /* Error or "symbol:---" case: drop it */
                 ksym_filter_entry_count--;
                 hlist_del_rcu(&(entry->ksym_hlist));
                 synchronize_rcu();
                 kfree(entry);
-                goto out;
+                goto out_unlock;
         } else {
                 /* Check for malformed request: (4) */
-                if (op == 0)
-                        goto out;
-                ret = process_new_ksym_entry(ksymname, op, ksym_addr);
+                if (op)
+                        ret = process_new_ksym_entry(ksymname, op, ksym_addr);
         }
-out:
+out_unlock:
         mutex_unlock(&ksym_tracer_mutex);
-
-        kfree(input_string);
-
-        if (!ret)
-                ret = count;
-        return ret;
+out:
+        kfree(buf);
+        return !ret ? count : ret;
 }
 
 static const struct file_operations ksym_tracing_fops = {
@@ -450,102 +443,77 @@ struct tracer ksym_tracer __read_mostly =
         .print_line     = ksym_trace_output
 };
 
-__init static int init_ksym_trace(void)
-{
-        struct dentry *d_tracer;
-        struct dentry *entry;
-
-        d_tracer = tracing_init_dentry();
-        ksym_filter_entry_count = 0;
-
-        entry = debugfs_create_file("ksym_trace_filter", 0644, d_tracer,
-                                    NULL, &ksym_tracing_fops);
-        if (!entry)
-                pr_warning("Could not create debugfs "
-                           "'ksym_trace_filter' file\n");
-
-        return register_tracer(&ksym_tracer);
-}
-device_initcall(init_ksym_trace);
-
-
 #ifdef CONFIG_PROFILE_KSYM_TRACER
-static int ksym_tracer_stat_headers(struct seq_file *m)
+static int ksym_profile_show(struct seq_file *m, void *v)
 {
+        struct hlist_node *node;
+        struct trace_ksym *entry;
+        int access_type = 0;
+        char fn_name[KSYM_NAME_LEN];
+
         seq_puts(m, "  Access Type ");
         seq_puts(m, "  Symbol                                       Counter\n");
         seq_puts(m, "  ----------- ");
         seq_puts(m, "  ------                                       -------\n");
-        return 0;
-}
 
-static int ksym_tracer_stat_show(struct seq_file *m, void *v)
-{
-        struct hlist_node *stat = v;
-        struct trace_ksym *entry;
-        int access_type = 0;
-        char fn_name[KSYM_NAME_LEN];
+        rcu_read_lock();
+        hlist_for_each_entry_rcu(entry, node, &ksym_filter_head, ksym_hlist) {
 
-        entry = hlist_entry(stat, struct trace_ksym, ksym_hlist);
+                access_type = entry->attr.bp_type;
 
-        access_type = entry->attr.bp_type;
+                switch (access_type) {
+                case HW_BREAKPOINT_R:
+                        seq_puts(m, "  R           ");
+                        break;
+                case HW_BREAKPOINT_W:
+                        seq_puts(m, "  W           ");
+                        break;
+                case HW_BREAKPOINT_R | HW_BREAKPOINT_W:
+                        seq_puts(m, "  RW          ");
+                        break;
+                default:
+                        seq_puts(m, "  NA          ");
+                }
 
-        switch (access_type) {
-        case HW_BREAKPOINT_R:
-                seq_puts(m, "  R           ");
-                break;
-        case HW_BREAKPOINT_W:
-                seq_puts(m, "  W           ");
-                break;
-        case HW_BREAKPOINT_R | HW_BREAKPOINT_W:
-                seq_puts(m, "  RW          ");
-                break;
-        default:
-                seq_puts(m, "  NA          ");
+                if (lookup_symbol_name(entry->attr.bp_addr, fn_name) >= 0)
+                        seq_printf(m, "  %-36s", fn_name);
+                else
+                        seq_printf(m, "  %-36s", "<NA>");
+                seq_printf(m, " %15llu\n",
+                           (unsigned long long)atomic64_read(&entry->counter));
         }
-
-        if (lookup_symbol_name(entry->attr.bp_addr, fn_name) >= 0)
-                seq_printf(m, "  %-36s", fn_name);
-        else
-                seq_printf(m, "  %-36s", "<NA>");
-        seq_printf(m, " %15lu\n", entry->counter);
+        rcu_read_unlock();
 
         return 0;
 }
 
-static void *ksym_tracer_stat_start(struct tracer_stat *trace)
+static int ksym_profile_open(struct inode *node, struct file *file)
 {
-        return ksym_filter_head.first;
+        return single_open(file, ksym_profile_show, NULL);
 }
 
-static void *
-ksym_tracer_stat_next(void *v, int idx)
-{
-        struct hlist_node *stat = v;
-
-        return stat->next;
-}
-
-static struct tracer_stat ksym_tracer_stats = {
-        .name = "ksym_tracer",
-        .stat_start = ksym_tracer_stat_start,
-        .stat_next = ksym_tracer_stat_next,
-        .stat_headers = ksym_tracer_stat_headers,
-        .stat_show = ksym_tracer_stat_show
+static const struct file_operations ksym_profile_fops = {
+        .open           = ksym_profile_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
 };
+#endif /* CONFIG_PROFILE_KSYM_TRACER */
 
-__init static int ksym_tracer_stat_init(void)
+__init static int init_ksym_trace(void)
 {
-        int ret;
+        struct dentry *d_tracer;
 
-        ret = register_stat_tracer(&ksym_tracer_stats);
-        if (ret) {
-                printk(KERN_WARNING "Warning: could not register "
-                                    "ksym tracer stats\n");
-                return 1;
-        }
+        d_tracer = tracing_init_dentry();
 
-        return 0;
+        trace_create_file("ksym_trace_filter", 0644, d_tracer,
+                          NULL, &ksym_tracing_fops);
+
+#ifdef CONFIG_PROFILE_KSYM_TRACER
+        trace_create_file("ksym_profile", 0444, d_tracer,
+                          NULL, &ksym_profile_fops);
+#endif
+
+        return register_tracer(&ksym_tracer);
 }
-fs_initcall(ksym_tracer_stat_init);
-#endif /* CONFIG_PROFILE_KSYM_TRACER */
+device_initcall(init_ksym_trace);
diff --git a/kernel/trace/trace_sched_wakeup.c b/kernel/trace/trace_sched_wakeup.c
index 26185d727676..0271742abb8d 100644
--- a/kernel/trace/trace_sched_wakeup.c
+++ b/kernel/trace/trace_sched_wakeup.c
@@ -28,8 +28,8 @@ static int			wakeup_current_cpu;
 static unsigned                 wakeup_prio = -1;
 static int                      wakeup_rt;
 
-static raw_spinlock_t wakeup_lock =
-        (raw_spinlock_t)__RAW_SPIN_LOCK_UNLOCKED;
+static arch_spinlock_t wakeup_lock =
+        (arch_spinlock_t)__ARCH_SPIN_LOCK_UNLOCKED;
 
 static void __wakeup_reset(struct trace_array *tr);
 
@@ -143,7 +143,7 @@ probe_wakeup_sched_switch(struct rq *rq, struct task_struct *prev,
                 goto out;
 
         local_irq_save(flags);
-        __raw_spin_lock(&wakeup_lock);
+        arch_spin_lock(&wakeup_lock);
 
         /* We could race with grabbing wakeup_lock */
         if (unlikely(!tracer_enabled || next != wakeup_task))
@@ -169,7 +169,7 @@ probe_wakeup_sched_switch(struct rq *rq, struct task_struct *prev,
 
 out_unlock:
         __wakeup_reset(wakeup_trace);
-        __raw_spin_unlock(&wakeup_lock);
+        arch_spin_unlock(&wakeup_lock);
         local_irq_restore(flags);
 out:
         atomic_dec(&wakeup_trace->data[cpu]->disabled);
@@ -193,9 +193,9 @@ static void wakeup_reset(struct trace_array *tr)
         tracing_reset_online_cpus(tr);
 
         local_irq_save(flags);
-        __raw_spin_lock(&wakeup_lock);
+        arch_spin_lock(&wakeup_lock);
         __wakeup_reset(tr);
-        __raw_spin_unlock(&wakeup_lock);
+        arch_spin_unlock(&wakeup_lock);
         local_irq_restore(flags);
 }
 
@@ -225,7 +225,7 @@ probe_wakeup(struct rq *rq, struct task_struct *p, int success)
                 goto out;
 
         /* interrupts should be off from try_to_wake_up */
-        __raw_spin_lock(&wakeup_lock);
+        arch_spin_lock(&wakeup_lock);
 
         /* check for races. */
         if (!tracer_enabled || p->prio >= wakeup_prio)
@@ -255,7 +255,7 @@ probe_wakeup(struct rq *rq, struct task_struct *p, int success)
         trace_function(wakeup_trace, CALLER_ADDR1, CALLER_ADDR2, flags, pc);
 
 out_locked:
-        __raw_spin_unlock(&wakeup_lock);
+        arch_spin_unlock(&wakeup_lock);
 out:
         atomic_dec(&wakeup_trace->data[cpu]->disabled);
 }
diff --git a/kernel/trace/trace_selftest.c b/kernel/trace/trace_selftest.c
index dc98309e839a..280fea470d67 100644
--- a/kernel/trace/trace_selftest.c
+++ b/kernel/trace/trace_selftest.c
@@ -67,7 +67,7 @@ static int trace_test_buffer(struct trace_array *tr, unsigned long *count)
 
         /* Don't allow flipping of max traces now */
         local_irq_save(flags);
-        __raw_spin_lock(&ftrace_max_lock);
+        arch_spin_lock(&ftrace_max_lock);
 
         cnt = ring_buffer_entries(tr->buffer);
 
@@ -85,7 +85,7 @@ static int trace_test_buffer(struct trace_array *tr, unsigned long *count)
                         break;
         }
         tracing_on();
-        __raw_spin_unlock(&ftrace_max_lock);
+        arch_spin_unlock(&ftrace_max_lock);
         local_irq_restore(flags);
 
         if (count)
diff --git a/kernel/trace/trace_stack.c b/kernel/trace/trace_stack.c
index 8504ac71e4e8..678a5120ee30 100644
--- a/kernel/trace/trace_stack.c
+++ b/kernel/trace/trace_stack.c
@@ -27,8 +27,8 @@ static struct stack_trace max_stack_trace = {
 };
 
 static unsigned long max_stack_size;
-static raw_spinlock_t max_stack_lock =
-        (raw_spinlock_t)__RAW_SPIN_LOCK_UNLOCKED;
+static arch_spinlock_t max_stack_lock =
+        (arch_spinlock_t)__ARCH_SPIN_LOCK_UNLOCKED;
 
 static int stack_trace_disabled __read_mostly;
 static DEFINE_PER_CPU(int, trace_active);
@@ -54,7 +54,7 @@ static inline void check_stack(void)
                 return;
 
         local_irq_save(flags);
-        __raw_spin_lock(&max_stack_lock);
+        arch_spin_lock(&max_stack_lock);
 
         /* a race could have already updated it */
         if (this_size <= max_stack_size)
@@ -103,7 +103,7 @@ static inline void check_stack(void)
         }
 
  out:
-        __raw_spin_unlock(&max_stack_lock);
+        arch_spin_unlock(&max_stack_lock);
         local_irq_restore(flags);
 }
 
@@ -171,9 +171,9 @@ stack_max_size_write(struct file *filp, const char __user *ubuf,
                 return ret;
 
         local_irq_save(flags);
-        __raw_spin_lock(&max_stack_lock);
+        arch_spin_lock(&max_stack_lock);
         *ptr = val;
-        __raw_spin_unlock(&max_stack_lock);
+        arch_spin_unlock(&max_stack_lock);
         local_irq_restore(flags);
 
         return count;
@@ -207,7 +207,7 @@ t_next(struct seq_file *m, void *v, loff_t *pos)
 static void *t_start(struct seq_file *m, loff_t *pos)
 {
         local_irq_disable();
-        __raw_spin_lock(&max_stack_lock);
+        arch_spin_lock(&max_stack_lock);
 
         if (*pos == 0)
                 return SEQ_START_TOKEN;
@@ -217,7 +217,7 @@ static void *t_start(struct seq_file *m, loff_t *pos)
 
 static void t_stop(struct seq_file *m, void *p)
 {
-        __raw_spin_unlock(&max_stack_lock);
+        arch_spin_unlock(&max_stack_lock);
         local_irq_enable();
 }
 
diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c
index 57501d90096a..75289f372dd2 100644
--- a/kernel/trace/trace_syscalls.c
+++ b/kernel/trace/trace_syscalls.c
@@ -217,10 +217,6 @@ int syscall_enter_define_fields(struct ftrace_event_call *call)
         int i;
         int offset = offsetof(typeof(trace), args);
 
-        ret = trace_define_common_fields(call);
-        if (ret)
-                return ret;
-
         ret = trace_define_field(call, SYSCALL_FIELD(int, nr), FILTER_OTHER);
         if (ret)
                 return ret;
@@ -241,10 +237,6 @@ int syscall_exit_define_fields(struct ftrace_event_call *call)
         struct syscall_trace_exit trace;
         int ret;
 
-        ret = trace_define_common_fields(call);
-        if (ret)
-                return ret;
-
         ret = trace_define_field(call, SYSCALL_FIELD(int, nr), FILTER_OTHER);
         if (ret)
                 return ret;
@@ -333,10 +325,7 @@ int reg_event_syscall_enter(struct ftrace_event_call *call)
         mutex_lock(&syscall_trace_lock);
         if (!sys_refcount_enter)
                 ret = register_trace_sys_enter(ftrace_syscall_enter);
-        if (ret) {
-                pr_info("event trace: Could not activate"
-                                "syscall entry trace point");
-        } else {
+        if (!ret) {
                 set_bit(num, enabled_enter_syscalls);
                 sys_refcount_enter++;
         }
@@ -370,10 +359,7 @@ int reg_event_syscall_exit(struct ftrace_event_call *call)
         mutex_lock(&syscall_trace_lock);
         if (!sys_refcount_exit)
                 ret = register_trace_sys_exit(ftrace_syscall_exit);
-        if (ret) {
-                pr_info("event trace: Could not activate"
-                                "syscall exit trace point");
-        } else {
+        if (!ret) {
                 set_bit(num, enabled_exit_syscalls);
                 sys_refcount_exit++;
         }
diff --git a/kernel/trace/trace_sysprof.c b/kernel/trace/trace_sysprof.c
index f6693969287d..a7974a552ca9 100644
--- a/kernel/trace/trace_sysprof.c
+++ b/kernel/trace/trace_sysprof.c
@@ -93,6 +93,7 @@ static const struct stacktrace_ops backtrace_ops = {
         .warning_symbol         = backtrace_warning_symbol,
         .stack                  = backtrace_stack,
         .address                = backtrace_address,
+        .walk_stack             = print_context_stack,
 };
 
 static int