Merge commit 'v2.6.32-rc6' into perf/core

[safe/jmp/linux-2.6] / kernel / trace / ring_buffer.c

diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index 1766c0e..63446f1 100644 (file)
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -201,8 +201,6 @@ int tracing_is_on(void)
 }
 EXPORT_SYMBOL_GPL(tracing_is_on);
 
-#include "trace.h"
-
 #define RB_EVNT_HDR_SIZE (offsetof(struct ring_buffer_event, array))
 #define RB_ALIGNMENT           4U
 #define RB_MAX_SMALL_DATA      (RB_ALIGNMENT * RINGBUF_TYPE_DATA_TYPE_LEN_MAX)
@@ -399,18 +397,21 @@ int ring_buffer_print_page_header(struct trace_seq *s)
        int ret;
 
        ret = trace_seq_printf(s, "\tfield: u64 timestamp;\t"
-                              "offset:0;\tsize:%u;\n",
-                              (unsigned int)sizeof(field.time_stamp));
+                              "offset:0;\tsize:%u;\tsigned:%u;\n",
+                              (unsigned int)sizeof(field.time_stamp),
+                              (unsigned int)is_signed_type(u64));
 
        ret = trace_seq_printf(s, "\tfield: local_t commit;\t"
-                              "offset:%u;\tsize:%u;\n",
+                              "offset:%u;\tsize:%u;\tsigned:%u;\n",
                               (unsigned int)offsetof(typeof(field), commit),
-                              (unsigned int)sizeof(field.commit));
+                              (unsigned int)sizeof(field.commit),
+                              (unsigned int)is_signed_type(long));
 
        ret = trace_seq_printf(s, "\tfield: char data;\t"
-                              "offset:%u;\tsize:%u;\n",
+                              "offset:%u;\tsize:%u;\tsigned:%u;\n",
                               (unsigned int)offsetof(typeof(field), data),
-                              (unsigned int)BUF_PAGE_SIZE);
+                              (unsigned int)BUF_PAGE_SIZE,
+                              (unsigned int)is_signed_type(char));
 
        return ret;
 }
@@ -485,7 +486,7 @@ struct ring_buffer_iter {
 /* Up this if you want to test the TIME_EXTENTS and normalization */
 #define DEBUG_SHIFT 0
 
-static inline u64 rb_time_stamp(struct ring_buffer *buffer, int cpu)
+static inline u64 rb_time_stamp(struct ring_buffer *buffer)
 {
        /* shift to debug/test normalization and TIME_EXTENTS */
        return buffer->clock() << DEBUG_SHIFT;
@@ -496,7 +497,7 @@ u64 ring_buffer_time_stamp(struct ring_buffer *buffer, int cpu)
        u64 time;
 
        preempt_disable_notrace();
-       time = rb_time_stamp(buffer, cpu);
+       time = rb_time_stamp(buffer);
        preempt_enable_no_resched_notrace();
 
        return time;
@@ -601,7 +602,7 @@ static struct list_head *rb_list_head(struct list_head *list)
 }
 
 /*
- * rb_is_head_page - test if the give page is the head page
+ * rb_is_head_page - test if the given page is the head page
  *
  * Because the reader may move the head_page pointer, we can
  * not trust what the head page is (it may be pointing to
@@ -701,8 +702,8 @@ static int rb_head_page_set(struct ring_buffer_per_cpu *cpu_buffer,
 
        val &= ~RB_FLAG_MASK;
 
-       ret = (unsigned long)cmpxchg(&list->next,
-                                    val | old_flag, val | new_flag);
+       ret = cmpxchg((unsigned long *)&list->next,
+                     val | old_flag, val | new_flag);
 
        /* check if the reader took the page */
        if ((ret & ~RB_FLAG_MASK) != val)
@@ -794,7 +795,7 @@ static int rb_head_page_replace(struct buffer_page *old,
        val = *ptr & ~RB_FLAG_MASK;
        val |= RB_PAGE_HEAD;
 
-       ret = cmpxchg(ptr, val, &new->list);
+       ret = cmpxchg(ptr, val, (unsigned long)&new->list);
 
        return ret == val;
 }
@@ -1870,7 +1871,7 @@ rb_move_tail(struct ring_buffer_per_cpu *cpu_buffer,
                 * Nested commits always have zero deltas, so
                 * just reread the time stamp
                 */
-               *ts = rb_time_stamp(buffer, cpu_buffer->cpu);
+               *ts = rb_time_stamp(buffer);
                next_page->page->time_stamp = *ts;
        }
 
@@ -2084,6 +2085,7 @@ rb_reserve_next_event(struct ring_buffer *buffer,
 
        rb_start_commit(cpu_buffer);
 
+#ifdef CONFIG_RING_BUFFER_ALLOW_SWAP
        /*
         * Due to the ability to swap a cpu buffer from a buffer
         * it is possible it was swapped before we committed.
@@ -2096,6 +2098,7 @@ rb_reserve_next_event(struct ring_buffer *buffer,
                local_dec(&cpu_buffer->commits);
                return NULL;
        }
+#endif
 
        length = rb_calculate_event_length(length);
  again:
@@ -2111,7 +2114,7 @@ rb_reserve_next_event(struct ring_buffer *buffer,
        if (RB_WARN_ON(cpu_buffer, ++nr_loops > 1000))
                goto out_fail;
 
-       ts = rb_time_stamp(cpu_buffer->buffer, cpu_buffer->cpu);
+       ts = rb_time_stamp(cpu_buffer->buffer);
 
        /*
         * Only the first commit can update the timestamp.
@@ -2681,7 +2684,7 @@ unsigned long ring_buffer_entries(struct ring_buffer *buffer)
 EXPORT_SYMBOL_GPL(ring_buffer_entries);
 
 /**
- * ring_buffer_overrun_cpu - get the number of overruns in buffer
+ * ring_buffer_overruns - get the number of overruns in buffer
  * @buffer: The ring buffer
  *
  * Returns the total number of overruns in the ring buffer
@@ -2995,15 +2998,12 @@ static void rb_advance_iter(struct ring_buffer_iter *iter)
 }
 
 static struct ring_buffer_event *
-rb_buffer_peek(struct ring_buffer *buffer, int cpu, u64 *ts)
+rb_buffer_peek(struct ring_buffer_per_cpu *cpu_buffer, u64 *ts)
 {
-       struct ring_buffer_per_cpu *cpu_buffer;
        struct ring_buffer_event *event;
        struct buffer_page *reader;
        int nr_loops = 0;
 
-       cpu_buffer = buffer->buffers[cpu];
-
  again:
        /*
         * We repeat when a timestamp is encountered. It is possible
@@ -3047,7 +3047,7 @@ rb_buffer_peek(struct ring_buffer *buffer, int cpu, u64 *ts)
        case RINGBUF_TYPE_DATA:
                if (ts) {
                        *ts = cpu_buffer->read_stamp + event->time_delta;
-                       ring_buffer_normalize_time_stamp(buffer,
+                       ring_buffer_normalize_time_stamp(cpu_buffer->buffer,
                                                         cpu_buffer->cpu, ts);
                }
                return event;
@@ -3166,7 +3166,7 @@ ring_buffer_peek(struct ring_buffer *buffer, int cpu, u64 *ts)
        local_irq_save(flags);
        if (dolock)
                spin_lock(&cpu_buffer->reader_lock);
-       event = rb_buffer_peek(buffer, cpu, ts);
+       event = rb_buffer_peek(cpu_buffer, ts);
        if (event && event->type_len == RINGBUF_TYPE_PADDING)
                rb_advance_reader(cpu_buffer);
        if (dolock)
@@ -3235,7 +3235,7 @@ ring_buffer_consume(struct ring_buffer *buffer, int cpu, u64 *ts)
        if (dolock)
                spin_lock(&cpu_buffer->reader_lock);
 
-       event = rb_buffer_peek(buffer, cpu, ts);
+       event = rb_buffer_peek(cpu_buffer, ts);
        if (event)
                rb_advance_reader(cpu_buffer);
 
@@ -3498,6 +3498,7 @@ int ring_buffer_empty_cpu(struct ring_buffer *buffer, int cpu)
 }
 EXPORT_SYMBOL_GPL(ring_buffer_empty_cpu);
 
+#ifdef CONFIG_RING_BUFFER_ALLOW_SWAP
 /**
  * ring_buffer_swap_cpu - swap a CPU buffer between two ring buffers
  * @buffer_a: One buffer to swap with
@@ -3573,6 +3574,7 @@ out:
        return ret;
 }
 EXPORT_SYMBOL_GPL(ring_buffer_swap_cpu);
+#endif /* CONFIG_RING_BUFFER_ALLOW_SWAP */
 
 /**
  * ring_buffer_alloc_read_page - allocate a page to read from buffer