USB: EHCI: defer reclamation of siTDs

[safe/jmp/linux-2.6] / drivers / oprofile / cpu_buffer.h

diff --git a/drivers/oprofile/cpu_buffer.h b/drivers/oprofile/cpu_buffer.h
index 65b763a..68ea16a 100644 (file)
--- a/drivers/oprofile/cpu_buffer.h
+++ b/drivers/oprofile/cpu_buffer.h
@@ -1,10 +1,11 @@
 /**
  * @file cpu_buffer.h
  *
- * @remark Copyright 2002 OProfile authors
+ * @remark Copyright 2002-2009 OProfile authors
  * @remark Read the file COPYING
  *
  * @author John Levon <levon@movementarian.org>
+ * @author Robert Richter <robert.richter@amd.com>
  */
 
 #ifndef OPROFILE_CPU_BUFFER_H
@@ -31,13 +32,10 @@ void end_cpu_work(void);
 struct op_sample {
        unsigned long eip;
        unsigned long event;
+       unsigned long data[0];
 };
 
-struct op_entry {
-       struct ring_buffer_event *event;
-       struct op_sample *sample;
-       unsigned long irq_flags;
-};
+struct op_entry;
 
 struct oprofile_cpu_buffer {
        unsigned long buffer_size;
@@ -52,7 +50,7 @@ struct oprofile_cpu_buffer {
        struct delayed_work work;
 };
 
-DECLARE_PER_CPU(struct oprofile_cpu_buffer, cpu_buffer);
+DECLARE_PER_CPU(struct oprofile_cpu_buffer, op_cpu_buffer);
 
 /*
  * Resets the cpu buffer to a sane state.
@@ -62,21 +60,61 @@ DECLARE_PER_CPU(struct oprofile_cpu_buffer, cpu_buffer);
  */
 static inline void op_cpu_buffer_reset(int cpu)
 {
-       struct oprofile_cpu_buffer *cpu_buf = &per_cpu(cpu_buffer, cpu);
+       struct oprofile_cpu_buffer *cpu_buf = &per_cpu(op_cpu_buffer, cpu);
 
        cpu_buf->last_is_kernel = -1;
        cpu_buf->last_task = NULL;
 }
 
-int op_cpu_buffer_write_entry(struct op_entry *entry);
+/*
+ * op_cpu_buffer_add_data() and op_cpu_buffer_write_commit() may be
+ * called only if op_cpu_buffer_write_reserve() did not return NULL or
+ * entry->event != NULL, otherwise entry->size or entry->event will be
+ * used uninitialized.
+ */
+
+struct op_sample
+*op_cpu_buffer_write_reserve(struct op_entry *entry, unsigned long size);
 int op_cpu_buffer_write_commit(struct op_entry *entry);
-struct op_sample *op_cpu_buffer_read_entry(int cpu);
+struct op_sample *op_cpu_buffer_read_entry(struct op_entry *entry, int cpu);
 unsigned long op_cpu_buffer_entries(int cpu);
 
-/* transient events for the CPU buffer -> event buffer */
-#define CPU_IS_KERNEL 1
-#define CPU_TRACE_BEGIN 2
-#define IBS_FETCH_BEGIN 3
-#define IBS_OP_BEGIN    4
+/* returns the remaining free size of data in the entry */
+static inline
+int op_cpu_buffer_add_data(struct op_entry *entry, unsigned long val)
+{
+       if (!entry->size)
+               return 0;
+       *entry->data = val;
+       entry->size--;
+       entry->data++;
+       return entry->size;
+}
+
+/* returns the size of data in the entry */
+static inline
+int op_cpu_buffer_get_size(struct op_entry *entry)
+{
+       return entry->size;
+}
+
+/* returns 0 if empty or the size of data including the current value */
+static inline
+int op_cpu_buffer_get_data(struct op_entry *entry, unsigned long *val)
+{
+       int size = entry->size;
+       if (!size)
+               return 0;
+       *val = *entry->data;
+       entry->size--;
+       entry->data++;
+       return size;
+}
+
+/* extra data flags */
+#define KERNEL_CTX_SWITCH      (1UL << 0)
+#define IS_KERNEL              (1UL << 1)
+#define TRACE_BEGIN            (1UL << 2)
+#define USER_CTX_SWITCH                (1UL << 3)
 
 #endif /* OPROFILE_CPU_BUFFER_H */