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| author | Robert Richter <robert.richter@amd.com> | 2008-11-27 10:57:09 +0100 |
|---|---|---|
| committer | Robert Richter <robert.richter@amd.com> | 2008-12-10 14:20:13 +0100 |
| commit | 7d468abee0f1a7e918b5e2f23120436a54ba9f33 (patch) | |
| tree | 397e40ca95ef2dcf70ed308cd1032c0f63f0508c /drivers/oprofile/cpu_buffer.h | |
| parent | ftrace: remove unused function arg in trace_iterator_increment() (diff) | |
| download | linux-7d468abee0f1a7e918b5e2f23120436a54ba9f33.tar.xz linux-7d468abee0f1a7e918b5e2f23120436a54ba9f33.zip | |
oprofile: adding cpu buffer r/w access functions
This is in preparation for changes in the cpu buffer implementation.
Signed-off-by: Robert Richter <robert.richter@amd.com>
Diffstat (limited to 'drivers/oprofile/cpu_buffer.h')
| -rw-r--r-- | drivers/oprofile/cpu_buffer.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/oprofile/cpu_buffer.h b/drivers/oprofile/cpu_buffer.h index d3cc26264db5..08706991fdd2 100644 --- a/drivers/oprofile/cpu_buffer.h +++ b/drivers/oprofile/cpu_buffer.h @@ -52,6 +52,18 @@ DECLARE_PER_CPU(struct oprofile_cpu_buffer, cpu_buffer); void cpu_buffer_reset(struct oprofile_cpu_buffer *cpu_buf); +static inline +struct op_sample *cpu_buffer_write_entry(struct oprofile_cpu_buffer *cpu_buf) +{ + return &cpu_buf->buffer[cpu_buf->head_pos]; +} + +static inline +struct op_sample *cpu_buffer_read_entry(struct oprofile_cpu_buffer *cpu_buf) +{ + return &cpu_buf->buffer[cpu_buf->tail_pos]; +} + /* transient events for the CPU buffer -> event buffer */ #define CPU_IS_KERNEL 1 #define CPU_TRACE_BEGIN 2 |