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| author | Robert Richter <robert.richter@amd.com> | 2008-11-27 18:36:08 +0100 |
|---|---|---|
| committer | Robert Richter <robert.richter@amd.com> | 2008-12-10 14:20:14 +0100 |
| commit | 229234ae4a5ed9376b2e0524da04b0e5edadbf76 (patch) | |
| tree | 9f0434cbac64aa2d040b0b806d239b2335c163e1 /drivers/oprofile/cpu_buffer.c | |
| parent | 7d468abee0f1a7e918b5e2f23120436a54ba9f33 (diff) | |
| download | linux-229234ae4a5ed9376b2e0524da04b0e5edadbf76.tar.gz linux-229234ae4a5ed9376b2e0524da04b0e5edadbf76.tar.bz2 linux-229234ae4a5ed9376b2e0524da04b0e5edadbf76.zip | |
oprofile: adding cpu_buffer_write_commit()
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.c')
| -rw-r--r-- | drivers/oprofile/cpu_buffer.c | 18 |
1 files changed, 1 insertions, 17 deletions
diff --git a/drivers/oprofile/cpu_buffer.c b/drivers/oprofile/cpu_buffer.c index 7e5e650e409f..d6f5de686363 100644 --- a/drivers/oprofile/cpu_buffer.c +++ b/drivers/oprofile/cpu_buffer.c @@ -148,22 +148,6 @@ static unsigned long nr_available_slots(struct oprofile_cpu_buffer const *b) return tail + (b->buffer_size - head) - 1; } -static void increment_head(struct oprofile_cpu_buffer *b) -{ - unsigned long new_head = b->head_pos + 1; - - /* - * Ensure anything written to the slot before we increment is - * visible - */ - wmb(); - - if (new_head < b->buffer_size) - b->head_pos = new_head; - else - b->head_pos = 0; -} - static inline void add_sample(struct oprofile_cpu_buffer *cpu_buf, unsigned long pc, unsigned long event) @@ -171,7 +155,7 @@ add_sample(struct oprofile_cpu_buffer *cpu_buf, struct op_sample *entry = cpu_buffer_write_entry(cpu_buf); entry->eip = pc; entry->event = event; - increment_head(cpu_buf); + cpu_buffer_write_commit(cpu_buf); } static inline void |