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| author | Robert Richter <robert.richter@amd.com> | 2008-12-25 17:26:07 +0100 |
|---|---|---|
| committer | Robert Richter <robert.richter@amd.com> | 2009-01-07 22:41:47 +0100 |
| commit | d9928c25a6960cf128c2078a89fe6f8e0180ff60 (patch) | |
| tree | a6aa4141a531beb6f5d2025d8656d9404ae64ba8 /drivers/oprofile | |
| parent | ae735e9964b4584923f2997d98a8d80ae9c1a75c (diff) | |
| download | lwn-d9928c25a6960cf128c2078a89fe6f8e0180ff60.tar.gz lwn-d9928c25a6960cf128c2078a89fe6f8e0180ff60.zip | |
oprofile: add op_cpu_buffer_add_data()
This function can be used to attach data to a sample. It returns the
remaining free buffer size that has been reserved with
op_cpu_buffer_write_reserve().
Signed-off-by: Robert Richter <robert.richter@amd.com>
Diffstat (limited to 'drivers/oprofile')
| -rw-r--r-- | drivers/oprofile/cpu_buffer.c | 2 | ||||
| -rw-r--r-- | drivers/oprofile/cpu_buffer.h | 12 |
2 files changed, 13 insertions, 1 deletions
diff --git a/drivers/oprofile/cpu_buffer.c b/drivers/oprofile/cpu_buffer.c index e859d23cfc57..1b6590746be4 100644 --- a/drivers/oprofile/cpu_buffer.c +++ b/drivers/oprofile/cpu_buffer.c @@ -258,7 +258,7 @@ op_add_code(struct oprofile_cpu_buffer *cpu_buf, unsigned long backtrace, sample->event = flags; if (size) - sample->data[0] = (unsigned long)task; + op_cpu_buffer_add_data(&entry, (unsigned long)task); op_cpu_buffer_write_commit(&entry); diff --git a/drivers/oprofile/cpu_buffer.h b/drivers/oprofile/cpu_buffer.h index e634dcf2f26f..e178dd2799c4 100644 --- a/drivers/oprofile/cpu_buffer.h +++ b/drivers/oprofile/cpu_buffer.h @@ -78,6 +78,18 @@ int op_cpu_buffer_write_commit(struct op_entry *entry); struct op_sample *op_cpu_buffer_read_entry(struct op_entry *entry, int cpu); unsigned long op_cpu_buffer_entries(int cpu); +/* 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; +} + /* extra data flags */ #define KERNEL_CTX_SWITCH (1UL << 0) #define IS_KERNEL (1UL << 1) |