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oprofile: add op_cpu_buffer_add_data()

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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>
This commit is contained in:
Robert Richter 2008-12-25 17:26:07 +01:00
parent ae735e9964
commit d9928c25a6
2 changed files with 13 additions and 1 deletions
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2
drivers/oprofile/cpu_buffer.c
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@ -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);

12
drivers/oprofile/cpu_buffer.h
View file

@ -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)