From d9928c25a6960cf128c2078a89fe6f8e0180ff60 Mon Sep 17 00:00:00 2001
From: Robert Richter <robert.richter@amd.com>
Date: Thu, 25 Dec 2008 17:26:07 +0100
Subject: [PATCH] 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>
---
drivers/oprofile/cpu_buffer.c | 2 +-
drivers/oprofile/cpu_buffer.h | 12 ++++++++++++
2 files changed, 13 insertions(+), 1 deletion(-)
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)
--
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