From: Robert Richter <robert.richter@amd.com>
Date: Thu, 25 Dec 2008 16:26:07 +0000 (+0100)
Subject: oprofile: add op_cpu_buffer_add_data()
X-Git-Tag: v2.6.29-rc1~32^2~1^2~5
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=d9928c25a6960cf128c2078a89fe6f8e0180ff60;p=linux-2.6-omap-h63xx.git

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>
---

diff --git a/drivers/oprofile/cpu_buffer.c b/drivers/oprofile/cpu_buffer.c
index e859d23cfc5..1b6590746be 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 e634dcf2f26..e178dd2799c 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)