oprofile: Introduce new oprofile sample add function (oprofile_add_ext_hw_sample)
This patch introduces a new oprofile sample add function
(oprofile_add_ext_hw_sample) that can also take task_struct as an
argument, which is used by the hwsampler kernel module when copying
hardware samples to OProfile buffers.
Applied with following changes:
* removed #include <linux/module.h>
* whitespace changes
* removed conditional compilation (CONFIG_HAVE_HWSAMPLER)
* modified order of functions
* fix missing function definition in header file
Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Signed-off-by: Maran Pakkirisamy <maranp@linux.vnet.ibm.com>
Signed-off-by: Heinz Graalfs <graalfs@linux.vnet.ibm.com>
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Robert Richter <robert.richter@amd.com>
diff --git a/drivers/oprofile/cpu_buffer.c b/drivers/oprofile/cpu_buffer.c
index 59f5544..b8ef8dd 100644
--- a/drivers/oprofile/cpu_buffer.c
+++ b/drivers/oprofile/cpu_buffer.c
@@ -258,8 +258,10 @@
*/
static int
log_sample(struct oprofile_cpu_buffer *cpu_buf, unsigned long pc,
- unsigned long backtrace, int is_kernel, unsigned long event)
+ unsigned long backtrace, int is_kernel, unsigned long event,
+ struct task_struct *task)
{
+ struct task_struct *tsk = task ? task : current;
cpu_buf->sample_received++;
if (pc == ESCAPE_CODE) {
@@ -267,7 +269,7 @@
return 0;
}
- if (op_add_code(cpu_buf, backtrace, is_kernel, current))
+ if (op_add_code(cpu_buf, backtrace, is_kernel, tsk))
goto fail;
if (op_add_sample(cpu_buf, pc, event))
@@ -292,7 +294,8 @@
static inline void
__oprofile_add_ext_sample(unsigned long pc, struct pt_regs * const regs,
- unsigned long event, int is_kernel)
+ unsigned long event, int is_kernel,
+ struct task_struct *task)
{
struct oprofile_cpu_buffer *cpu_buf = &__get_cpu_var(op_cpu_buffer);
unsigned long backtrace = oprofile_backtrace_depth;
@@ -301,7 +304,7 @@
* if log_sample() fail we can't backtrace since we lost the
* source of this event
*/
- if (!log_sample(cpu_buf, pc, backtrace, is_kernel, event))
+ if (!log_sample(cpu_buf, pc, backtrace, is_kernel, event, task))
/* failed */
return;
@@ -313,10 +316,17 @@
oprofile_end_trace(cpu_buf);
}
+void oprofile_add_ext_hw_sample(unsigned long pc, struct pt_regs * const regs,
+ unsigned long event, int is_kernel,
+ struct task_struct *task)
+{
+ __oprofile_add_ext_sample(pc, regs, event, is_kernel, task);
+}
+
void oprofile_add_ext_sample(unsigned long pc, struct pt_regs * const regs,
unsigned long event, int is_kernel)
{
- __oprofile_add_ext_sample(pc, regs, event, is_kernel);
+ __oprofile_add_ext_sample(pc, regs, event, is_kernel, NULL);
}
void oprofile_add_sample(struct pt_regs * const regs, unsigned long event)
@@ -332,7 +342,7 @@
pc = ESCAPE_CODE; /* as this causes an early return. */
}
- __oprofile_add_ext_sample(pc, regs, event, is_kernel);
+ __oprofile_add_ext_sample(pc, regs, event, is_kernel, NULL);
}
/*
@@ -403,7 +413,7 @@
void oprofile_add_pc(unsigned long pc, int is_kernel, unsigned long event)
{
struct oprofile_cpu_buffer *cpu_buf = &__get_cpu_var(op_cpu_buffer);
- log_sample(cpu_buf, pc, 0, is_kernel, event);
+ log_sample(cpu_buf, pc, 0, is_kernel, event, NULL);
}
void oprofile_add_trace(unsigned long pc)