percpu: make percpu symbols in oprofile unique
This patch updates percpu related symbols in oprofile such that percpu
symbols are unique and don't clash with local symbols. This serves
two purposes of decreasing the possibility of global percpu symbol
collision and allowing dropping per_cpu__ prefix from percpu symbols.
* drivers/oprofile/cpu_buffer.c: s/cpu_buffer/op_cpu_buffer/
Partly based on Rusty Russell's "alloc_percpu: rename percpu vars
which cause name clashes" patch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Robert Richter <robert.richter@amd.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
diff --git a/drivers/oprofile/cpu_buffer.c b/drivers/oprofile/cpu_buffer.c
index a7aae24..166b67e 100644
--- a/drivers/oprofile/cpu_buffer.c
+++ b/drivers/oprofile/cpu_buffer.c
@@ -47,7 +47,7 @@
*/
static struct ring_buffer *op_ring_buffer_read;
static struct ring_buffer *op_ring_buffer_write;
-DEFINE_PER_CPU(struct oprofile_cpu_buffer, cpu_buffer);
+DEFINE_PER_CPU(struct oprofile_cpu_buffer, op_cpu_buffer);
static void wq_sync_buffer(struct work_struct *work);
@@ -61,8 +61,7 @@
void oprofile_cpu_buffer_inc_smpl_lost(void)
{
- struct oprofile_cpu_buffer *cpu_buf
- = &__get_cpu_var(cpu_buffer);
+ struct oprofile_cpu_buffer *cpu_buf = &__get_cpu_var(op_cpu_buffer);
cpu_buf->sample_lost_overflow++;
}
@@ -95,7 +94,7 @@
goto fail;
for_each_possible_cpu(i) {
- struct oprofile_cpu_buffer *b = &per_cpu(cpu_buffer, i);
+ struct oprofile_cpu_buffer *b = &per_cpu(op_cpu_buffer, i);
b->last_task = NULL;
b->last_is_kernel = -1;
@@ -122,7 +121,7 @@
work_enabled = 1;
for_each_online_cpu(i) {
- struct oprofile_cpu_buffer *b = &per_cpu(cpu_buffer, i);
+ struct oprofile_cpu_buffer *b = &per_cpu(op_cpu_buffer, i);
/*
* Spread the work by 1 jiffy per cpu so they dont all
@@ -139,7 +138,7 @@
work_enabled = 0;
for_each_online_cpu(i) {
- struct oprofile_cpu_buffer *b = &per_cpu(cpu_buffer, i);
+ struct oprofile_cpu_buffer *b = &per_cpu(op_cpu_buffer, i);
cancel_delayed_work(&b->work);
}
@@ -330,7 +329,7 @@
__oprofile_add_ext_sample(unsigned long pc, struct pt_regs * const regs,
unsigned long event, int is_kernel)
{
- struct oprofile_cpu_buffer *cpu_buf = &__get_cpu_var(cpu_buffer);
+ struct oprofile_cpu_buffer *cpu_buf = &__get_cpu_var(op_cpu_buffer);
unsigned long backtrace = oprofile_backtrace_depth;
/*
@@ -375,7 +374,7 @@
{
struct op_sample *sample;
int is_kernel = !user_mode(regs);
- struct oprofile_cpu_buffer *cpu_buf = &__get_cpu_var(cpu_buffer);
+ struct oprofile_cpu_buffer *cpu_buf = &__get_cpu_var(op_cpu_buffer);
cpu_buf->sample_received++;
@@ -430,13 +429,13 @@
void oprofile_add_pc(unsigned long pc, int is_kernel, unsigned long event)
{
- struct oprofile_cpu_buffer *cpu_buf = &__get_cpu_var(cpu_buffer);
+ struct oprofile_cpu_buffer *cpu_buf = &__get_cpu_var(op_cpu_buffer);
log_sample(cpu_buf, pc, 0, is_kernel, event);
}
void oprofile_add_trace(unsigned long pc)
{
- struct oprofile_cpu_buffer *cpu_buf = &__get_cpu_var(cpu_buffer);
+ struct oprofile_cpu_buffer *cpu_buf = &__get_cpu_var(op_cpu_buffer);
if (!cpu_buf->tracing)
return;
diff --git a/drivers/oprofile/cpu_buffer.h b/drivers/oprofile/cpu_buffer.h
index 272995d..68ea16a 100644
--- a/drivers/oprofile/cpu_buffer.h
+++ b/drivers/oprofile/cpu_buffer.h
@@ -50,7 +50,7 @@
struct delayed_work work;
};
-DECLARE_PER_CPU(struct oprofile_cpu_buffer, cpu_buffer);
+DECLARE_PER_CPU(struct oprofile_cpu_buffer, op_cpu_buffer);
/*
* Resets the cpu buffer to a sane state.
@@ -60,7 +60,7 @@
*/
static inline void op_cpu_buffer_reset(int cpu)
{
- struct oprofile_cpu_buffer *cpu_buf = &per_cpu(cpu_buffer, cpu);
+ struct oprofile_cpu_buffer *cpu_buf = &per_cpu(op_cpu_buffer, cpu);
cpu_buf->last_is_kernel = -1;
cpu_buf->last_task = NULL;
diff --git a/drivers/oprofile/oprofile_stats.c b/drivers/oprofile/oprofile_stats.c
index 61689e8..917d28e 100644
--- a/drivers/oprofile/oprofile_stats.c
+++ b/drivers/oprofile/oprofile_stats.c
@@ -23,7 +23,7 @@
int i;
for_each_possible_cpu(i) {
- cpu_buf = &per_cpu(cpu_buffer, i);
+ cpu_buf = &per_cpu(op_cpu_buffer, i);
cpu_buf->sample_received = 0;
cpu_buf->sample_lost_overflow = 0;
cpu_buf->backtrace_aborted = 0;
@@ -51,7 +51,7 @@
return;
for_each_possible_cpu(i) {
- cpu_buf = &per_cpu(cpu_buffer, i);
+ cpu_buf = &per_cpu(op_cpu_buffer, i);
snprintf(buf, 10, "cpu%d", i);
cpudir = oprofilefs_mkdir(sb, dir, buf);