breeze/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-01-25 15:03:52 +08:00
Code Issues Packages Projects Releases Wiki Activity

ftrace: Use this_cpu_ptr() instead of per_cpu_ptr(smp_processor_id())

Browse Source 
Use this_cpu_ptr() instead of open coding the equivalent in various
ftrace functions.

Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Link: https://lore.kernel.org/87y14t6ofi.wl-me@linux.beauty
Signed-off-by: Li Chen <chenl311@chinatelecom.cn>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
This commit is contained in:
Li Chen
2024-08-19 14:01:53 +08:00
committed by Steven Rostedt (Google)
parent 8cf0b93919
commit e32540b1e4
1 changed files with 3 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
kernel/trace/trace_functions.c
View File

@@ -184,7 +184,6 @@ function_trace_call(unsigned long ip, unsigned long parent_ip,
struct trace_array_cpu *data;
unsigned int trace_ctx;
int bit;
int cpu;
if (unlikely(!tr->function_enabled))
return;
@@ -195,8 +194,7 @@ function_trace_call(unsigned long ip, unsigned long parent_ip,
trace_ctx = tracing_gen_ctx();
cpu = smp_processor_id();
data = per_cpu_ptr(tr->array_buffer.data, cpu);
data = this_cpu_ptr(tr->array_buffer.data);
if (!atomic_read(&data->disabled))
trace_function(tr, ip, parent_ip, trace_ctx);
@@ -300,7 +298,6 @@ function_no_repeats_trace_call(unsigned long ip, unsigned long parent_ip,
unsigned int trace_ctx;
unsigned long flags;
int bit;
int cpu;
if (unlikely(!tr->function_enabled))
return;
@@ -309,8 +306,7 @@ function_no_repeats_trace_call(unsigned long ip, unsigned long parent_ip,
if (bit < 0)
return;
cpu = smp_processor_id();
data = per_cpu_ptr(tr->array_buffer.data, cpu);
data = this_cpu_ptr(tr->array_buffer.data);
if (atomic_read(&data->disabled))
goto out;
@@ -321,7 +317,7 @@ function_no_repeats_trace_call(unsigned long ip, unsigned long parent_ip,
* TODO: think about a solution that is better than just hoping to be
* lucky.
*/
last_info = per_cpu_ptr(tr->last_func_repeats, cpu);
last_info = this_cpu_ptr(tr->last_func_repeats);
if (is_repeat_check(tr, last_info, ip, parent_ip))
goto out;