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tracing: Kill trace_cpu struct/members

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After the previous changes trace_array_cpu->trace_cpu and
trace_array->trace_cpu becomes write-only. Remove these members
and kill "struct trace_cpu" as well.

As a side effect this also removes memset(per_cpu_memory, 0).
It was not needed, alloc_percpu() returns zero-filled memory.

Link: http://lkml.kernel.org/r/20130723152613.GA23741@redhat.com

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Oleg Nesterov 2013-07-23 17:26:13 +02:00 • committed by Steven Rostedt
parent 6484c71cbc
commit 9c01fe4593
2 changed files with 0 additions and 29 deletions
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8
kernel/trace/trace.h
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@ -130,19 +130,12 @@ enum trace_flag_type {
struct trace_array;
struct trace_cpu {
struct trace_array *tr;
struct dentry *dir;
int cpu;
};
/*
* The CPU trace array - it consists of thousands of trace entries
* plus some other descriptor data: (for example which task started
* the trace, etc.)
*/
struct trace_array_cpu {
struct trace_cpu trace_cpu;
atomic_t disabled;
void *buffer_page; /* ring buffer spare */
@ -196,7 +189,6 @@ struct trace_array {
bool allocated_snapshot;
#endif
int buffer_disabled;
struct trace_cpu trace_cpu; /* place holder */
#ifdef CONFIG_FTRACE_SYSCALLS
int sys_refcount_enter;
int sys_refcount_exit;