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ftrace: insert in the ftrace_preempt_disable()/enable() functions

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Impact: use new, consolidated APIs in ftrace plugins

This patch replaces the schedule safe preempt disable code with the
ftrace_preempt_disable() and ftrace_preempt_enable() safe functions.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Steven Rostedt 2008-11-03 23:15:56 -05:00 • committed by Ingo Molnar
parent 8f0a056fcb
commit 182e9f5f70
4 changed files with 15 additions and 41 deletions
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8
kernel/trace/trace_stack.c
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@ -107,8 +107,7 @@ stack_trace_call(unsigned long ip, unsigned long parent_ip)
if (unlikely(!ftrace_enabled || stack_trace_disabled))
return;
resched = need_resched();
preempt_disable_notrace();
resched = ftrace_preempt_disable();
cpu = raw_smp_processor_id();
/* no atomic needed, we only modify this variable by this cpu */
@ -120,10 +119,7 @@ stack_trace_call(unsigned long ip, unsigned long parent_ip)
out:
per_cpu(trace_active, cpu)--;
/* prevent recursion in schedule */
if (resched)
preempt_enable_no_resched_notrace();
else
preempt_enable_notrace();
ftrace_preempt_enable(resched);
}
static struct ftrace_ops trace_ops __read_mostly =