lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

locking, tracing: Annotate tracing locks as raw

Browse Source 
The tracing locks can be taken in atomic context and therefore
cannot be preempted on -rt - annotate it.

In mainline this change documents the low level nature of
the lock - otherwise there's no functional difference. Lockdep
and Sparse checking will work as usual.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Thomas Gleixner
2009-07-25 17:13:33 +02:00
committed by Ingo Molnar
parent 740969f91e
commit 5389f6fad2
3 changed files with 34 additions and 34 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
kernel/trace/trace_irqsoff.c
View File

@ -23,7 +23,7 @@ static int tracer_enabled __read_mostly;
static DEFINE_PER_CPU(int, tracing_cpu);
static DEFINE_SPINLOCK(max_trace_lock);
static DEFINE_RAW_SPINLOCK(max_trace_lock);
enum {
TRACER_IRQS_OFF = (1 << 1),
@ -321,7 +321,7 @@ check_critical_timing(struct trace_array *tr,
if (!report_latency(delta))
goto out;
spin_lock_irqsave(&max_trace_lock, flags);
raw_spin_lock_irqsave(&max_trace_lock, flags);
/* check if we are still the max latency */
if (!report_latency(delta))
@ -344,7 +344,7 @@ check_critical_timing(struct trace_array *tr,
max_sequence++;
out_unlock:
spin_unlock_irqrestore(&max_trace_lock, flags);
raw_spin_unlock_irqrestore(&max_trace_lock, flags);
out:
data->critical_sequence = max_sequence;