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Merge tag 'trace-v4.19-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

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Steven writes:
  "tracing: Two fixes for 4.19

   This fixes two bugs:
    - Fix size mismatch of tracepoint array
    - Have preemptirq test module use same clock source of the selftest"

* tag 'trace-v4.19-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing: Use trace_clock_local() for looping in preemptirq_delay_test.c
  tracepoint: Fix tracepoint array element size mismatch
This commit is contained in:
Greg Kroah-Hartman
2018-10-18 07:29:05 +02:00
parent c343db455e 12ad0cb212
commit 9bd871df56
5 changed files with 44 additions and 35 deletions
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10
kernel/trace/preemptirq_delay_test.c
View File

@@ -5,12 +5,12 @@
* Copyright (C) 2018 Joel Fernandes (Google) <joel@joelfernandes.org>
*/
#include <linux/trace_clock.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/kernel.h>
#include <linux/kthread.h>
#include <linux/ktime.h>
#include <linux/module.h>
#include <linux/printk.h>
#include <linux/string.h>
@@ -25,13 +25,13 @@ MODULE_PARM_DESC(test_mode, "Mode of the test such as preempt or irq (default ir
static void busy_wait(ulong time)
{
ktime_t start, end;
start = ktime_get();
u64 start, end;
start = trace_clock_local();
do {
end = ktime_get();
end = trace_clock_local();
if (kthread_should_stop())
break;
} while (ktime_to_ns(ktime_sub(end, start)) < (time * 1000));
} while ((end - start) < (time * 1000));
}
static int preemptirq_delay_run(void *data)

24
kernel/tracepoint.c
View File

@@ -28,8 +28,8 @@
#include <linux/sched/task.h>
#include <linux/static_key.h>
extern struct tracepoint * const __start___tracepoints_ptrs[];
extern struct tracepoint * const __stop___tracepoints_ptrs[];
extern tracepoint_ptr_t __start___tracepoints_ptrs[];
extern tracepoint_ptr_t __stop___tracepoints_ptrs[];
DEFINE_SRCU(tracepoint_srcu);
EXPORT_SYMBOL_GPL(tracepoint_srcu);
@@ -371,25 +371,17 @@ int tracepoint_probe_unregister(struct tracepoint *tp, void *probe, void *data)
}
EXPORT_SYMBOL_GPL(tracepoint_probe_unregister);
static void for_each_tracepoint_range(struct tracepoint * const *begin,
struct tracepoint * const *end,
static void for_each_tracepoint_range(
tracepoint_ptr_t *begin, tracepoint_ptr_t *end,
void (*fct)(struct tracepoint *tp, void *priv),
void *priv)
{
tracepoint_ptr_t *iter;
if (!begin)
return;
if (IS_ENABLED(CONFIG_HAVE_ARCH_PREL32_RELOCATIONS)) {
const int *iter;
for (iter = (const int *)begin; iter < (const int *)end; iter++)
fct(offset_to_ptr(iter), priv);
} else {
struct tracepoint * const *iter;
for (iter = begin; iter < end; iter++)
fct(*iter, priv);
}
for (iter = begin; iter < end; iter++)
fct(tracepoint_ptr_deref(iter), priv);
}
#ifdef CONFIG_MODULES