forked from mirrors/linux
09705dcb63
In some cases the printf() mechanism is too heavy and can't be used. For example, when debugging a race condition involving devres API. When CONFIG_DEBUG_DEVRES is enabled I can't reproduce an issue, and otherwise it's quite visible with a useful information being collected. Enable trace events for devres part of the driver core. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/20210517122946.53161-4-andriy.shevchenko@linux.intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Device core Trace Support
|
|
* Copyright (C) 2021, Intel Corporation
|
|
*
|
|
* Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
|
|
*/
|
|
|
|
#undef TRACE_SYSTEM
|
|
#define TRACE_SYSTEM dev
|
|
|
|
#if !defined(__DEV_TRACE_H) || defined(TRACE_HEADER_MULTI_READ)
|
|
#define __DEV_TRACE_H
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/tracepoint.h>
|
|
#include <linux/types.h>
|
|
|
|
DECLARE_EVENT_CLASS(devres,
|
|
TP_PROTO(struct device *dev, const char *op, void *node, const char *name, size_t size),
|
|
TP_ARGS(dev, op, node, name, size),
|
|
TP_STRUCT__entry(
|
|
__string(devname, dev_name(dev))
|
|
__field(struct device *, dev)
|
|
__field(const char *, op)
|
|
__field(void *, node)
|
|
__field(const char *, name)
|
|
__field(size_t, size)
|
|
),
|
|
TP_fast_assign(
|
|
__assign_str(devname, dev_name(dev));
|
|
__entry->op = op;
|
|
__entry->node = node;
|
|
__entry->name = name;
|
|
__entry->size = size;
|
|
),
|
|
TP_printk("%s %3s %p %s (%zu bytes)", __get_str(devname),
|
|
__entry->op, __entry->node, __entry->name, __entry->size)
|
|
);
|
|
|
|
DEFINE_EVENT(devres, devres_log,
|
|
TP_PROTO(struct device *dev, const char *op, void *node, const char *name, size_t size),
|
|
TP_ARGS(dev, op, node, name, size)
|
|
);
|
|
|
|
#endif /* __DEV_TRACE_H */
|
|
|
|
/* this part has to be here */
|
|
|
|
#undef TRACE_INCLUDE_PATH
|
|
#define TRACE_INCLUDE_PATH .
|
|
|
|
#undef TRACE_INCLUDE_FILE
|
|
#define TRACE_INCLUDE_FILE trace
|
|
|
|
#include <trace/define_trace.h>
|