mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-16 14:56:43 +07:00
a773d41927
By passing an export descriptor to the write function, users don't need to keep a global static pointer and can rely on container_of() to fetch their own structure. Link: http://lkml.kernel.org/r/20170602102025.5140-1-felipe.balbi@linux.intel.com Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Reviewed-by: Chunyan Zhang <zhang.chunyan@linaro.org> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
30 lines
964 B
C
30 lines
964 B
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _LINUX_TRACE_H
|
|
#define _LINUX_TRACE_H
|
|
|
|
#ifdef CONFIG_TRACING
|
|
/*
|
|
* The trace export - an export of Ftrace output. The trace_export
|
|
* can process traces and export them to a registered destination as
|
|
* an addition to the current only output of Ftrace - i.e. ring buffer.
|
|
*
|
|
* If you want traces to be sent to some other place rather than ring
|
|
* buffer only, just need to register a new trace_export and implement
|
|
* its own .write() function for writing traces to the storage.
|
|
*
|
|
* next - pointer to the next trace_export
|
|
* write - copy traces which have been delt with ->commit() to
|
|
* the destination
|
|
*/
|
|
struct trace_export {
|
|
struct trace_export __rcu *next;
|
|
void (*write)(struct trace_export *, const void *, unsigned int);
|
|
};
|
|
|
|
int register_ftrace_export(struct trace_export *export);
|
|
int unregister_ftrace_export(struct trace_export *export);
|
|
|
|
#endif /* CONFIG_TRACING */
|
|
|
|
#endif /* _LINUX_TRACE_H */
|