tracefs: Add directory /sys/kernel/tracing (cc31004a) · Commits · 戴 / test

When tracefs is configured, have the directory /sys/kernel/tracing appear just like /sys/kernel/debug appears when debugfs is configured. This will give a consistent place for system admins to mount tracefs. Acked-by:

Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by:

Steven Rostedt <rostedt@goodmis.org>

fs/tracefs/inode.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -16,6 +16,7 @@
		#include <linux/module.h>
		#include <linux/fs.h>
		#include <linux/mount.h>
		#include <linux/kobject.h>
		#include <linux/namei.h>
		#include <linux/tracefs.h>
		#include <linux/fsnotify.h>
		@@ -509,10 +510,16 @@ bool tracefs_initialized(void)
		return tracefs_registered;
		}

		static struct kobject *trace_kobj;

		static int __init tracefs_init(void)
		{
		int retval;

		trace_kobj = kobject_create_and_add("tracing", kernel_kobj);
		if (!trace_kobj)
		return -EINVAL;

		retval = register_filesystem(&trace_fs_type);
		if (!retval)
		tracefs_registered = true;

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