ftrace: Add private data to ftrace_ops

Browse source

Passing data to the function callback was originally done by adding the
ftrace_ops in another structure, and using the container_of() to get
the field. But this adds a bit more complexity than it is worth, and
adding a simple .private field to ftrace_ops makes things a lot easier.

But be warned, the .private data should not be freed once it is used
unless the ftrace_ops itself has gone through the necessary freeing
routines. A simple synchronize_sched() is not enough as functions
can be traced that are called outside the view of RCU and all its
concoctions.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

...

This commit is contained in:

Steven Rostedt (Red Hat) 2013-11-07 09:36:25 -05:00 • committed by Steven Rostedt

parent f1b21c9a40

commit b7e00a6c53

1 changed files with 12 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

12

include/linux/ftrace.h

View file