commit 26c01624a2a40f8a4ddf6449b65c9b1c418d0e72
author Steven Rostedt <srostedt@redhat.com> Tue Jun 02 14:01:19 2009 -0400
committer Steven Rostedt <rostedt@goodmis.org> Tue Jun 02 14:42:17 2009 -0400
tree eeff81aa0fa56ba1f2c180d4ec6e64cb31af898e
parent 82310a3272d5a2a7652f5649ad8a55f58c8f74d9

function-graph: add memory barriers for accessing task's ret_stack

The code that handles the tasks ret_stack allocation for every task
assumes that only an interrupt can cause issues (even though interrupts
are disabled).

In reality, the code is allocating the ret_stack for tasks that may be
running on other CPUs and there are not efficient memory barriers to
handle this case.

[ Impact: prevent crash due to using of uninitialized ret_stack variables ]

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