tree 7a69042d5f841ee7f66f0d6661df09c9fdfbe402
parent 0fdf86754f70e813845af4abaa805165ce57a0bb
author Steven J. Magnani <steve@digidescorp.com> 1270232979 -0500
committer Michal Simek <monstr@monstr.eu> 1270618045 +0200

microblaze: Fix ftrace_update_ftrace_func panic

The Microblaze dynamic ftrace code assumes a call ordering that is not met
in all scenarios. Specifically, executing a command similar to:

  echo 105 > /sys/kernel/debug/tracing/set_ftrace_pid

before any other tracing-related commands results in a kernel panic:

  BUG: failure at arch/microblaze/kernel/ftrace.c:198/ftrace_update_ftrace_func()!

Recoding ftrace_update_ftrace_func() to use &ftrace_caller directly eliminates
the need to capture its address elsewhere (and thus rely on a particular call
sequence).

Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>