powerpc: port of dynamic ftrace

Paul,

Here are the patches that include the changes suggested by both you and Milton. This series includes the back port of three commits from tip that are needed for the PowerPC port.

I also made a git branch called "ppc/ftrace-disable" that does not include two of the three commits. It adds a patch to keep dynamic ftrace from being enabled by PowerPC architectures.

As I stated above, both branches include one commit from tip:

ftrace: align __mcount_loc sections

This is because one of the PowerPC patches will not apply without it. That commit was a clean cherry pick into mainline, so I'm not worried about it. Still, the only commits that should go to mainline from the PowerPC git repo are the ones that start with "powerpc".

In the ppc/ftrace-hack branch, I folded the other two commits from tip, that are needed for the port, into a single commit. This commit is called:

NOT FOR MAINLINE ftrace: pass module struct to arch dynamic ftrace functions

This is only to let you test the rest of the patches. I've booted this branch and ran it on both my PPC64 and my PP32 boxes.

Again:

The working branch is: ppc/ftrace-hack

The disabling dynamic ftrace branch is: ppc/ftrace-disable

Only the commits starting with "powerpc" should be pushed to mainline by you. Those patches are the same in both of the above branches.

Also, I have not tested that "NOT FOR MAINLINE" patch on x86. It may break that arch. Which is another reason not to push it.

The following patches are in:

git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace.git

branch: ppc/ftrace-hack

Matt Fleming (1):
ftrace: align __mcount_loc sections

Steven Rostedt (8):
NOT FOR MAINLINE ftrace: pass module struct to arch dynamic ftrace functions
powerpc: ftrace, do not latency trace idle
powerpc: ftrace, convert to new dynamic ftrace arch API powerpc/ppc64: ftrace, mcount record powerpc port
powerpc: ftrace, use probe_kernel API to modify code powerpc/ppc64: ftrace, handle module trampolines for dyn ftrace powerpc/ppc32: ftrace, enabled dynamic ftrace
powerpc/ppc32: ftrace, dynamic ftrace to handle modules

----

 arch/powerpc/Kconfig              |    2 +
 arch/powerpc/include/asm/ftrace.h |   14 +-
 arch/powerpc/include/asm/module.h |   16 ++-
 arch/powerpc/kernel/ftrace.c      |  473 +++++++++++++++++++++++++++++++++---
 arch/powerpc/kernel/idle.c        |    5 +
 arch/powerpc/kernel/module_32.c   |   10 +
 arch/powerpc/kernel/module_64.c   |   13 +
 arch/x86/include/asm/ftrace.h     |    9 +-
 arch/x86/kernel/ftrace.c          |  168 +++++++++++++-
 include/linux/ftrace.h            |   51 ++++-
 kernel/module.c                   |    2 +-
 kernel/trace/ftrace.c             |  137 ++++++------
 scripts/recordmcount.pl           |   20 ++-
 13 files changed, 790 insertions(+), 130 deletions(-)