powerpc/ftrace: Move stack setup and teardown code into ftrace_graph_caller()
authorNaveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Wed, 19 Apr 2017 12:52:23 +0000 (18:22 +0530)
committerMichael Ellerman <mpe@ellerman.id.au>
Sun, 23 Apr 2017 10:32:24 +0000 (20:32 +1000)
commit700e64377c2c8e2406e9c4c1632e2eabdb3a95a1
tree81366b9ea46323f532a7d74565899b013fa7d58d
parentd08f8a28bcc8c2004a7186839148fc9aadd5cc6f
powerpc/ftrace: Move stack setup and teardown code into ftrace_graph_caller()

Move the stack setup and teardown code into ftrace_graph_caller(). This way, we
don't incur the cost of setting it up unless function graph is enabled for this
function.

Also, remove the extraneous LR restore code after the function graph stub. LR
has previously been restored and neither livepatch_handler() nor
ftrace_graph_caller() return back here.

Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
[mpe: Drop bad change to non-mprofile-kernel version of ftrace_graph_caller]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
arch/powerpc/kernel/entry_64.S