[v4,2/6] powerpc: ftrace: restore LR from pt_regs

[Michael Ellerman]

On Wed, 2017-04-19 at 12:52:24 UTC, "Naveen N. Rao" wrote:
> Pass the real LR to the ftrace handler. This is needed for
> KPROBES_ON_FTRACE for the pre handlers.
> 
> Also, with KPROBES_ON_FTRACE, the link register may be updated by the
> pre handlers or by a registed kretprobe. Honor updated LR by restoring
> it from pt_regs, rather than from the stack save area.
> 
> Live patch and function graph continue to work fine with this change.
> 
> Signed-off-by: Naveen N. Rao <naveen.n.rao at linux.vnet.ibm.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/2f59be5b970b503ca8db1cb723b155

cheers