[2/2] powerpc/modules: Never restore r2 for a mprofile-kernel style mcount() call

Michael Ellerman patch-notifications at ellerman.id.au
Fri Jul 22 15:50:43 AEST 2016

On Tue, 2016-19-07 at 04:48:31 UTC, Michael Ellerman wrote:
> In the module loader we process relocations, and for long jumps we
> generate trampolines (aka stubs). At the call site for one of these
> trampolines we usually need to generate a load instruction to restore
> the TOC pointer into r2.
> The fix is relatively simple, in restore_r2() we check for an
> mprofile-kernel style mcount() call first, before looking for the
> presence of a nop.
> Fixes: 153086644fd1 ("powerpc/ftrace: Add support for -mprofile-kernel ftrace ABI")
> Signed-off-by: Michael Ellerman <mpe at ellerman.id.au>

Applied to powerpc next.



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