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SubjectRe: [2/5] livepatch: Allow architectures to specify an alternate ftrace location
On Wed, 2016-13-04 at 12:53:20 UTC, Michael Ellerman wrote:
> When livepatch tries to patch a function it takes the function address
> and asks ftrace to install the livepatch handler at that location.
> ftrace will look for an mcount call site at that exact address.
> On powerpc the mcount location is not the first instruction of the
> function, and in fact it's not at a constant offset from the start of
> the function. To accommodate this add a hook which arch code can
> override to customise the behaviour.
> Signed-off-by: Torsten Duwe <>
> Signed-off-by: Balbir Singh <>
> Signed-off-by: Petr Mladek <>
> Signed-off-by: Michael Ellerman <>

Applied to powerpc next.


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