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Date: Tue, 25 Apr 2017 08:47:29 +1000 (AEST) From: Michael Ellerman <patch-notifications@...erman.id.au> To: "Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com> Cc: linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org, Masami Hiramatsu <mhiramat@...nel.org>, Ingo Molnar <mingo@...nel.org> Subject: Re: [v4,2/6] powerpc: ftrace: restore LR from pt_regs 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@...ux.vnet.ibm.com> Applied to powerpc next, thanks. https://git.kernel.org/powerpc/c/2f59be5b970b503ca8db1cb723b155 cheers
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