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Date: Fri, 24 Apr 2015 11:27:30 +0200 (CEST) From: Jiri Kosina <jkosina@...e.cz> To: AKASHI Takahiro <takahiro.akashi@...aro.org> cc: rostedt@...dmis.org, mingo@...nel.org, jpoimboe@...hat.com, sjenning@...hat.com, vojtech@...e.cz, catalin.marinas@....com, will.deacon@....com, broonie@...nel.org, masami.hiramatsu.pt@...achi.com, live-patching@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linaro-kernel@...ts.linaro.org, linux-kernel@...r.kernel.org Subject: Re: [RFC 0/4] arm64: add livepatch support On Fri, 24 Apr 2015, AKASHI Takahiro wrote: > This patchset enables livepatch support on arm64. > > Livepatch was merged in v4.0, and allows replacying a function dynamically > based on ftrace framework, but it also requires -mfentry option of gcc. > Currently arm64 gcc doesn't support it, but by adding a helper function to > ftrace, we will be able to support livepatch on arch's which don't support > this option. > > I submit this patchset as RFC since I'm not quite sure that I'm doing > in the right way, or we should definitely support -fentry instead. I don't have arm64 cross-compiler handy, could you please copy/paste how does function prologue, generated by gcc -pg on arm64 look like? Thanks, -- Jiri Kosina SUSE Labs -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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