From mboxrd@z Thu Jan 1 00:00:00 1970 From: peterz@infradead.org (Peter Zijlstra) Date: Wed, 1 May 2019 21:41:32 +0200 Subject: [RFC][PATCH] ftrace/x86: Emulate call function while updating in breakpoint handler In-Reply-To: References: <20190430130359.330e895b@gandalf.local.home> <20190430132024.0f03f5b8@gandalf.local.home> <20190430134913.4e29ce72@gandalf.local.home> <20190501131117.GW2623@hirez.programming.kicks-ass.net> <20190501151330.023cc620@gandalf.local.home> Message-ID: <20190501194132.GX7905@worktop.programming.kicks-ass.net> Content-Type: text/plain; charset="UTF-8" Message-ID: <20190501194132.1mk18RKtqIn_ZX568Gw-lbzRbLb56fX2PI-NkbMiTtk@z> On Wed, May 01, 2019@09:33:28PM +0200, Jiri Kosina wrote: > On Wed, 1 May 2019, Steven Rostedt wrote: > > > I never tested the 32 bit version of this. And we could just not > > implement it (I don't think there's live kernel patching for it > > either). > > That's correct, there is no livepatching on x86_32 (and no plans for > it). CONFIG_LIVEPATCH is not available for 32bit builds at all. We still want this for static_call(), even on 32bit.