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Date: Mon, 22 Jul 2013 12:21:48 +0200 From: Ingo Molnar <mingo@...nel.org> To: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com> Cc: Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org, "H. Peter Anvin" <hpa@...ux.intel.com>, Jiri Kosina <jkosina@...e.cz>, Steven Rostedt <rostedt@...dmis.org>, Jason Baron <jbaron@...mai.com>, yrl.pp-manager.tt@...achi.com, Borislav Petkov <bpetkov@...e.de> Subject: Re: [PATCH -tip 3/3] x86: Remove unused text_poke_smp and text_poke_smp_batch * Masami Hiramatsu <masami.hiramatsu.pt@...achi.com> wrote: > (2013/07/22 19:01), Ingo Molnar wrote: > > > > * Masami Hiramatsu <masami.hiramatsu.pt@...achi.com> wrote: > > > >> (2013/07/22 17:21), Ingo Molnar wrote: > >>> > >>> * Ingo Molnar <mingo@...nel.org> wrote: > >>> > >>>> > >>>> * Masami Hiramatsu <masami.hiramatsu.pt@...achi.com> wrote: > >>>> > >>>>> Since introducing the text_poke_bp for all text_poke_smp* > >>>>> callers, text_poke_smp* are now unused. This basically > >>>>> reverts 3d55cc8a, 7deb18dc and related commits. > >>>>> > >>>>> This also fixes a Kconfig dependency issue on STOP_MACHINE > >>>>> in the case of CONFIG_SMP && !CONFIG_MODULE_UNLOAD. > >>>>> > >>>>> Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com> > >>>>> --- > >>>>> arch/x86/Kconfig | 5 -- > >>>>> arch/x86/include/asm/alternative.h | 11 ---- > >>>>> arch/x86/kernel/alternative.c | 98 +----------------------------------- > >>>>> 3 files changed, 2 insertions(+), 112 deletions(-) > >>>> > >>>> Hm, it does not build with the attached config: > >>>> > >>>> arch/x86/kernel/kprobes/opt.c: In function 'setup_optimize_kprobe': > >>>> arch/x86/kernel/kprobes/opt.c:394:6: error: dereferencing pointer to incomplete type > >>>> arch/x86/kernel/kprobes/opt.c:395:6: error: dereferencing pointer to incomplete type > >>>> arch/x86/kernel/kprobes/opt.c:396:6: error: dereferencing pointer to incomplete type > >>> > >>> 32-bit appears to be the key pattern. > >> > >> Ingo, please make sure your x86/jumplabel tree picked all of my patches. > >> This 3/3 strongly depends on the previous 1/3 and 2/3. > >> Without it, kprobes/opt.c can not be build because it still uses the > >> text_poke_params data structure which 3/3 removes. > > > > Yes I know, and it was on top of -tip which already had these included: > > > > 51b2c07b2226 x86: Make jump_label use int3-based patching > > fd4363fff3d9 x86: Introduce int3 (breakpoint)-based instruction patching > > > > without these the third patch wouldn't even apply I think. > > No, I meant below two patches: > kprobes/x86: Remove an incorrect comment about int3 in NMI/MCE > kprobes/x86: Use text_poke_bp() instead of text_poke_smp*() > > Since the "setup_optimize_kprobe" in the error message is completely > *removed* by the second one, the above error should not happen. Oh, indeed - I correctly applied them but then messed up the cherry-picking, that's all. So never mind, it's all fine. Thanks, Ingo -- 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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