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Date: Sat, 7 Nov 2015 10:16:37 -0800 From: Andy Lutomirski <luto@...capital.net> To: Thomas Gleixner <tglx@...utronix.de> Cc: Borislav Petkov <bp@...en8.de>, Frederic Weisbecker <fweisbec@...il.com>, Brian Gerst <brgerst@...il.com>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, X86 ML <x86@...nel.org>, Peter Zijlstra <peterz@...radead.org>, Linus Torvalds <torvalds@...ux-foundation.org> Subject: Re: [PATCH 3/4] x86/asm: Add asm macros for static keys/jump labels On Sat, Nov 7, 2015 at 9:08 AM, Thomas Gleixner <tglx@...utronix.de> wrote: > On Sat, 7 Nov 2015, Andy Lutomirski wrote: >> On Sat, Nov 7, 2015 at 8:58 AM, Thomas Gleixner <tglx@...utronix.de> wrote: >> True. But I hid it in a header file, too, but it was just a different >> header file -- I had it all hidden away as CALL_ENTER_FROM_USER_MODE. > > It probably does not really make a difference :) > > I just got triggered by you saying: > >> Unfortunately, these only work if HAVE_JUMP_LABEL .... Yeah, I don't really like that either. I think that the real fix would be to compile in the runtime jump label bits unconditionally. Admittedly it would bloat the kernel image a little bit for !CONFIG_JUMP_LABEL or if build with an older gcc, and that's even less appropriate for 4.4 at this point. Peter? --Andy -- 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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