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Date: Wed, 22 Jul 2015 06:25:48 +0200
From: Borislav Petkov <bp@alien8.de>
To: Andy Lutomirski <luto@amacapital.net>
Cc: Michal Marek <mmarek@suse.cz>, Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Josh Poimboeuf <jpoimboe@redhat.com>,
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        "H. Peter Anvin" <hpa@zytor.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Peter Zijlstra <peterz@infradead.org>
Subject: Re: [RFC PATCH 04/21] x86/hweight: Add stack frame dependency for
 __arch_hweight*()
Message-ID: <20150722042548.GB6345@nazgul.tnic>
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On Tue, Jul 21, 2015 at 05:13:12PM -0700, Andy Lutomirski wrote:
> Enough for oopses, perhaps, but maybe not enough for perf.
> 
> It sounds like you want CFI unwinding :)

What would you want to unwind in those __sw_hweight* almost-trivial,
tail functions?

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
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