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Re: [PATCH -v2] x86/hweight: Get rid of the special calling convention

From Borislav Petkov <bp@suse.de>
Newsgroups linux.kernel
Subject Re: [PATCH -v2] x86/hweight: Get rid of the special calling convention
Date 2016-05-10 21:10 +0200
Message-ID <rxlcD-uF-31@gated-at.bofh.it> (permalink)
References (5 earlier) <rvbAK-2kO-19@gated-at.bofh.it> <rvrcu-B8-23@gated-at.bofh.it> <rvs8y-1oa-27@gated-at.bofh.it> <rxjaP-6ly-9@gated-at.bofh.it> <rxjDP-75T-1@gated-at.bofh.it>
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On Tue, May 10, 2016 at 07:23:13PM +0200, Peter Zijlstra wrote:
> So what was wrong with using the normal thunk_*.S wrappers for the
> calls? That would allow you to use the alternative() stuff which does
> generate smaller code.

Yeah, so a full allyesconfig vmlinux gives ~22K .text size increase:

   text    data     bss     dec     hex filename
85391772        105899159       70717440        262008371       f9dee33 vmlinux 	before
85413991        105899223       70746112        262059326       f9eb53e vmlinux		after
--------
   22219

I guess I better try the thunk stuff, might make it smaller.

Also, in the next version I'll split out the static_cpu_has() move into
a separate patch, as you requested on IRC.

Thanks.

-- 
Regards/Gruss,
    Boris.

SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
--

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[RFC PATCH] x86/hweight: Get rid of the special calling convention Borislav Petkov <bp@suse.de> - 2016-05-04 20:50 +0200
  Re: [RFC PATCH] x86/hweight: Get rid of the special calling convention Brian Gerst <brgerst@gmail.com> - 2016-05-04 21:40 +0200
    Re: [RFC PATCH] x86/hweight: Get rid of the special calling  convention "H. Peter Anvin" <hpa@zytor.com> - 2016-05-04 21:40 +0200
      Re: [RFC PATCH] x86/hweight: Get rid of the special calling  convention Borislav Petkov <bp@suse.de> - 2016-05-04 21:50 +0200
        Re: [RFC PATCH] x86/hweight: Get rid of the special calling  convention "H. Peter Anvin" <hpa@zytor.com> - 2016-05-04 22:00 +0200
          Re: [RFC PATCH] x86/hweight: Get rid of the special calling  convention Borislav Petkov <bp@suse.de> - 2016-05-04 22:30 +0200
            Re: [RFC PATCH] x86/hweight: Get rid of the special calling  convention "H. Peter Anvin" <hpa@zytor.com> - 2016-05-04 23:00 +0200
            Re: [RFC PATCH] x86/hweight: Get rid of the special calling  convention Andi Kleen <andi@firstfloor.org> - 2016-05-04 23:20 +0200
            Re: [RFC PATCH] x86/hweight: Get rid of the special calling convention Denys Vlasenko <dvlasenk@redhat.com> - 2016-05-05 15:10 +0200
              Re: [RFC PATCH] x86/hweight: Get rid of the special calling  convention Borislav Petkov <bp@suse.de> - 2016-05-05 16:10 +0200
                [PATCH -v2] x86/hweight: Get rid of the special calling convention Borislav Petkov <bp@suse.de> - 2016-05-10 19:00 +0200
                Re: [PATCH -v2] x86/hweight: Get rid of the special calling  convention Peter Zijlstra <peterz@infradead.org> - 2016-05-10 19:30 +0200
                Re: [PATCH -v2] x86/hweight: Get rid of the special calling convention "H. Peter Anvin" <hpa@zytor.com> - 2016-05-10 21:10 +0200
                Re: [PATCH -v2] x86/hweight: Get rid of the special calling  convention Borislav Petkov <bp@suse.de> - 2016-05-10 21:20 +0200
                Re: [PATCH -v2] x86/hweight: Get rid of the special calling  convention "H. Peter Anvin" <hpa@zytor.com> - 2016-05-11 00:40 +0200
                Re: [PATCH -v2] x86/hweight: Get rid of the special calling  convention Borislav Petkov <bp@suse.de> - 2016-05-11 06:20 +0200
                Re: [PATCH -v2] x86/hweight: Get rid of the special calling convention Brian Gerst <brgerst@gmail.com> - 2016-05-11 13:20 +0200
                Re: [PATCH -v2] x86/hweight: Get rid of the special calling  convention Peter Zijlstra <peterz@infradead.org> - 2016-05-11 13:30 +0200
                Re: [PATCH -v2] x86/hweight: Get rid of the special calling  convention Borislav Petkov <bp@suse.de> - 2016-05-11 14:50 +0200
                Re: [PATCH -v2] x86/hweight: Get rid of the special calling convention "H. Peter Anvin" <hpa@zytor.com> - 2016-05-12 07:00 +0200
                Re: [PATCH -v2] x86/hweight: Get rid of the special calling  convention Borislav Petkov <bp@suse.de> - 2016-05-12 14:00 +0200
                Re: [PATCH -v2] x86/hweight: Get rid of the special calling  convention Peter Zijlstra <peterz@infradead.org> - 2016-05-12 14:20 +0200
                Re: [PATCH -v2] x86/hweight: Get rid of the special calling  convention Borislav Petkov <bp@suse.de> - 2016-05-10 21:10 +0200

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