linux-kernel - Re: [PATCH 4/6] lib: inline _find_next

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Message-ID: <CAAH8bW8LSk4Jr_T0TZqfmzgXPQ4MMGJoN6OF664F+SGLYJG+Eg@mail.gmail.com>
Date:   Thu, 28 Jan 2021 22:41:45 -0800
From:   Yury Norov <yury.norov@...il.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     linux-m68k@...ts.linux-m68k.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-sh@...r.kernel.org, linux-arch@...r.kernel.org,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Rich Felker <dalias@...c.org>, Arnd Bergmann <arnd@...db.de>,
        Dennis Zhou <dennis@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        David Sterba <dsterba@...e.com>,
        Stefano Brivio <sbrivio@...hat.com>,
        "Ma, Jianpeng" <jianpeng.ma@...el.com>,
        Wei Yang <richard.weiyang@...ux.alibaba.com>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Rasmus Villemoes <rasmus.villemoes@...vas.dk>
Subject: Re: [PATCH 4/6] lib: inline _find_next_bit() wrappers

On Thu, Jan 21, 2021 at 2:27 AM Andy Shevchenko
<andriy.shevchenko@...ux.intel.com> wrote:
>
> On Wed, Jan 20, 2021 at 04:06:28PM -0800, Yury Norov wrote:
> > lib/find_bit.c declares five single-line wrappers for _find_next_bit().
> > We may turn those wrappers to inline functions. It eliminates
> > unneeded function calls and opens room for compile-time optimizations.
>
> ...
>
> > --- a/include/asm-generic/bitops/le.h
> > +++ b/include/asm-generic/bitops/le.h
> > @@ -4,6 +4,7 @@
> >
> >  #include <asm/types.h>
> >  #include <asm/byteorder.h>
> > +#include <asm-generic/bitops/find.h>
>
> I'm wondering if generic header inclusion should go before arch-dependent ones.
>
> ...
>
> > -#ifndef find_next_bit
>
> > -#ifndef find_next_zero_bit
>
> > -#if !defined(find_next_and_bit)
>
> > -#ifndef find_next_zero_bit_le
>
> > -#ifndef find_next_bit_le
>
> Shouldn't you leave these in new wrappers as well?
>
> --
> With Best Regards,
> Andy Shevchenko

Could you please elaborate? Wrappers in find.h are protected, functions
in lib/find_bit.c too. Maybe I misunderstood you?..