linux-kernel - Re: [RFC][PATCH] tree-wide: Remove __inline__ and _

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Message-ID: <CANiq72=VUEvPJf_U8s+FJbdj7pbEpsxepFaduUoW7Ov_arnRGA@mail.gmail.com>
Date:   Tue, 6 Nov 2018 15:09:37 +0100
From:   Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Borislav Petkov <bp@...en8.de>, namit@...are.com,
        Joe Perches <joe@...ches.com>, segher@...nel.crashing.org,
        Ingo Molnar <mingo@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [RFC][PATCH] tree-wide: Remove __inline__ and __inline usage

On Tue, Nov 6, 2018 at 11:02 AM Peter Zijlstra <peterz@...radead.org> wrote:
>
> allows adding the "inline" keyword to 'asm ("")' statements. The
> problem is that we're possibly redefining "inline" to
> "inline __attribute__((__always_inline__))" which makes the proposed:
>
>   asm volatile inline ("")
>
> (...)
>
> -#define inline inline
> -#define inline   inline
> -

It seems somehow your patch got underscores removed.

By the way, we have been re#defining the inline keyword since (at
least) 2003, and already in 2008 Ingo was commenting in a commit to
add the #ifdef to avoid it for x86. Is it still a good idea nowadays
that the minimum compiler is quite modern compare to a decade ago? Is
it still needed on non-x86 arches (they don't have it in the
defconfig)? Couldn't functions be marked as __always_inline if really
needed (as many are)?

By the way (x2): CONFIG_ARCH_SUPPORTS_OPTIMIZED_INLINING is only ever
referenced in that #ifdef. May it be removed?

Cheers,
Miguel