From: Segher Boessenkool <segher@kernel.crashing.org>
To: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Paul Mackerras <paulus@samba.org>,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] powerpc: force inlining of csum_partial() to avoid multiple csum_partial() with GCC10
Date: Thu, 15 Oct 2020 08:25:12 -0500 [thread overview]
Message-ID: <20201015132512.GG2672@gate.crashing.org> (raw)
In-Reply-To: <a1d31f84ddb0926813b17fcd5cc7f3fa7b4deac2.1602759123.git.christophe.leroy@csgroup.eu>
Hi!
On Thu, Oct 15, 2020 at 10:52:20AM +0000, Christophe Leroy wrote:
> With gcc9 I get:
<snip>
> With gcc10 I get:
<snip>
> gcc10 defines multiple versions of csum_partial() which are just
> an unconditionnal branch to __csum_partial().
It doesn't inline it, yes.
Could you open a GCC PR for this please?
> To enforce inlining of that branch to __csum_partial(),
> mark csum_partial() as __always_inline.
That should be fine of course, but it would be good if we could fix this
in the compiler :-)
Reviewed-by: Segher Boessenkool <segher@kernel.crashing.org>
Segher
WARNING: multiple messages have this Message-ID (diff)
From: Segher Boessenkool <segher@kernel.crashing.org>
To: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] powerpc: force inlining of csum_partial() to avoid multiple csum_partial() with GCC10
Date: Thu, 15 Oct 2020 08:25:12 -0500 [thread overview]
Message-ID: <20201015132512.GG2672@gate.crashing.org> (raw)
In-Reply-To: <a1d31f84ddb0926813b17fcd5cc7f3fa7b4deac2.1602759123.git.christophe.leroy@csgroup.eu>
Hi!
On Thu, Oct 15, 2020 at 10:52:20AM +0000, Christophe Leroy wrote:
> With gcc9 I get:
<snip>
> With gcc10 I get:
<snip>
> gcc10 defines multiple versions of csum_partial() which are just
> an unconditionnal branch to __csum_partial().
It doesn't inline it, yes.
Could you open a GCC PR for this please?
> To enforce inlining of that branch to __csum_partial(),
> mark csum_partial() as __always_inline.
That should be fine of course, but it would be good if we could fix this
in the compiler :-)
Reviewed-by: Segher Boessenkool <segher@kernel.crashing.org>
Segher
next prev parent reply other threads:[~2020-10-15 13:30 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-15 10:52 [PATCH] powerpc: force inlining of csum_partial() to avoid multiple csum_partial() with GCC10 Christophe Leroy
2020-10-15 10:52 ` Christophe Leroy
2020-10-15 13:25 ` Segher Boessenkool [this message]
2020-10-15 13:25 ` Segher Boessenkool
2020-10-15 13:32 ` Christophe Leroy
2020-10-15 13:32 ` Christophe Leroy
2020-10-15 13:59 ` Christophe Leroy
2020-10-15 13:59 ` Christophe Leroy
2020-12-21 11:03 ` Michael Ellerman
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