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	Sun, 11 Jan 2026 18:51:39 +0000
Date: Sun, 11 Jan 2026 18:51:39 +0000
From: Al Viro <viro@zeniv.linux.org.uk>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Eric Dumazet <edumazet@google.com>, oe-kbuild-all@lists.linux.dev,
	linux-kernel@vger.kernel.org, Jakub Kicinski <kuba@kernel.org>,
	Maciej =?utf-8?Q?=C5=BBenczykowski?= <maze@google.com>,
	Will Deacon <will@kernel.org>,
	"Paul E. McKenney" <paulmck@kernel.org>,
	Peter Zijlstra <peterz@infradead.org>
Subject: Re: include/net/sock.h:2100:16: sparse: sparse: cast to non-scalar
Message-ID: <20260111185139.GI3634291@ZenIV>
References: <202601110443.5ENBRFej-lkp@intel.com>
 <20260110221508.GF3634291@ZenIV>
 <20260110223548.GA4041651@ZenIV>
 <20260111182010.GH3634291@ZenIV>
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Sender: Al Viro <viro@ftp.linux.org.uk>

On Sun, Jan 11, 2026 at 06:20:10PM +0000, Al Viro wrote:

> Guys, do you have any problems with replacing __unqual_scalar_typeof()
> uses with that thing?
> 
> As in,#ifndef __smp_load_acquire
> #define __smp_load_acquire(p)                                           \
> ({                                                                      \
>         unqual_non_array(__typeof__(*p)) ___p1 = READ_ONCE(*p);         \
> ...
> 
> Objections?  IMO it's more palatable than current __unqual_scalar_typeof()...

Argh...  gcc prior to 8.4 fucks it up, and our minimum is 8.1 ;-/
Pity, that...  I still think it's worth keeping in mind for when
we bump the minimal gcc revision, though.

FWIW, with clang it works all way back at least to 3.1; icc - at least
to 13.0.1...