linux-kernel - Re: [PATCH] Fix initializing a static union variable

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Message-ID: <ZnVe5JBIBGoOrk5w@gondor.apana.org.au>
Date: Fri, 21 Jun 2024 21:07:16 +1000
From: Herbert Xu <herbert@...dor.apana.org.au>
To: Nick Desaulniers <ndesaulniers@...gle.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Yabin Cui <yabinc@...gle.com>,
	Steffen Klassert <steffen.klassert@...unet.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Nathan Chancellor <nathan@...nel.org>,
	Bill Wendling <morbo@...gle.com>,
	Justin Stitt <justinstitt@...gle.com>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, llvm@...ts.linux.dev
Subject: Re: [PATCH] Fix initializing a static union variable

On Thu, Jun 20, 2024 at 12:31:46PM -0700, Nick Desaulniers wrote:
>
> Can you also please (find or) file a bug against clang about this? A
> compiler diagnostic would be very very helpful here, since `= {};` is
> such a common idiom.

This idiom is used throughout the kernel.  If we decide that it
isn't safe to use then we should change the kernel as a whole rather
than the one spot that happens to have been identified.

Alternatively the buggy compiler should be banned until it's fixed.

Cheers,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt