linux-kernel - Re: [GIT PULL] uml-for-6.16-rc4

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Message-ID: <CAHk-=wjTCAzaw4AXXpxcYc7v7ZjAeyaOOJw7FWXO+gV7v7Cp0g@mail.gmail.com>
Date: Wed, 25 Jun 2025 11:17:37 -0700
From: Linus Torvalds <torvalds@...ux-foundation.org>
To: Johannes Berg <johannes@...solutions.net>
Cc: linux-kernel@...r.kernel.org, linux-um@...ts.infradead.org, 
	Richard Weinberger <richard@....at>, Anton Ivanov <anton.ivanov@...bridgegreys.com>
Subject: Re: [GIT PULL] uml-for-6.16-rc4

On Wed, 25 Jun 2025 at 05:15, Johannes Berg <johannes@...solutions.net> wrote:
>
>  - reduce stack use with clang 19

Interesting. The patch looks fine, I'm wondering if people made a
clang bug report about this behavior with structure assignments?

Even if most other projects likely don't have issues with stack size,
it looks very non-optimal from a performance standpoint too to create
a pointless temporary copy on the stack.

I assume - but didn't check - that gcc didn't do the same stupid thing
for that code?

          Linus