linux-kernel - Re: warning: cast removes address space '_

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Message-ID: <CAFGhKbwqrr=_bOnKW+wqtX2OyW0xpS_9wkJnHpwxmwx7MHGhfg@mail.gmail.com>
Date: Tue, 2 Apr 2024 11:53:21 +0200
From: Charlemagne Lasse <charlemagnelasse@...il.com>
To: Uros Bizjak <ubizjak@...il.com>
Cc: x86@...nel.org, LKML <linux-kernel@...r.kernel.org>, 
	Luc Van Oostenryck <lucvoo@...nel.org>, Andy Lutomirski <luto@...nel.org>, Ingo Molnar <mingo@...nel.org>, 
	Brian Gerst <brgerst@...il.com>, Denys Vlasenko <dvlasenk@...hat.com>, 
	"H . Peter Anvin" <hpa@...or.com>, Linus Torvalds <torvalds@...ux-foundation.org>, 
	Peter Zijlstra <peterz@...radead.org>, Thomas Gleixner <tglx@...utronix.de>, 
	Borislav Petkov <bp@...en8.de>, Josh Poimboeuf <jpoimboe@...hat.com>
Subject: Re: warning: cast removes address space '__percpu' of expression

Am Di., 2. Apr. 2024 um 11:43 Uhr schrieb Uros Bizjak <ubizjak@...il.com>:
[snip]
> Please try the attached patch that informs sparse about this action.

I've tested it using

```
git reset --hard v6.9-rc2
patch -p1 -i ~/p.diff.txt
git clean -dfx
make allnoconfig -j$(nproc)
make kvm_guest.config
make prepare -j$(nproc)
touch include/linux/netdevice.h
make C=1 net/core/dev.o CHECK="sparse -Wcast-from-as"
```

And it seems to work. Thanks