Re: [tip: x86/asm] x86/asm: Make ASM_CALL_CONSTRAINT conditional on frame pointers
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- Subject: Re: [tip: x86/asm] x86/asm: Make ASM_CALL_CONSTRAINT conditional on frame pointers
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Tue, 4 Mar 2025 00:57:49 +0000
- Cc: brgerst@xxxxxxxxx, jpoimboe@xxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-tip-commits@xxxxxxxxxxxxxxx, mingo@xxxxxxxxxx, peterz@xxxxxxxxxxxxx, tip-bot2@xxxxxxxxxxxxx, torvalds@xxxxxxxxxxxxxxxxxxxx, x86@xxxxxxxxxx
- In-reply-to: <28D821BB-96B5-4389-839E-5B7CB4D49F5F@zytor.com>
- References: <28D821BB-96B5-4389-839E-5B7CB4D49F5F@zytor.com>
- User-agent: Mozilla Thunderbird
> One more thing: if we remove ASM_CALL_CONSTRAINTS, we will not be able to use the redzone in future FRED only kernel builds.
That's easy enough to fix with "|| CONFIG_FRED_EXCLUSIVE" in some
theoretical future when it's a feasible config to use.
~Andrew
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