linux-kernel - Re: [RFC][PATCH 12/17] x86/cpu: Rename original retbleed return thunk

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Message-ID: <20230809142031.jkj4pa2mhccrdmmd@treble>
Date:   Wed, 9 Aug 2023 10:20:31 -0400
From:   Josh Poimboeuf <jpoimboe@...nel.org>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     x86@...nel.org, linux-kernel@...r.kernel.org, David.Kaplan@....com,
        Andrew.Cooper3@...rix.com, gregkh@...uxfoundation.org
Subject: Re: [RFC][PATCH 12/17] x86/cpu: Rename original retbleed return thunk

On Wed, Aug 09, 2023 at 09:12:30AM +0200, Peter Zijlstra wrote:
> +++ b/tools/objtool/check.c
> @@ -455,7 +455,12 @@ static int decode_instructions(struct ob
>  				return -1;
>  			}
>  
> -			if (func->return_thunk || !strcmp(func->name, "srso_safe_ret") || func->alias != func)
> +			/*
> +			 * Both zen_return_thunk() and srso_safe_ret() are embedded inside
> +			 * another instruction and objtool doesn't grok that. Skip validating them.
> +			 */
> +			if (!strcmp(func->name, "zen_return_thunk") ||
> +			    !strcmp(func->name, "srso_safe_ret") || func->alias != func)

Hm, speaking of renaming they should probably be called
retbleed_return_thunk() and srso_return_thunk().

-- 
Josh