linux-kernel - Re: [PATCH -next v5 3/8] arm64: extable: move _cond_extable to _cond_uaccess

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Date:   Fri, 17 Jun 2022 09:31:32 +0100
From:   Mark Rutland <mark.rutland@....com>
To:     Tong Tiangen <tongtiangen@...wei.com>
Cc:     James Morse <james.morse@....com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Robin Murphy <robin.murphy@....com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Michael Ellerman <mpe@...erman.id.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>, x86@...nel.org,
        "H . Peter Anvin" <hpa@...or.com>, linuxppc-dev@...ts.ozlabs.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, Kefeng Wang <wangkefeng.wang@...wei.com>,
        Xie XiuQi <xiexiuqi@...wei.com>,
        Guohanjun <guohanjun@...wei.com>
Subject: Re: [PATCH -next v5 3/8] arm64: extable: move _cond_extable to
 _cond_uaccess_extable

On Sat, May 28, 2022 at 06:50:51AM +0000, Tong Tiangen wrote:
> Currently, We use _cond_extable for cache maintenance uaccess helper
> caches_clean_inval_user_pou(), so this should be moved over to
> EX_TYPE_UACCESS_ERR_ZERO and rename _cond_extable to _cond_uaccess_extable
> for clarity.
> 
> Suggested-by: Mark Rutland <mark.rutland@....com>
> Signed-off-by: Tong Tiangen <tongtiangen@...wei.com>

Acked-by: Mark Rutland <mark.rutland@....com>

Mark.

> ---
>  arch/arm64/include/asm/asm-extable.h | 6 +++---
>  arch/arm64/include/asm/assembler.h   | 4 ++--
>  2 files changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/arch/arm64/include/asm/asm-extable.h b/arch/arm64/include/asm/asm-extable.h
> index 9c94ac1f082c..d01bd94cc4c2 100644
> --- a/arch/arm64/include/asm/asm-extable.h
> +++ b/arch/arm64/include/asm/asm-extable.h
> @@ -40,9 +40,9 @@
>   * Create an exception table entry for `insn` if `fixup` is provided. Otherwise
>   * do nothing.
>   */
> -	.macro		_cond_extable, insn, fixup
> -	.ifnc		\fixup,
> -	_asm_extable	\insn, \fixup
> +	.macro		_cond_uaccess_extable, insn, fixup
> +	.ifnc			\fixup,
> +	_asm_extable_uaccess	\insn, \fixup
>  	.endif
>  	.endm
>  
> diff --git a/arch/arm64/include/asm/assembler.h b/arch/arm64/include/asm/assembler.h
> index 8c5a61aeaf8e..dc422fa437c2 100644
> --- a/arch/arm64/include/asm/assembler.h
> +++ b/arch/arm64/include/asm/assembler.h
> @@ -423,7 +423,7 @@ alternative_endif
>  	b.lo	.Ldcache_op\@
>  	dsb	\domain
>  
> -	_cond_extable .Ldcache_op\@, \fixup
> +	_cond_uaccess_extable .Ldcache_op\@, \fixup
>  	.endm
>  
>  /*
> @@ -462,7 +462,7 @@ alternative_endif
>  	dsb	ish
>  	isb
>  
> -	_cond_extable .Licache_op\@, \fixup
> +	_cond_uaccess_extable .Licache_op\@, \fixup
>  	.endm
>  
>  /*
> -- 
> 2.25.1
>