linux-kernel - Re: [PATCH] arm64: smccc: Include alternative-macros.h

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Date:   Fri, 13 Jan 2023 09:59:08 +0000
From:   Will Deacon <will@...nel.org>
To:     Elliot Berman <quic_eberman@...cinc.com>
Cc:     Mark Rutland <mark.rutland@....com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Sudeep Holla <sudeep.holla@....com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: smccc: Include alternative-macros.h

On Thu, Jan 12, 2023 at 10:25:47AM -0800, Elliot Berman wrote:
> Fix build error when CONFIG_ARM64_SVE is selected and
> asm/alternative-macros.h wasn't implicitly included by another header.
> 
> ./include/linux/arm-smccc.h:387:25: error: expected string literal before `ALTERNATIVE'
>   387 | #define SMCCC_SVE_CHECK ALTERNATIVE("nop \n",  "bl __arm_smccc_sve_check \n", \
> 
> Signed-off-by: Elliot Berman <quic_eberman@...cinc.com>
> ---
>  include/linux/arm-smccc.h | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/include/linux/arm-smccc.h b/include/linux/arm-smccc.h
> index 220c8c60e021..6a627cdbbdec 100644
> --- a/include/linux/arm-smccc.h
> +++ b/include/linux/arm-smccc.h
> @@ -383,6 +383,7 @@ asmlinkage void __arm_smccc_hvc(unsigned long a0, unsigned long a1,
>  
>  /* nVHE hypervisor doesn't have a current thread so needs separate checks */
>  #if defined(CONFIG_ARM64_SVE) && !defined(__KVM_NVHE_HYPERVISOR__)
> +#include <asm/alternative-macros.h>
>  
>  #define SMCCC_SVE_CHECK ALTERNATIVE("nop \n",  "bl __arm_smccc_sve_check \n", \
>  				    ARM64_SVE)
> 
> base-commit: 68a63a412d18bd2e2577c8928139f92541afa7a6

Acked-by: Will Deacon <will@...nel.org>

Will