linux-kernel - Re: [PATCH] MIPS: Loongson64: Fix build error 'secondary_kexec

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <1e8a74a8-3139-c77a-3eab-4ae0ff42ee0b@infradead.org>
Date:   Wed, 5 May 2021 19:19:27 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Youling Tang <tangyouling@...ngson.cn>,
        Huacai Chen <chenhuacai@...nel.org>,
        Jiaxun Yang <jiaxun.yang@...goat.com>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Cc:     linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] MIPS: Loongson64: Fix build error 'secondary_kexec_args'
 undeclared under !SMP

On 5/5/21 7:02 PM, Youling Tang wrote:
> On the Loongson64 platform, if CONFIG_SMP is not set, the following build
> error will occur:
> arch/mips/loongson64/reset.c:133:2: error:'secondary_kexec_args' undeclared
> 
> Because the definition and declaration of secondary_kexec_args are in the
> CONFIG_SMP, the secondary_kexec_args variable should be used in CONFIG_SMP.
> 
> Reported-by: kernel test robot <lkp@...el.com>
> Signed-off-by: Youling Tang <tangyouling@...ngson.cn>
> ---
>  arch/mips/loongson64/reset.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/mips/loongson64/reset.c b/arch/mips/loongson64/reset.c
> index c97bfdc..758d5d2 100644
> --- a/arch/mips/loongson64/reset.c
> +++ b/arch/mips/loongson64/reset.c
> @@ -126,11 +126,12 @@ static void loongson_kexec_shutdown(void)
>  	for_each_possible_cpu(cpu)
>  		if (!cpu_online(cpu))
>  			cpu_device_up(get_cpu_device(cpu));
> +
> +	secondary_kexec_args[0] = TO_UNCAC(0x3ff01000);
>  #endif
>  	kexec_args[0] = kexec_argc;
>  	kexec_args[1] = fw_arg1;
>  	kexec_args[2] = fw_arg2;
> -	secondary_kexec_args[0] = TO_UNCAC(0x3ff01000);
>  	memcpy((void *)fw_arg1, kexec_argv, KEXEC_ARGV_SIZE);
>  	memcpy((void *)fw_arg2, kexec_envp, KEXEC_ENVP_SIZE);
>  }
> @@ -141,7 +142,9 @@ static void loongson_crash_shutdown(struct pt_regs *regs)
>  	kexec_args[0] = kdump_argc;
>  	kexec_args[1] = fw_arg1;
>  	kexec_args[2] = fw_arg2;
> +#ifdef CONFIG_SMP
>  	secondary_kexec_args[0] = TO_UNCAC(0x3ff01000);
> +#endif
>  	memcpy((void *)fw_arg1, kdump_argv, KEXEC_ARGV_SIZE);
>  	memcpy((void *)fw_arg2, kexec_envp, KEXEC_ENVP_SIZE);
>  }
> 


Acked-by: Randy Dunlap <rdunlap@...radead.org>

Yep, slightly better than my version:
https://lore.kernel.org/lkml/20210430205055.13594-1-rdunlap@infradead.org/

-- 
~Randy