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Subject: Re: [PATCH v2] Fix display of Maximum Memory
To:     Michael Bringmann <mwb@linux.ibm.com>,
        linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
        Michael Ellerman <mpe@ellerman.id.au>,
        Gustavo Walbon <gwalbon@linux.ibm.com>,
        Paul Mackerras <paulus@samba.org>
References: <5577aef8-1d5a-ca95-ff0a-9c7b5977e5bf@linux.ibm.com>
From:   Christophe Leroy <christophe.leroy@c-s.fr>
Message-ID: <9a3b1c39-8c4f-6376-ff00-2e06190d0c67@c-s.fr>
Date:   Wed, 15 Jan 2020 15:55:54 +0100
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Le 15/01/2020 à 15:53, Michael Bringmann a écrit :
> Correct overflow problem in calculation+display of Maximum Memory
> value to syscfg where 32bits is insufficient.
> 
> Signed-off-by: Michael Bringmann <mwb@linux.ibm.com>

Reviewed-by: Christophe Leroy <christophe.leroy@c-s.fr>

> ---
>   arch/powerpc/platforms/pseries/lparcfg.c | 8 ++++----
>   1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/arch/powerpc/platforms/pseries/lparcfg.c b/arch/powerpc/platforms/pseries/lparcfg.c
> index e33e8bc..f00411c 100644
> --- a/arch/powerpc/platforms/pseries/lparcfg.c
> +++ b/arch/powerpc/platforms/pseries/lparcfg.c
> @@ -433,12 +433,12 @@ static void parse_em_data(struct seq_file *m)
>   
>   static void maxmem_data(struct seq_file *m)
>   {
> -	unsigned long maxmem = 0;
> +	u64 maxmem = 0;
>   
> -	maxmem += drmem_info->n_lmbs * drmem_info->lmb_size;
> -	maxmem += hugetlb_total_pages() * PAGE_SIZE;
> +	maxmem += (u64)drmem_info->n_lmbs * drmem_info->lmb_size;
> +	maxmem += (u64)hugetlb_total_pages() * PAGE_SIZE;
>   
> -	seq_printf(m, "MaxMem=%ld\n", maxmem);
> +	seq_printf(m, "MaxMem=%llu\n", maxmem);
>   }
>   
>   static int pseries_lparcfg_data(struct seq_file *m, void *v)
>