linux-kernel - Re: [PATCH] ARM: bcm: fix __iomem annotation on kona

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: <54862498.8080101@gmail.com>
Date:	Mon, 08 Dec 2014 14:22:16 -0800
From:	Florian Fainelli <f.fainelli@...il.com>
To:	Olof Johansson <olof@...om.net>, arm@...nel.org
CC:	mporter@...aro.org, bcm-kernel-feedback-list@...adcom.com,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	Scott Branden <sbranden@...adcom.com>
Subject: Re: [PATCH] ARM: bcm: fix __iomem annotation on kona_smc

On 08/12/14 13:45, Olof Johansson wrote:
> Fixes the following sparse warning:
> arch/arm/mach-bcm/bcm_kona_smc.c:145:21: warning: incorrect type in initializer (different address spaces)
> arch/arm/mach-bcm/bcm_kona_smc.c:145:21:    expected unsigned int [usertype] *args
> arch/arm/mach-bcm/bcm_kona_smc.c:145:21:    got void [noderef] <asn:2>*static [toplevel] [assigned] bcm_smc_buffer
> arch/arm/mach-bcm/bcm_kona_smc.c:151:9: warning: incorrect type in argument 2 (different address spaces)
> arch/arm/mach-bcm/bcm_kona_smc.c:151:9:    expected void volatile [noderef] <asn:2>*addr
> arch/arm/mach-bcm/bcm_kona_smc.c:151:9:    got unsigned int [usertype] *
> [+ 2 more instances]
> 
> Signed-off-by: Olof Johansson <olof@...om.net>
> ---
> 
> Florian, should we just apply this directly on arm-soc?

Yes please.

> 
> 
> -Olof
> 
>  arch/arm/mach-bcm/bcm_kona_smc.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm/mach-bcm/bcm_kona_smc.c b/arch/arm/mach-bcm/bcm_kona_smc.c
> index a55a7ec..d506d17 100644
> --- a/arch/arm/mach-bcm/bcm_kona_smc.c
> +++ b/arch/arm/mach-bcm/bcm_kona_smc.c
> @@ -142,7 +142,7 @@ static int bcm_kona_do_smc(u32 service_id, u32 buffer_phys)
>  static void __bcm_kona_smc(void *info)
>  {
>  	struct bcm_kona_smc_data *data = info;
> -	u32 *args = bcm_smc_buffer;
> +	u32 __iomem *args = bcm_smc_buffer;

Your fix looks good to me, although the original code sounds a little
dubious, especially in LPAE environment.

>  
>  	BUG_ON(smp_processor_id() != 0);
>  	BUG_ON(!args);
> 

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/