linux-kernel - Re: [PATCH] IB/core: avoid 32-bit warning

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Message-ID: <1444222826.3188.62.camel@opteya.com>
Date:	Wed, 07 Oct 2015 15:00:26 +0200
From:	Yann Droneaud <ydroneaud@...eya.com>
To:	Arnd Bergmann <arnd@...db.de>, Doug Ledford <dledford@...hat.com>,
	Sean Hefty <sean.hefty@...el.com>,
	Hal Rosenstock <hal.rosenstock@...il.com>
Cc:	Roland Dreier <roland@...estorage.com>, linux-rdma@...r.kernel.org,
	Matan Barak <matanb@...lanox.com>,
	Or Gerlitz <ogerlitz@...lanox.com>,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] IB/core: avoid 32-bit warning

Hi,

Le mercredi 07 octobre 2015 à 14:29 +0200, Arnd Bergmann a écrit :
> The INIT_UDATA() macro requires a pointer or unsigned long argument 
> for both input and output buffer, and all callers had a cast from 
> when the code was merged until a recent restructuring, so now we get
> 
> core/uverbs_cmd.c: In function 'ib_uverbs_create_cq':
> core/uverbs_cmd.c:1481:66: warning: cast to pointer from integer of
> different size [-Wint-to-pointer-cast]
> 
> This makes the code behave as before by adding back the cast to
> unsigned long.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> Fixes: 565197dd8fb1 ("IB/core: Extend ib_uverbs_create_cq")
> 

Reviewed-by: Yann Droneaud <ydroneaud@...eya.com>

> diff --git a/drivers/infiniband/core/uverbs_cmd.c
> b/drivers/infiniband/core/uverbs_cmd.c
> index be4cb9f04be3..88b3b78340f2 100644
> --- a/drivers/infiniband/core/uverbs_cmd.c
> +++ b/drivers/infiniband/core/uverbs_cmd.c
> @@ -1478,7 +1478,7 @@ ssize_t ib_uverbs_create_cq(struct
> ib_uverbs_file *file,
>  	if (copy_from_user(&cmd, buf, sizeof(cmd)))
>  		return -EFAULT;
>  
> -	INIT_UDATA(&ucore, buf, cmd.response, sizeof(cmd),
> sizeof(resp));
> +	INIT_UDATA(&ucore, buf, (unsigned long)cmd.response,
> sizeof(cmd), sizeof(resp));
>  
>  	INIT_UDATA(&uhw, buf + sizeof(cmd),
>  		   (unsigned long)cmd.response + sizeof(resp),
> 

Regards.

-- 
Yann Droneaud
OPTEYA

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