linux-kernel - Re: [PATCH] staging: lustre: Fix the warning messages about casting without _

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Date:	Wed, 10 Dec 2014 07:09:59 +0000
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Shalin Mehta <shalinmehta85@...il.com>
Cc:	andreas.dilger@...el.com, gregkh@...uxfoundation.org,
	bergwolf@...il.com, gdonald@...il.com, peterz@...radead.org,
	tranmanphong@...il.com, massa.nomura@...il.com,
	HPDD-discuss@...1.01.org, devel@...verdev.osuosl.org,
	linux-kernel@...r.kernel.org, majordomo@...r.kernel.org
Subject: Re: [PATCH] staging: lustre: Fix the warning messages about casting
 without __user macro

On Tue, Dec 09, 2014 at 10:56:12PM -0800, Shalin Mehta wrote:
> From: Shalin Mehta <shalinmehta85@...il.com>
> 
> This issue is showed up while compiling with sparse. The iov_base in struct iovec struct explicitly declares that the assigned value should be user space pointer with __user macro. Where as here, the __user macro isn't used while casting.

... and pointers are not user space ones at all.  Which is to say, quit
messing with casts; it's not struct iovec.  Proper fix is to replace
it here (and in almost all places throughout drivers/staging/lustre) with
struct kvec.  And yes, such a patch had been sent.  Still not applied,
AFAICS...
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