linux-kernel - [PATCH 5/7] x86, xsave: keep _

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Date:	Sun,  2 Sep 2012 23:31:44 +0200
From:	Mathias Krause <minipli@...glemail.com>
To:	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>
Cc:	x86@...nel.org, linux-kernel@...r.kernel.org,
	Mathias Krause <minipli@...glemail.com>
Subject: [PATCH 5/7] x86, xsave: keep __user annotation in casts

Don't remove the __user annotation of the fpstate pointer, but drop the
superfluous void * cast instead.

This fixes the following sparse warnings:

xsave.c:135:15: warning: cast removes address space of expression
xsave.c:135:15: warning: incorrect type in argument 1 (different address spaces)
xsave.c:135:15:    expected void const volatile [noderef] <asn:1>*<noident>
xsave.c:135:15:    got unsigned int [usertype] *<noident>
xsave.c:135:15: warning: cast removes address space of expression
xsave.c:135:15: warning: cast removes address space of expression
xsave.c:135:15: warning: cast removes address space of expression
xsave.c:135:15: warning: cast removes address space of expression
xsave.c:135:15: warning: cast removes address space of expression
xsave.c:135:15: warning: cast removes address space of expression

Signed-off-by: Mathias Krause <minipli@...glemail.com>
---
 arch/x86/kernel/xsave.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kernel/xsave.c b/arch/x86/kernel/xsave.c
index 3d3e207..9e1a8a7 100644
--- a/arch/x86/kernel/xsave.c
+++ b/arch/x86/kernel/xsave.c
@@ -132,9 +132,9 @@ int check_for_xstate(struct i387_fxsave_struct __user *buf,
 	    fx_sw_user->xstate_size > fx_sw_user->extended_size)
 		return -EINVAL;
 
-	err = __get_user(magic2, (__u32 *) (((void *)fpstate) +
-					    fx_sw_user->extended_size -
-					    FP_XSTATE_MAGIC2_SIZE));
+	err = __get_user(magic2, (__u32 __user *) (fpstate +
+						   fx_sw_user->extended_size -
+						   FP_XSTATE_MAGIC2_SIZE));
 	if (err)
 		return err;
 	/*
-- 
1.7.10.4

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