[tip:x86/debug] x86/vdso: Add __user annotation to VDSO32_SYMBOL

[tip-bot for Mathias Krause]

Commit-ID:  3d1334064fb365ea8f299874c2b4c46de2bee74d
Gitweb:     http://git.kernel.org/tip/3d1334064fb365ea8f299874c2b4c46de2bee74d
Author:     Mathias Krause <minipli@xxxxxxxxxxxxxx>
AuthorDate: Sun, 2 Sep 2012 23:31:41 +0200
Committer:  Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Wed, 5 Sep 2012 10:52:23 +0200

x86/vdso: Add __user annotation to VDSO32_SYMBOL

The address calculated by VDSO32_SYMBOL() is a pointer into
userland. Add the __user annotation to fix related sparse
warnings in its users.

Signed-off-by: Mathias Krause <minipli@xxxxxxxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxx>
Link: http://lkml.kernel.org/r/1346621506-30857-3-git-send-email-minipli@xxxxxxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
 arch/x86/include/asm/vdso.h |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/arch/x86/include/asm/vdso.h b/arch/x86/include/asm/vdso.h
index bb05228..fddb53d 100644
--- a/arch/x86/include/asm/vdso.h
+++ b/arch/x86/include/asm/vdso.h
@@ -11,7 +11,8 @@ extern const char VDSO32_PRELINK[];
 #define VDSO32_SYMBOL(base, name)					\
 ({									\
 	extern const char VDSO32_##name[];				\
-	(void *)(VDSO32_##name - VDSO32_PRELINK + (unsigned long)(base)); \
+	(void __user *)(VDSO32_##name - VDSO32_PRELINK +		\
+			(unsigned long)(base));				\
 })
 #endif
 
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