linux-kernel - [PATCH] Add const to pointer qualifiers for __chk_user_ptr and __chk_io

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Date:	Mon, 26 Mar 2007 11:23:56 -0400
From:	"Russ Cox" <rsc@...ch.com>
To:	linux-kernel@...r.kernel.org
Cc:	linux-sparse@...r.kernel.org
Subject: [PATCH] Add const to pointer qualifiers for __chk_user_ptr and __chk_io_ptr.

Change prototypes for  __chk_user_ptr and __chk_io_ptr
to take const void* instead of void*, so that code can pass
const void* to them.  (Right now sparse does not warn
about passing const void* to void* functions, but that
is a separate bug that I believe Josh is working on,
and once sparse does check this, the changed prototypes
will be necessary.)

Signed-off-by: Russ Cox <rsc@...ch.com>
Signed-off-by: Josh Triplett <josh@...edesktop.org>

---

 include/linux/compiler.h |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

e5174dfa73190036ae1086110292594a3ffb3752
diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index aca6698..3b6949b 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -15,8 +15,8 @@
 # define __acquire(x)	__context__(x,1)
 # define __release(x)	__context__(x,-1)
 # define __cond_lock(x,c)	((c) ? ({ __acquire(x); 1; }) : 0)
-extern void __chk_user_ptr(void __user *);
-extern void __chk_io_ptr(void __iomem *);
+extern void __chk_user_ptr(const void __user *);
+extern void __chk_io_ptr(const void __iomem *);
 #else
 # define __user
 # define __kernel
-- 
1.1.3
-
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