From: Russ Cox <rsc@swtch.com>
Date: Mon, 26 Mar 2007 15:23:56 +0000 (-0400)
Subject: [PATCH] Add const to pointer qualifiers for __chk_user_ptr and __chk_io_ptr.
X-Git-Tag: v2.6.21-rc6~118
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=04a395233089ed160ef87a6c2155e5dedc6f7d15;p=linux-2.6

[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@swtch.com>
Signed-off-by: Josh Triplett <josh@freedesktop.org>
Acked-by: Christopher Li <sparse@chrisli.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index aca66984aa..3b6949b417 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