linux-kernel - [PATCH] mm: fixup compilation error due to an asm write through a const pointer

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Message-Id: <1334419390-18961-1-git-send-email-daniel.vetter@ffwll.ch>
Date:	Sat, 14 Apr 2012 18:03:10 +0200
From:	Daniel Vetter <daniel.vetter@...ll.ch>
To:	Dave Airlie <airlied@...il.com>
Cc:	DRI Development <dri-devel@...ts.freedesktop.org>,
	Intel Graphics Development <intel-gfx@...ts.freedesktop.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Linux MM <linux-mm@...ck.org>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Daniel Vetter <daniel.vetter@...ll.ch>
Subject: [PATCH] mm: fixup compilation error due to an asm write through a const pointer

This regression has been introduced in

commit f56f821feb7b36223f309e0ec05986bb137ce418
Author: Daniel Vetter <daniel.vetter@...ll.ch>
Date:   Sun Mar 25 19:47:41 2012 +0200

    mm: extend prefault helpers to fault in more than PAGE_SIZE

I have failed to notice this because x86 asm seems to happily compile
things as-is.

Reported-by: Geert Uytterhoeven <geert@...ux-m68k.org
Signed-Off-by: Daniel Vetter <daniel.vetter@...ll.ch>
---
 include/linux/pagemap.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index c93a9a9..efa26b4 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -461,7 +461,7 @@ static inline int fault_in_pages_readable(const char __user *uaddr, int size)
 static inline int fault_in_multipages_writeable(char __user *uaddr, int size)
 {
 	int ret;
-	const char __user *end = uaddr + size - 1;
+	char __user *end = uaddr + size - 1;
 
 	if (unlikely(size == 0))
 		return 0;
-- 
1.7.10

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