This regression has been introduced in
commit f56f821feb7b36223f309e0ec05986bb137ce418
Author: Daniel Vetter <daniel.vetter@xxxxxxxx>
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@xxxxxxxxxxxxxx
Signed-Off-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
---
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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