This regression has been introduced in
commit f56f821feb7b36223f309e0ec05986bb137ce418 Author: Daniel Vetter daniel.vetter@ffwll.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@linux-m68k.org Signed-Off-by: Daniel Vetter daniel.vetter@ffwll.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;