[PATCH] fs/compat_rw_copy_check_uvector: add missing compat_ptr call

[Heiko Carstens <heiko.carstens@de.ibm.com>]

From: Heiko Carstens <heiko.carstens@de.ibm.com>

A call to access_ok is missing a compat_ptr conversion. Introduced with
b83733639a494d5f42fa00a2506563fbd2d3015d "compat: factor out
compat_rw_copy_check_uvector from compat_do_readv_writev"

fs/compat.c: In function 'compat_rw_copy_check_uvector':
fs/compat.c:629: warning: passing argument 1 of '__access_ok' makes pointer from integer without a cast

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Jeff Moyer <jmoyer@redhat.com>
---

Probably should go into stable like the original patch.

 fs/compat.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/compat.c
+++ b/fs/compat.c
@@ -626,7 +626,7 @@ ssize_t compat_rw_copy_check_uvector(int
 		tot_len += len;
 		if (tot_len < tmp) /* maths overflow on the compat_ssize_t */
 			goto out;
-		if (!access_ok(vrfy_dir(type), buf, len)) {
+		if (!access_ok(vrfy_dir(type), compat_ptr(buf), len)) {
 			ret = -EFAULT;
 			goto out;
 		}