From: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Preparation for the change of calling conventions; right now all
callers pass 0 as initial sum. Passing 0xffffffff instead yields
the values comparable mod 0xffff and guarantees that 0 will not
be returned on success.
Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
---
lib/iov_iter.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/lib/iov_iter.c b/lib/iov_iter.c
index 7405922caaec..d5b7e204fea6 100644
--- a/lib/iov_iter.c
+++ b/lib/iov_iter.c
@@ -1451,7 +1451,7 @@ size_t csum_and_copy_from_iter(void *addr, size_t bytes, __wsum *csum,
int err = 0;
next = csum_and_copy_from_user(v.iov_base,
(to += v.iov_len) - v.iov_len,
- v.iov_len, 0, &err);
+ v.iov_len, ~0U, &err);
if (!err) {
sum = csum_block_add(sum, next, off);
off += v.iov_len;
@@ -1493,7 +1493,7 @@ bool csum_and_copy_from_iter_full(void *addr, size_t bytes, __wsum *csum,
int err = 0;
next = csum_and_copy_from_user(v.iov_base,
(to += v.iov_len) - v.iov_len,
- v.iov_len, 0, &err);
+ v.iov_len, ~0U, &err);
if (err)
return false;
sum = csum_block_add(sum, next, off);
@@ -1539,7 +1539,7 @@ size_t csum_and_copy_to_iter(const void *addr, size_t bytes, void *csump,
int err = 0;
next = csum_and_copy_to_user((from += v.iov_len) - v.iov_len,
v.iov_base,
- v.iov_len, 0, &err);
+ v.iov_len, ~0U, &err);
if (!err) {
sum = csum_block_add(sum, next, off);
off += v.iov_len;
--
2.11.0
