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| author |   Al Viro <viro@zeniv.linux.org.uk> | 2020-07-11 23:51:04 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2020-08-20 15:45:15 -0400 |
| commit | 99a2c96d52d312b11a943372964226fa134de3b1 (patch) | |
| tree | a3d63171689e7c7eaaeb5f617cd047f6743dc0e3 /lib/iov_iter.c | |
| parent | csum_partial_copy_nocheck(): drop the last argument (diff) | |
| download | linux-dev-99a2c96d52d312b11a943372964226fa134de3b1.tar.xz linux-dev-99a2c96d52d312b11a943372964226fa134de3b1.zip | |
csum_and_copy_..._user(): pass 0xffffffff instead of 0 as initial sum
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@zeniv.linux.org.uk>
Diffstat (limited to 'lib/iov_iter.c')
| -rw-r--r-- | lib/iov_iter.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/lib/iov_iter.c b/lib/iov_iter.c index 84f3a9156684..437fbc14c972 100644 --- a/lib/iov_iter.c +++ b/lib/iov_iter.c @@ -1452,7 +1452,7 @@ 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; @@ -1494,7 +1494,7 @@ 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); @@ -1540,7 +1540,7 @@ 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; |