| commit | 0a991aed20012f2eeb79035456f5c3bcc44d64bd | |
| author | Dan Carpenter <dan.carpenter@oracle.com> | |
| Mon, 15 Jul 2013 06:16:01 +0000 (15 09:16 +0300) | ||
| committer | Dan Carpenter <dan.carpenter@oracle.com> | |
| Mon, 15 Jul 2013 06:16:01 +0000 (15 09:16 +0300) | ||
| tree | 3e21f27a884bf81988896de30b643f4a2841ff2d | treesnapshot (tar.gz zip) |
| parent | 1b25d3db20b62c7a2b669c1444adcb2e760be2e7 | commitdiff |
user_data: improve tracking set vs passed in user data
Say we have strncpy(dest, src, 5) and src is user_data then dest is user
data at the end as well. But it's not the same as copy_from_user() where
dest is always set to user_data.
I have tried to differentiate between the two before but it was buggy.
This change introduces two states user_data_set and user_data_passed so
we can track this. The is_user_data() now returns 0, 1, or 2 instead of
just 0 or 1.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Say we have strncpy(dest, src, 5) and src is user_data then dest is user
data at the end as well. But it's not the same as copy_from_user() where
dest is always set to user_data.
I have tried to differentiate between the two before but it was buggy.
This change introduces two states user_data_set and user_data_passed so
we can track this. The is_user_data() now returns 0, 1, or 2 instead of
just 0 or 1.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>