This came up in discussions when reviewing drm patches.
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
future extensions is going right down the gutters since someone will submit
an ioctl struct with random stack garbage in the yet unused parts. Which
then bakes in the ABI that those fields can never be used for anything else
- but garbage.
+ but garbage. This is also the reason why you must explicitly pad all
+ structures, even if you never use them in an array - the padding the compiler
+ might insert could contain garbage.
* Have simple testcases for all of the above.