landlock: Use bit-fields for storing handled layer access masks

When defined using bit-fields, the compiler takes care of packing the
bits in a memory-efficient way and frees us from defining
LANDLOCK_SHIFT_ACCESS_* by hand.  The exact memory layout does not
matter in our use case.

The manual definition of LANDLOCK_SHIFT_ACCESS_* has resulted in bugs in
at least two recent patch sets [1] [2] where new kinds of handled access
rights were introduced.

Cc: Mikhail Ivanov <[email protected]>
Cc: Tahera Fahimi <[email protected]>
Link: https://lore.kernel.org/r/[email protected] [1]
Link: https://lore.kernel.org/r/[email protected] [2]
Signed-off-by: Günther Noack <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mickaël Salaün <[email protected]>

0 files changed, 0 insertions, 0 deletions