Messages in this thread | | | From | Alexander Lobakin <> | Subject | [PATCH net-next v2 0/3] compiler_types: add Endianness-dependent __counted_by_{le,be} | Date | Wed, 27 Mar 2024 15:22:38 +0100 |
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Some structures contain flexible arrays at the end and the counter for them, but the counter has explicit Endianness and thus __counted_by() can't be used directly.
To increase test coverage for potential problems without breaking anything, introduce __counted_by_{le,be} defined depending on platform's Endianness to either __counted_by() when applicable or noop otherwise. The first user will be virtchnl2.h from idpf just as example with 9 flex structures having Little Endian counters.
Maybe it would be a good idea to introduce such attributes on compiler level if possible, but for now let's stop on what we have.
Alexander Lobakin (3): compiler_types: add Endianness-dependent __counted_by_{le,be} idpf: make virtchnl2.h self-contained idpf: sprinkle __counted_by{,_le}() in the virtchnl2 header
Documentation/conf.py | 2 ++ scripts/kernel-doc | 1 + include/linux/compiler_types.h | 11 ++++++++++ drivers/net/ethernet/intel/idpf/idpf_txrx.h | 2 ++ drivers/net/ethernet/intel/idpf/virtchnl2.h | 24 ++++++++++----------- 5 files changed, 28 insertions(+), 12 deletions(-)
--- From v1[0]: * fix compilation of #2 (Jakub); * pick Acked-bys (Gustavo).
From RFC[1]:
* teach kdoc new attributes (Simon, Kees); * add Acked-by (Kees); * fix a couple typos; * send to net-next (Kees).
[0] https://lore.kernel.org/netdev/20240326164116.645718-1-aleksander.lobakin@intel.com [1] https://lore.kernel.org/netdev/20240318130354.2713265-1-aleksander.lobakin@intel.com -- 2.44.0
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