[Intel-wired-lan] [RFC net-next v4 0/7] introduce DEFINE_FLEX() macro
Przemek Kitszel
przemyslaw.kitszel at intel.com
Mon Sep 4 12:31:00 UTC 2023
Add DEFINE_FLEX() macro, that helps on-stack allocation of structures
with trailing flex array member.
Expose __struct_size() macro which reads size of data allocated
by DEFINE_FLEX().
Accompany new macros introduction with actual usage,
in the ice driver - hence targeting for netdev tree
- please me know if it is best approach here?
Obvious benefits include simpler resulting code, less heap usage,
less error checking. Less obvious is the fact that compiler has
more room to optimize, and as a whole, even with more stuff on the stack,
we end up with overall better (smaller) report from bloat-o-meter:
add/remove: 8/6 grow/shrink: 7/18 up/down: 2211/-2270 (-59)
(individual results in each patch).
v4: _Static_assert() to ensure compiletime const count param
v3: tidy up 1st patch
v2: Kees: reusing __struct_size() instead of doubling it as a new macro
Przemek Kitszel (7):
overflow: add DEFINE_FLEX() for on-stack allocs
ice: ice_sched_remove_elems: replace 1 elem array param by u32
ice: drop two params of ice_aq_move_sched_elems()
ice: make use of DEFINE_FLEX() in ice_ddp.c
ice: make use of DEFINE_FLEX() for struct ice_aqc_add_tx_qgrp
ice: make use of DEFINE_FLEX() for struct ice_aqc_dis_txq_item
ice: make use of DEFINE_FLEX() in ice_switch.c
drivers/net/ethernet/intel/ice/ice_common.c | 20 ++-----
drivers/net/ethernet/intel/ice/ice_ddp.c | 39 ++++---------
drivers/net/ethernet/intel/ice/ice_lag.c | 48 ++++------------
drivers/net/ethernet/intel/ice/ice_lib.c | 23 ++------
drivers/net/ethernet/intel/ice/ice_sched.c | 56 ++++++------------
drivers/net/ethernet/intel/ice/ice_sched.h | 6 +-
drivers/net/ethernet/intel/ice/ice_switch.c | 63 +++++----------------
drivers/net/ethernet/intel/ice/ice_xsk.c | 22 +++----
include/linux/compiler_types.h | 32 +++++++----
include/linux/fortify-string.h | 4 --
include/linux/overflow.h | 35 ++++++++++++
11 files changed, 130 insertions(+), 218 deletions(-)
base-commit: bd6c11bc43c496cddfc6cf603b5d45365606dbd5
--
2.40.1
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