page_is_pfmemalloc() is used mostly by networking drivers to test if a page can be considered for reusing/recycling. It doesn't write anything to the struct page itself, so its sole argument can be constified, as well as the first argument of skb_propagate_pfmemalloc(). In Page Pool core code, it can be simply inlined instead. Most of the callers from NIC drivers were just doppelgangers of the same condition tests. Derive them into a new common function do deduplicate the code. Since v1 [0]: - new: reduce code duplication by introducing a new common function to test if a page can be reused/recycled (David Rientjes); - collect autographs for Page Pool bits (Jesper Dangaard Brouer, Ilias Apalodimas). [0] https://lore.kernel.org/netdev/20210125164612.243838-1-alobakin@xxxxx Alexander Lobakin (4): mm: constify page_is_pfmemalloc() argument skbuff: constify skb_propagate_pfmemalloc() "page" argument net: introduce common dev_page_is_reserved() net: page_pool: simplify page recycling condition tests .../net/ethernet/hisilicon/hns3/hns3_enet.c | 10 ++-------- drivers/net/ethernet/intel/fm10k/fm10k_main.c | 9 ++------- drivers/net/ethernet/intel/i40e/i40e_txrx.c | 15 +-------------- drivers/net/ethernet/intel/iavf/iavf_txrx.c | 15 +-------------- drivers/net/ethernet/intel/ice/ice_txrx.c | 11 +---------- drivers/net/ethernet/intel/igb/igb_main.c | 7 +------ drivers/net/ethernet/intel/igc/igc_main.c | 7 +------ drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 7 +------ .../net/ethernet/intel/ixgbevf/ixgbevf_main.c | 7 +------ .../net/ethernet/mellanox/mlx5/core/en_rx.c | 7 +------ include/linux/mm.h | 2 +- include/linux/skbuff.h | 19 +++++++++++++++++-- net/core/page_pool.c | 14 ++++---------- 13 files changed, 34 insertions(+), 96 deletions(-) -- 2.30.0
