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Subject[PATCH v3 net-next 0/5] net: consolidate page_is_pfmemalloc() usage
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 v2 [1]:
- use more intuitive name for the new inline function since there's
nothing "reserved" in remote pages (Jakub Kicinski, John Hubbard);
- fold likely() inside the helper itself to make driver code a bit
fancier (Jakub Kicinski);
- split function introduction and using into two separate commits;
- collect some more tags (Jesse Brandeburg, David Rientjes).

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@pm.me
[1] https://lore.kernel.org/netdev/20210127201031.98544-1-alobakin@pm.me

Alexander Lobakin (5):
mm: constify page_is_pfmemalloc() argument
skbuff: constify skb_propagate_pfmemalloc() "page" argument
net: introduce common dev_page_is_reusable()
net: use the new dev_page_is_reusable() instead of private versions
net: page_pool: simplify page recycling condition tests

.../net/ethernet/hisilicon/hns3/hns3_enet.c | 17 ++++++----------
drivers/net/ethernet/intel/fm10k/fm10k_main.c | 13 ++++--------
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 | 13 ++----------
drivers/net/ethernet/intel/igb/igb_main.c | 9 ++-------
drivers/net/ethernet/intel/igc/igc_main.c | 9 ++-------
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 9 ++-------
.../net/ethernet/intel/ixgbevf/ixgbevf_main.c | 9 ++-------
.../net/ethernet/mellanox/mlx5/core/en_rx.c | 7 +------
include/linux/mm.h | 2 +-
include/linux/skbuff.h | 20 +++++++++++++++++--
net/core/page_pool.c | 14 ++++---------
13 files changed, 46 insertions(+), 106 deletions(-)

--
2.30.0


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