[PATCH net-next 0/3] Fix late DMA unmap crash for page pool

["Toke Høiland-Jørgensen" <toke@redhat.com>]

This series fixes the late dma_unmap crash for page pool first reported
by Yonglong Liu in [0]. It is an alternative approach to the one
submitted by Yunsheng Lin, most recently in [1]. The first two commits
are small refactors of the page pool code, in preparation of the main
change in patch 3. See the commit message of patch 3 for the details.

-Toke

[0] https://lore.kernel.org/lkml/8067f204-1380-4d37-8ffd-007fc6f26738@kernel.org/T/
[1] https://lore.kernel.org/r/20250307092356.638242-1-linyunsheng@huawei.com

Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
---
Toke Høiland-Jørgensen (3):
      page_pool: Move pp_magic check into helper functions
      page_pool: Turn dma_sync and dma_sync_cpu fields into a bitmap
      page_pool: Track DMA-mapped pages and unmap them when destroying the pool

 drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c |  4 +-
 include/net/page_pool/helpers.h                  |  6 +-
 include/net/page_pool/types.h                    | 54 +++++++++++++++-
 mm/page_alloc.c                                  |  9 +--
 net/core/devmem.c                                |  3 +-
 net/core/netmem_priv.h                           | 33 +++++++++-
 net/core/page_pool.c                             | 81 ++++++++++++++++++++----
 net/core/skbuff.c                                | 16 +----
 net/core/xdp.c                                   |  4 +-
 9 files changed, 164 insertions(+), 46 deletions(-)
---
base-commit: 8ef890df4031121a94407c84659125cbccd3fdbe
change-id: 20250310-page-pool-track-dma-0332343a460e