[PATCH v2 0/2] vfio: Fix racy bitfields and tighten struct layout

[Alex Williamson <alex.williamson@nvidia.com>]

A recent patch[1] proposed by Raghavendra triggered a Sashiko
review[2] flagging that the proposed new bitfield shares storage
with neighbors and that concurrent updates via RMW may clobber
adjacent fields.

Auditing bitfield users in vfio_pci_core_device finds several
pre-existing fields with the same hazard, and an analogous pattern
in mlx5_vhca_page_tracker / mlx5vf_pci_core_device.  This series
splits all such fields out of their shared storage words, resolving
the existing cases.

v2: Uncouple from Raghavendra's patch so that Sashiko can apply
    and review (new field dropped), we can handle merge on commit.

Thanks,
Alex

[1] https://lore.kernel.org/all/20260504224142.1041477-1-rananta@google.com/
[2] https://sashiko.dev/#/patchset/20260504224142.1041477-1-rananta@google.com

Alex Williamson (2):
  vfio/pci: Fix racy bitfields and tighten struct layout
  vfio/mlx5: Fix racy bitfields and tighten struct layout

 drivers/vfio/pci/mlx5/cmd.h   | 8 ++++----
 include/linux/vfio_pci_core.h | 8 ++++----
 2 files changed, 8 insertions(+), 8 deletions(-)

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2.51.0