block: set FOLL_PCI_P2PDMA in __bio_iov_iter_get_pages()

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When a bio's queue supports PCI P2PDMA, set FOLL_PCI_P2PDMA for
iov_iter_get_pages_flags(). This allows PCI P2PDMA pages to be passed
from userspace and enables the O_DIRECT path in iomap based filesystems
and direct to block devices.

Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Link: https://lore.kernel.org/r/20221021174116.7200-7-logang@deltatee.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Logan Gunthorpe 2022-10-21 11:41:13 -06:00 • committed by Jens Axboe

parent 1567b49d1a

commit 5e3e3f2e15

1 changed files with 7 additions and 2 deletions

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block/bio.c

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