mm: allow multiple error returns in try_grab_page()

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In order to add checks for P2PDMA memory into try_grab_page(), expand
the error return from a bool to an int/error code. Update all the
callsites handle change in usage.

Also remove the WARN_ON_ONCE() call at the callsites seeing there
already is a WARN_ON_ONCE() inside the function if it fails.

Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20221021174116.7200-2-logang@deltatee.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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This commit is contained in:

Logan Gunthorpe 2022-10-21 11:41:08 -06:00 • committed by Jens Axboe

parent 5b2560c4c2

commit 0f0892356f

4 changed files with 37 additions and 27 deletions

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2

include/linux/mm.h

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26

mm/gup.c

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19

mm/huge_memory.c

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17

mm/hugetlb.c

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