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mm/hmm: merge hmm_range_snapshot into hmm_range_fault

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Add a HMM_FAULT_SNAPSHOT flag so that hmm_range_snapshot can be merged
into the almost identical hmm_range_fault function.

Link: https://lore.kernel.org/r/20190726005650.2566-5-rcampbell@nvidia.com
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ralph Campbell <rcampbell@nvidia.com>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Christoph Hellwig
2019-07-25 17:56:47 -07:00
committed by Jason Gunthorpe
parent 9a4903e49e
commit d45d464b11
3 changed files with 13 additions and 93 deletions
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4
include/linux/hmm.h
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@@ -413,7 +413,9 @@ void hmm_range_unregister(struct hmm_range *range);
*/
#define HMM_FAULT_ALLOW_RETRY (1 << 0)
long hmm_range_snapshot(struct hmm_range *range);
/* Don't fault in missing PTEs, just snapshot the current state. */
#define HMM_FAULT_SNAPSHOT (1 << 1)
long hmm_range_fault(struct hmm_range *range, unsigned int flags);
long hmm_range_dma_map(struct hmm_range *range,