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| H A D | hmm.c | diff e709accc7670a07b2e5186449f0640c2416662ec Wed Jul 24 08:52:58 CEST 2019 Jason Gunthorpe <jgg@mellanox.com> mm/hmm: comment on VM_FAULT_RETRY semantics in handle_mm_fault
The magic dropping of mmap_sem when handle_mm_fault returns VM_FAULT_RETRY
is rather subtile. Add a comment explaining it.
Link: https://lore.kernel.org/r/20190724065258.16603-8-hch@lst.de
Tested-by: Ralph Campbell <rcampbell@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
[hch: wrote a changelog]
Signed-off-by: Christoph Hellwig <hch@lst.de>
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