drivers/IB,core: reduce scope of mmap_sem

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ib_umem_get() uses gup_longterm() and relies on the lock to stabilze the
vma_list, so we cannot really get rid of mmap_sem altogether, but now that
the counter is atomic, we can get of some complexity that mmap_sem brings
with only pinned_vm.

Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

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Davidlohr Bueso 2019-02-06 09:59:20 -08:00 • committed by Jason Gunthorpe

parent 8ea1f989aa

commit b95df5e3e4

1 changed files with 2 additions and 39 deletions

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41

drivers/infiniband/core/umem.c

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