mm/mmu_notifiers: hoist do_mmu_notifier_register down_write to the caller

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This simplifies the code to not have so many one line functions and extra
logic. __mmu_notifier_register() simply becomes the entry point to
register the notifier, and the other one calls it under lock.

Also add a lockdep_assert to check that the callers are holding the lock
as expected.

Link: https://lore.kernel.org/r/20190806231548.25242-2-jgg@ziepe.ca
Suggested-by: Christoph Hellwig <hch@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ralph Campbell <rcampbell@nvidia.com>
Tested-by: Ralph Campbell <rcampbell@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

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This commit is contained in:

Jason Gunthorpe 2019-08-06 20:15:38 -03:00

parent 9c240a7bb3

commit 56c57103db

1 changed files with 14 additions and 21 deletions

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mm/mmu_notifier.c

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