mm: optimize dev_pagemap reference counting around get_dev_pagemap

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Change the calling convention so that get_dev_pagemap always consumes the
previous reference instead of doing this using an explicit earlier call to
put_dev_pagemap in the callers.

The callers will still need to put the final reference after finishing the
loop over the pages.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

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Christoph Hellwig 2017-12-29 08:54:01 +01:00 • committed by Dan Williams

parent 0822acb86c

commit 832d7aa051

2 changed files with 14 additions and 10 deletions

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17

kernel/memremap.c

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7

mm/gup.c

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