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mm/hmm: improve and rename hmm_vma_get_pfns() to hmm_range_snapshot()

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Rename for consistency between code, comments and documentation.  Also
improves the comments on all the possible returns values.  Improve the
function by returning the number of populated entries in pfns array.

Link: http://lkml.kernel.org/r/20190403193318.16478-5-jglisse@redhat.com
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Reviewed-by: Ralph Campbell <rcampbell@nvidia.com>
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Balbir Singh <bsingharora@gmail.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Souptick Joarder <jrdr.linux@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jérôme Glisse
2019-05-13 17:19:55 -07:00
committed by Linus Torvalds
parent 9f454612f6
commit 25f23a0c71
3 changed files with 37 additions and 24 deletions
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4
include/linux/hmm.h
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@@ -365,11 +365,11 @@ void hmm_mirror_unregister(struct hmm_mirror *mirror);
* table invalidation serializes on it.
*
* YOU MUST CALL hmm_vma_range_done() ONCE AND ONLY ONCE EACH TIME YOU CALL
* hmm_vma_get_pfns() WITHOUT ERROR !
* hmm_range_snapshot() WITHOUT ERROR !
*
* IF YOU DO NOT FOLLOW THE ABOVE RULE THE SNAPSHOT CONTENT MIGHT BE INVALID !
*/
int hmm_vma_get_pfns(struct hmm_range *range);
long hmm_range_snapshot(struct hmm_range *range);
bool hmm_vma_range_done(struct hmm_range *range);