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authorJérôme Glisse <jglisse@redhat.com>2019-05-14 03:19:58 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2019-05-14 19:47:48 +0300
commit73231612dc7c907bd96880a4086ee55eef6b6888 (patch)
tree2ac729baa37d66a450a71bfe2c039153807f0bfb /Documentation/vm/hmm.rst
parent25f23a0c7127b65c4d8200ccda8a352ad5ce1e1d (diff)
downloadlinux-73231612dc7c907bd96880a4086ee55eef6b6888.tar.xz
mm/hmm: improve and rename hmm_vma_fault() to hmm_range_fault()
Minor optimization around hmm_pte_need_fault(). 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/20190403193318.16478-6-jglisse@redhat.com Signed-off-by: Jérôme Glisse <jglisse@redhat.com> Reviewed-by: Ralph Campbell <rcampbell@nvidia.com> Cc: John Hubbard <jhubbard@nvidia.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: Ira Weiny <ira.weiny@intel.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>
Diffstat (limited to 'Documentation/vm/hmm.rst')
-rw-r--r--Documentation/vm/hmm.rst8
1 files changed, 1 insertions, 7 deletions
diff --git a/Documentation/vm/hmm.rst b/Documentation/vm/hmm.rst
index d9b27bdadd1b..61f073215a8d 100644
--- a/Documentation/vm/hmm.rst
+++ b/Documentation/vm/hmm.rst
@@ -190,13 +190,7 @@ When the device driver wants to populate a range of virtual addresses, it can
use either::
long hmm_range_snapshot(struct hmm_range *range);
- int hmm_vma_fault(struct vm_area_struct *vma,
- struct hmm_range *range,
- unsigned long start,
- unsigned long end,
- hmm_pfn_t *pfns,
- bool write,
- bool block);
+ long hmm_range_fault(struct hmm_range *range, bool block);
The first one (hmm_range_snapshot()) will only fetch present CPU page table
entries and will not trigger a page fault on missing or non-present entries.