diff options
| author |   Jérôme Glisse <jglisse@redhat.com> | 2019-05-13 17:19:48 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2019-05-14 09:47:48 -0700 |
| commit | 704f3f2cf63cdb76925ac2ff432182c73574b20b (patch) | |
| tree | fd38bccd21f1604fd0cdaccce17794a18a3c9e93 /include | |
| parent | mm/hmm: select mmu notifier when selecting HMM (diff) | |
| download | linux-dev-704f3f2cf63cdb76925ac2ff432182c73574b20b.tar.xz linux-dev-704f3f2cf63cdb76925ac2ff432182c73574b20b.zip | |
mm/hmm: use reference counting for HMM struct
Every time I read the code to check that the HMM structure does not vanish
before it should thanks to the many lock protecting its removal i get a
headache. Switch to reference counting instead it is much easier to
follow and harder to break. This also remove some code that is no longer
needed with refcounting.
Link: http://lkml.kernel.org/r/20190403193318.16478-3-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 'include')
| -rw-r--r-- | include/linux/hmm.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/hmm.h b/include/linux/hmm.h index ad50b7b4f141..716fc61fa6d4 100644 --- a/include/linux/hmm.h +++ b/include/linux/hmm.h @@ -131,6 +131,7 @@ enum hmm_pfn_value_e { /* * struct hmm_range - track invalidation lock on virtual address range * + * @hmm: the core HMM structure this range is active against * @vma: the vm area struct for the range * @list: all range lock are on a list * @start: range virtual start address (inclusive) @@ -142,6 +143,7 @@ enum hmm_pfn_value_e { * @valid: pfns array did not change since it has been fill by an HMM function */ struct hmm_range { + struct hmm *hmm; struct vm_area_struct *vma; struct list_head list; unsigned long start; |