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| author |   Jérôme Glisse <jglisse@redhat.com> | 2018-04-10 16:28:46 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2018-04-11 10:28:30 -0700 |
| commit | 5504ed29692faad06ea74c4275e96a8ffc83a1e1 (patch) | |
| tree | fc5b15aa9076aeedd248c339b442ca7ad5c372e7 /include/linux/hmm.h | |
| parent | mm/hmm: cleanup special vma handling (VM_SPECIAL) (diff) | |
| download | linux-dev-5504ed29692faad06ea74c4275e96a8ffc83a1e1.tar.xz linux-dev-5504ed29692faad06ea74c4275e96a8ffc83a1e1.zip | |
mm/hmm: do not differentiate between empty entry or missing directory
There is no point in differentiating between a range for which there is
not even a directory (and thus entries) and empty entry (pte_none() or
pmd_none() returns true).
Simply drop the distinction ie remove HMM_PFN_EMPTY flag and merge now
duplicate hmm_vma_walk_hole() and hmm_vma_walk_clear() functions.
Link: http://lkml.kernel.org/r/20180323005527.758-11-jglisse@redhat.com
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
Cc: Evgeny Baskakov <ebaskakov@nvidia.com>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: Mark Hairgrove <mhairgrove@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/hmm.h')
| -rw-r--r-- | include/linux/hmm.h | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/include/linux/hmm.h b/include/linux/hmm.h index 54d684fe3b90..cf283db22106 100644 --- a/include/linux/hmm.h +++ b/include/linux/hmm.h @@ -84,7 +84,6 @@ struct hmm; * HMM_PFN_VALID: pfn is valid. It has, at least, read permission. * HMM_PFN_WRITE: CPU page table has write permission set * HMM_PFN_ERROR: corresponding CPU page table entry points to poisoned memory - * HMM_PFN_EMPTY: corresponding CPU page table entry is pte_none() * HMM_PFN_SPECIAL: corresponding CPU page table entry is special; i.e., the * result of vm_insert_pfn() or vm_insert_page(). Therefore, it should not * be mirrored by a device, because the entry will never have HMM_PFN_VALID @@ -94,10 +93,9 @@ struct hmm; #define HMM_PFN_VALID (1 << 0) #define HMM_PFN_WRITE (1 << 1) #define HMM_PFN_ERROR (1 << 2) -#define HMM_PFN_EMPTY (1 << 3) -#define HMM_PFN_SPECIAL (1 << 4) -#define HMM_PFN_DEVICE_UNADDRESSABLE (1 << 5) -#define HMM_PFN_SHIFT 6 +#define HMM_PFN_SPECIAL (1 << 3) +#define HMM_PFN_DEVICE_UNADDRESSABLE (1 << 4) +#define HMM_PFN_SHIFT 5 /* * hmm_pfn_to_page() - return struct page pointed to by a valid HMM pfn |