diff options
| author | Dan Williams <[email protected]> | 2018-04-05 16:24:28 -0700 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2018-04-05 21:36:26 -0700 |
| commit | c1d53b92b95c23909de11a97bcc51f26a9509231 (patch) | |
| tree | 69f9c00e092765491b793988d4bf55a6e1854999 | |
| parent | 05ea88608d4e135695571727f5d7f22967d2a3bf (diff) | |
device-dax: implement ->pagesize() for smaps to report MMUPageSize
Given that device-dax is making similar page mapping size guarantees as
hugetlbfs, emit the size in smaps and any other kernel path that
requests the mapping size of a vma.
Link: http://lkml.kernel.org/r/151996255287.27922.18397777516059080245.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <[email protected]>
Reported-by: Jane Chu <[email protected]>
Reviewed-by: Andrew Morton <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Paul Mackerras <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
| -rw-r--r-- | drivers/dax/device.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/dax/device.c b/drivers/dax/device.c index 2137dbc29877..0b61f48f21a6 100644 --- a/drivers/dax/device.c +++ b/drivers/dax/device.c @@ -439,10 +439,20 @@ static int dev_dax_split(struct vm_area_struct *vma, unsigned long addr) return 0; } +static unsigned long dev_dax_pagesize(struct vm_area_struct *vma) +{ + struct file *filp = vma->vm_file; + struct dev_dax *dev_dax = filp->private_data; + struct dax_region *dax_region = dev_dax->region; + + return dax_region->align; +} + static const struct vm_operations_struct dax_vm_ops = { .fault = dev_dax_fault, .huge_fault = dev_dax_huge_fault, .split = dev_dax_split, + .pagesize = dev_dax_pagesize, }; static int dax_mmap(struct file *filp, struct vm_area_struct *vma) |