| Message ID | 1538077089-14550-1-git-send-email-yang.shi@linux.alibaba.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | mm: dax: add comment for PFN_SPECIAL | expand |
On Thu, Sep 27, 2018 at 12:39 PM <yang.shi@linux.alibaba.com> wrote: > > The comment for PFN_SPECIAL is missed in pfn_t.h. Add comment to get > consistent with other pfn flags. > > Cc: Dan Williams <dan.j.williams@intel.com> > Signed-off-by: Yang Shi <yang.shi@linux.alibaba.com> > --- > include/linux/pfn_t.h | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/include/linux/pfn_t.h b/include/linux/pfn_t.h > index 21713dc..d2e5dd4 100644 > --- a/include/linux/pfn_t.h > +++ b/include/linux/pfn_t.h > @@ -9,6 +9,7 @@ > * PFN_SG_LAST - pfn references a page and is the last scatterlist entry > * PFN_DEV - pfn is not covered by system memmap by default > * PFN_MAP - pfn has a dynamic page mapping established by a device driver > + * PFN_SPECIAL - indicates that _PAGE_SPECIAL should be used for DAX ptes That's not quite accurate, I would change this to: PFN_SPECIAL - for CONFIG_FS_DAX_LIMITED builds to allow XIP, but not get_user_pages.
diff --git a/include/linux/pfn_t.h b/include/linux/pfn_t.h index 21713dc..d2e5dd4 100644 --- a/include/linux/pfn_t.h +++ b/include/linux/pfn_t.h @@ -9,6 +9,7 @@ * PFN_SG_LAST - pfn references a page and is the last scatterlist entry * PFN_DEV - pfn is not covered by system memmap by default * PFN_MAP - pfn has a dynamic page mapping established by a device driver + * PFN_SPECIAL - indicates that _PAGE_SPECIAL should be used for DAX ptes */ #define PFN_FLAGS_MASK (((u64) ~PAGE_MASK) << (BITS_PER_LONG_LONG - PAGE_SHIFT)) #define PFN_SG_CHAIN (1ULL << (BITS_PER_LONG_LONG - 1))
The comment for PFN_SPECIAL is missed in pfn_t.h. Add comment to get consistent with other pfn flags. Cc: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Yang Shi <yang.shi@linux.alibaba.com> --- include/linux/pfn_t.h | 1 + 1 file changed, 1 insertion(+)