The patch titled
Subject: mm: dax: add comment for PFN_SPECIAL
has been added to the -mm tree. Its filename is
mm-dax-add-comment-for-pfn_special.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-dax-add-comment-for-pfn_special.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-dax-add-comment-for-pfn_special.patch
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------------------------------------------------------
From: Yang Shi <yang.shi@xxxxxxxxxxxxxxxxx>
Subject: mm: dax: add comment for PFN_SPECIAL
The comment for PFN_SPECIAL is missed in pfn_t.h. Add comment to get
consistent with other pfn flags.
Link: http://lkml.kernel.org/r/1538086549-100536-1-git-send-email-yang.shi@xxxxxxxxxxxxxxxxx
Signed-off-by: Yang Shi <yang.shi@xxxxxxxxxxxxxxxxx>
Suggested-by: Dan Williams <dan.j.williams@xxxxxxxxx>
Reviewed-by: Dan Williams <dan.j.williams@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/pfn_t.h | 2 ++
1 file changed, 2 insertions(+)
--- a/include/linux/pfn_t.h~mm-dax-add-comment-for-pfn_special
+++ a/include/linux/pfn_t.h
@@ -9,6 +9,8 @@
* 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 - for CONFIG_FS_DAX_LIMITED builds to allow XIP, but not
+ * get_user_pages
*/
#define PFN_FLAGS_MASK (((u64) ~PAGE_MASK) << (BITS_PER_LONG_LONG - PAGE_SHIFT))
#define PFN_SG_CHAIN (1ULL << (BITS_PER_LONG_LONG - 1))
_
Patches currently in -mm which might be from yang.shi@xxxxxxxxxxxxxxxxx are
mm-mmap-zap-pages-with-read-mmap_sem-in-munmap.patch
mm-unmap-vm_hugetlb-mappings-with-optimized-path.patch
mm-unmap-vm_pfnmap-mappings-with-optimized-path.patch
mm-mremap-downgrade-mmap_sem-to-read-when-shrinking.patch
mm-brk-downgrade-mmap_sem-to-read-when-shrinking.patch
mm-dax-add-comment-for-pfn_special.patch
