From: Yang Shi <yang.shi@linux.alibaba.com>
To: dan.j.williams@intel.com, akpm@linux-foundation.org
Cc: yang.shi@linux.alibaba.com, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: [PATCH] mm: dax: add comment for PFN_SPECIAL
Date: Fri, 28 Sep 2018 03:38:09 +0800 [thread overview]
Message-ID: <1538077089-14550-1-git-send-email-yang.shi@linux.alibaba.com> (raw)
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
*/
#define PFN_FLAGS_MASK (((u64) ~PAGE_MASK) << (BITS_PER_LONG_LONG - PAGE_SHIFT))
#define PFN_SG_CHAIN (1ULL << (BITS_PER_LONG_LONG - 1))
--
1.8.3.1
next reply other threads:[~2018-09-27 19:38 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-27 19:38 Yang Shi [this message]
2018-09-27 21:08 ` [PATCH] mm: dax: add comment for PFN_SPECIAL Dan Williams
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