[PATCH] mm: update comments for get/set_pfnblock_flags_mask

[Qiang Huang <h.huangqiang@huawei.com>]

These two functions changed many times, and comments are out of data
for a long time. Though it's minor, better update it.

Signed-off-by: Qiang Huang <h.huangqiang@huawei.com>
---
 mm/page_alloc.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 4f59fa2..8221366 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -6034,10 +6034,11 @@ static inline int pfn_to_bitidx(struct zone *zone, unsigned long pfn)
 }

 /**
- * get_pageblock_flags_group - Return the requested group of flags for the pageblock_nr_pages block of pages
+ * get_pfnblock_flags_mask - Return the requested group of flags for the pageblock_nr_pages block of pages
  * @page: The page within the block of interest
- * @start_bitidx: The first bit of interest to retrieve
+ * @pfn: Page Number of the page
  * @end_bitidx: The last bit of interest
+ * @mask: The mask for flags
  * returns pageblock_bits flags
  */
 unsigned long get_pfnblock_flags_mask(struct page *page, unsigned long pfn,
@@ -6063,9 +6064,10 @@ unsigned long get_pfnblock_flags_mask(struct page *page, unsigned long pfn,
 /**
  * set_pfnblock_flags_mask - Set the requested group of flags for a pageblock_nr_pages block of pages
  * @page: The page within the block of interest
- * @start_bitidx: The first bit of interest
- * @end_bitidx: The last bit of interest
  * @flags: The flags to set
+ * @pfn: Page Number of the page
+ * @end_bitidx: The last bit of interest
+ * @mask: The mask for flags
  */
 void set_pfnblock_flags_mask(struct page *page, unsigned long flags,
 					unsigned long pfn,
-- 
1.8.3

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