mm/page_alloc.c: remove unnecessary end_bitidx for [set|get]_pfnblock…

…_flags_mask()

After previous cleanup, the end_bitidx is not necessary any more.

Signed-off-by: Wei Yang <richard.weiyang@linux.alibaba.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Mel Gorman <mgorman@suse.de>
Link: http://lkml.kernel.org/r/20200623124201.8199-4-richard.weiyang@linux.alibaba.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

include/linux/mmzone.h

@@ -91,8 +91,7 @@ extern int page_group_by_mobility_disabled;
 #define MIGRATETYPE_MASK ((1UL << PB_migratetype_bits) - 1)
 
 #define get_pageblock_migratetype(page)					\
-	get_pfnblock_flags_mask(page, page_to_pfn(page),		\
-			PB_migrate_end, MIGRATETYPE_MASK)
+	get_pfnblock_flags_mask(page, page_to_pfn(page), MIGRATETYPE_MASK)
 
 struct free_area {
 	struct list_head	free_list[MIGRATE_TYPES];

include/linux/pageblock-flags.h

@@ -56,27 +56,25 @@ struct page;
 
 unsigned long get_pfnblock_flags_mask(struct page *page,
 				unsigned long pfn,
-				unsigned long end_bitidx,
 				unsigned long mask);
 
 void set_pfnblock_flags_mask(struct page *page,
 				unsigned long flags,
 				unsigned long pfn,
-				unsigned long end_bitidx,
 				unsigned long mask);
 
 /* Declarations for getting and setting flags. See mm/page_alloc.c */
 #ifdef CONFIG_COMPACTION
 #define get_pageblock_skip(page) \
 	get_pfnblock_flags_mask(page, page_to_pfn(page),	\
-			PB_migrate_skip, (1 << (PB_migrate_skip)))
+			(1 << (PB_migrate_skip)))
 #define clear_pageblock_skip(page) \
 	set_pfnblock_flags_mask(page, 0, page_to_pfn(page),	\
-			PB_migrate_skip, (1 << PB_migrate_skip))
+			(1 << PB_migrate_skip))
 #define set_pageblock_skip(page) \
 	set_pfnblock_flags_mask(page, (1 << PB_migrate_skip),	\
 			page_to_pfn(page),			\
-			PB_migrate_skip, (1 << PB_migrate_skip))
+			(1 << PB_migrate_skip))
 #else
 static inline bool get_pageblock_skip(struct page *page)
 {

mm/page_alloc.c

@@ -469,14 +469,13 @@ static inline int pfn_to_bitidx(struct page *page, unsigned long pfn)
  * 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
  * @pfn: The target page frame number
- * @end_bitidx: The last bit of interest to retrieve
  * @mask: mask of bits that the caller is interested in
  *
  * Return: pageblock_bits flags
  */
-static __always_inline unsigned long __get_pfnblock_flags_mask(struct page *page,
+static __always_inline
+unsigned long __get_pfnblock_flags_mask(struct page *page,
 					unsigned long pfn,
-					unsigned long end_bitidx,
 					unsigned long mask)
 {
 	unsigned long *bitmap;
@@ -493,28 +492,25 @@ static __always_inline unsigned long __get_pfnblock_flags_mask(struct page *page
 }
 
 unsigned long get_pfnblock_flags_mask(struct page *page, unsigned long pfn,
-					unsigned long end_bitidx,
 					unsigned long mask)
 {
-	return __get_pfnblock_flags_mask(page, pfn, end_bitidx, mask);
+	return __get_pfnblock_flags_mask(page, pfn, mask);
 }
 
 static __always_inline int get_pfnblock_migratetype(struct page *page, unsigned long pfn)
 {
-	return __get_pfnblock_flags_mask(page, pfn, PB_migrate_end, MIGRATETYPE_MASK);
+	return __get_pfnblock_flags_mask(page, pfn, MIGRATETYPE_MASK);
 }
 
 /**
  * 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
  * @flags: The flags to set
  * @pfn: The target page frame number
- * @end_bitidx: The last bit of interest
  * @mask: mask of bits that the caller is interested in
  */
 void set_pfnblock_flags_mask(struct page *page, unsigned long flags,
 					unsigned long pfn,
-					unsigned long end_bitidx,
 					unsigned long mask)
 {
 	unsigned long *bitmap;
@@ -550,8 +546,7 @@ void set_pageblock_migratetype(struct page *page, int migratetype)
 		migratetype = MIGRATE_UNMOVABLE;
 
 	set_pfnblock_flags_mask(page, (unsigned long)migratetype,
-				page_to_pfn(page), PB_migrate_end,
-				MIGRATETYPE_MASK);
+				page_to_pfn(page), MIGRATETYPE_MASK);
 }
 
 #ifdef CONFIG_DEBUG_VM