+ mm-page_allocc-extract-the-common-part-in-pfn_to_bitidx.patch added to -mm tree

[akpm@linux-foundation.org]

The patch titled
     Subject: mm/page_alloc.c: extract the common part in pfn_to_bitidx()
has been added to the -mm tree.  Its filename is
     mm-page_allocc-extract-the-common-part-in-pfn_to_bitidx.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/mm-page_allocc-extract-the-common-part-in-pfn_to_bitidx.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/mm-page_allocc-extract-the-common-part-in-pfn_to_bitidx.patch

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------------------------------------------------------
From: Wei Yang <richard.weiyang@linux.alibaba.com>
Subject: mm/page_alloc.c: extract the common part in pfn_to_bitidx()

The return value calculation is the same both for SPARSEMEM or not.

Just take it out.

Link: http://lkml.kernel.org/r/20200623124201.8199-2-richard.weiyang@linux.alibaba.com
Signed-off-by: Wei Yang <richard.weiyang@linux.alibaba.com>
Cc: Mel Gorman <mgorman@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/page_alloc.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/mm/page_alloc.c~mm-page_allocc-extract-the-common-part-in-pfn_to_bitidx
+++ a/mm/page_alloc.c
@@ -462,11 +462,10 @@ static inline int pfn_to_bitidx(struct p
 {
 #ifdef CONFIG_SPARSEMEM
 	pfn &= (PAGES_PER_SECTION-1);
-	return (pfn >> pageblock_order) * NR_PAGEBLOCK_BITS;
 #else
 	pfn = pfn - round_down(page_zone(page)->zone_start_pfn, pageblock_nr_pages);
-	return (pfn >> pageblock_order) * NR_PAGEBLOCK_BITS;
 #endif /* CONFIG_SPARSEMEM */
+	return (pfn >> pageblock_order) * NR_PAGEBLOCK_BITS;
 }
 
 /**
_

Patches currently in -mm which might be from richard.weiyang@linux.alibaba.com are

mm-page_allocc-replace-the-definition-of-nr_migratetype_bits-with-pb_migratetype_bits.patch
mm-page_allocc-extract-the-common-part-in-pfn_to_bitidx.patch
mm-page_allocc-simplify-pageblock-bitmap-access.patch
mm-page_allocc-remove-unnecessary-end_bitidx-for-_pfnblock_flags_mask.patch