Commit 399b795b authored Aug 06, 2020 by Wei Yang Committed by Linus Torvalds Aug 07, 2020

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.

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/20200623124201.8199-2-richard.weiyang@linux.alibaba.com


Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent d38ac97f

mm/page_alloc.c

+1 −2

Original line number	Diff line number	Diff line
		@@ -459,11 +459,10 @@ static inline int pfn_to_bitidx(struct page *page, unsigned long pfn)
		{
		#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;
		}

		/**

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