From: Wei Yang <richard.weiyang@linux.alibaba.com>
To: mgorman@suse.de, akpm@linux-foundation.org,
richard.weiyang@linux.alibaba.com
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: [PATCH 2/4] mm/page_alloc.c: extract the common part in pfn_to_bitidx()
Date: Tue, 23 Jun 2020 20:41:59 +0800 [thread overview]
Message-ID: <20200623124201.8199-2-richard.weiyang@linux.alibaba.com> (raw)
In-Reply-To: <20200623124201.8199-1-richard.weiyang@linux.alibaba.com>
The return value calculation is the same both for SPARSEMEM or not.
Just took it out.
Signed-off-by: Wei Yang <richard.weiyang@linux.alibaba.com>
---
mm/page_alloc.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 727751219003..efc2c355ac52 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -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;
}
/**
--
2.20.1 (Apple Git-117)
next prev parent reply other threads:[~2020-06-23 12:42 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-23 12:41 [PATCH 1/4] mm/page_alloc.c: replace the definition of NR_MIGRATETYPE_BITS with PB_migratetype_bits Wei Yang
2020-06-23 12:41 ` Wei Yang [this message]
2020-06-23 12:42 ` [PATCH 3/4] mm/page_alloc.c: simplify pageblock bitmap access Wei Yang
2020-06-23 12:42 ` [PATCH 4/4] mm/page_alloc.c: remove unnecessary end_bitidx for [set|get]_pfnblock_flags_mask() Wei Yang
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