From: Zhen Lei <thunder.leizhen@huawei.com>
To: Minchan Kim <minchan@kernel.org>, Nitin Gupta <ngupta@vflare.org>,
"Sergey Senozhatsky" <sergey.senozhatsky.work@gmail.com>,
Matthew Wilcox <willy@infradead.org>,
Jens Axboe <axboe@kernel.dk>, Coly Li <colyli@suse.de>,
Kent Overstreet <kent.overstreet@gmail.com>,
"Alasdair Kergon" <agk@redhat.com>,
Mike Snitzer <snitzer@redhat.com>,
linux-block <linux-block@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
linux-mm <linux-mm@kvack.org>, dm-devel <dm-devel@redhat.com>,
Song Liu <song@kernel.org>,
linux-raid <linux-raid@vger.kernel.org>,
linux-kernel <linux-kernel@vger.kernel.org>
Cc: Zhen Lei <thunder.leizhen@huawei.com>
Subject: [PATCH v2 03/10] block: add sectors_to_npage()/npage_to_sectors() helpers
Date: Thu, 7 May 2020 15:50:53 +0800 [thread overview]
Message-ID: <20200507075100.1779-4-thunder.leizhen@huawei.com> (raw)
In-Reply-To: <20200507075100.1779-1-thunder.leizhen@huawei.com>
Provide the conversion of "number of sectors"/"sector number" and
"number of pages"/"page number".
Suggested-by: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
---
include/linux/blkdev.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 934f31fc15cd..5d8daaffc38b 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -910,6 +910,8 @@ static inline struct request_queue *bdev_get_queue(struct block_device *bdev)
#define SECTOR_SIZE (1 << SECTOR_SHIFT)
#endif
#define PAGE_SECTORS (PAGE_SIZE / SECTOR_SIZE)
+#define sectors_to_npage(nr) ((nr) / PAGE_SECTORS)
+#define npage_to_sectors(nr) ((nr) * PAGE_SECTORS)
/*
* blk_rq_pos() : the current sector
--
2.26.0.106.g9fadedd
next prev parent reply other threads:[~2020-05-07 7:56 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-07 7:50 [PATCH v2 00/10] clean up SECTOR related macros and sectors/pages conversions Zhen Lei
2020-05-07 7:50 ` [PATCH v2 01/10] block: move PAGE_SECTORS definition into <linux/blkdev.h> Zhen Lei
2020-05-07 7:50 ` [PATCH v2 02/10] zram: abolish macro SECTORS_PER_PAGE Zhen Lei
2020-05-07 7:50 ` Zhen Lei [this message]
2020-05-07 7:50 ` [PATCH v2 04/10] zram: abolish macro SECTORS_PER_PAGE_SHIFT Zhen Lei
2020-05-07 7:50 ` [PATCH v2 05/10] block: abolish macro PAGE_SECTORS_SHIFT Zhen Lei
2020-05-07 7:50 ` [PATCH v2 06/10] mm/swap: use npage_to_sectors() and PAGE_SECTORS to clean up code Zhen Lei
2020-05-15 4:06 ` Matthew Wilcox
2020-05-15 6:28 ` Leizhen (ThunderTown)
2020-05-15 4:14 ` Matthew Wilcox
2020-05-15 6:42 ` Leizhen (ThunderTown)
2020-05-07 7:50 ` [PATCH v2 07/10] block: use sectors_to_npage() " Zhen Lei
2020-05-15 4:19 ` Matthew Wilcox
2020-05-15 6:52 ` Leizhen (ThunderTown)
2020-05-07 7:50 ` [PATCH v2 08/10] md: use sectors_to_npage() and npage_to_sectors() " Zhen Lei
2020-05-07 7:50 ` [PATCH v2 09/10] md: use existing definition RESYNC_SECTORS Zhen Lei
2020-05-07 7:51 ` [PATCH v2 10/10] md: use PAGE_SECTORS to clean up code Zhen Lei
2020-05-15 2:05 ` [PATCH v2 00/10] clean up SECTOR related macros and sectors/pages conversions Leizhen (ThunderTown)
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