[PATCH v2 03/10] block: add sectors_to_npage()/npage_to_sectors() helpers
From: Zhen Lei <hidden>
Date: 2020-05-07 07:56:41
Also in:
dm-devel, linux-block, linux-mm, lkml
Subsystem:
block layer, the rest · Maintainers:
Jens Axboe, Linus Torvalds
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 <redacted> --- 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
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2.26.0.106.g9fadedd