[PATCH 0/4] eliminate SECTOR related magic numbers and duplicated conversions

From: Zhen Lei
Date: Tue May 05 2020 - 07:56:11 EST


When I studied the code of mm/swap, I found "1 << (PAGE_SHIFT - 9)" appears
many times. So I try to clean up it.

1. Replace "1 << (PAGE_SHIFT - 9)" or similar with SECTORS_PER_PAGE
2. Replace "PAGE_SHIFT - 9" with SECTORS_PER_PAGE_SHIFT
3. Replace "9" with SECTOR_SHIFT
4. Replace "512" with SECTOR_SIZE

No functional change.

Zhen Lei (4):
block: Move SECTORS_PER_PAGE and SECTORS_PER_PAGE_SHIFT definitions
into <linux/blkdev.h>
mm/swap: use SECTORS_PER_PAGE_SHIFT to clean up code
block: use SECTORS_PER_PAGE_SHIFT and SECTORS_PER_PAGE to clean up
code
mtd: eliminate SECTOR related magic numbers

block/blk-settings.c | 8 ++++----
block/partitions/core.c | 4 ++--
drivers/block/zram/zram_drv.h | 2 --
drivers/md/dm-table.c | 2 +-
drivers/md/raid1.c | 4 ++--
drivers/md/raid10.c | 10 +++++-----
drivers/md/raid5-cache.c | 10 +++++-----
include/linux/blkdev.h | 10 ++++++++--
mm/page_io.c | 4 ++--
mm/swapfile.c | 12 ++++++------
10 files changed, 35 insertions(+), 31 deletions(-)

--
2.26.0.106.g9fadedd