| Message ID | 20200507075100.1779-1-thunder.leizhen@huawei.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | clean up SECTOR related macros and sectors/pages conversions | expand |
Hi, all: It seems no one take care about these patches. But I think patch 1 is need. And the main discussion points of others is whether we should add sectors_to_npage()/npage_to_sectors() or keep PAGE_SECTORS_SHIFT. And which marco name do we prefer: PAGE_SECTORS vs SECTORS_PER_PAGE, PAGE_SECTORS_SHIFT vs SECTORS_PER_PAGE_SHIFT. Hi, Jens Axboe, Coly Li, Kent Overstreet,Alasdair Kergon. Mike Snitzer: Can you take a look at patch 1? On 2020/5/7 15:50, Zhen Lei wrote: > v1 --> v2: > As Matthew Wilcox's suggestion, add sectors_to_npage()/npage_to_sectors() > helpers to eliminate SECTORS_PER_PAGE_SHIFT, because it's quite hard to read. > In further, I also eliminated PAGE_SECTORS_SHIFT. > > I tried to eliminate all magic number "9" and "512", but it's too many, maybe > no one want to review it, so I gave up. In the process of searching, I found > the existing macro PAGE_SECTORS, it's equivalent to SECTORS_PER_PAGE. Because > PAGE_SECTORS was defined in include/linux/device-mapper.h, and SECTORS_PER_PAGE > was defined in drivers/block/zram/zram_drv.h, so I discarded SECTORS_PER_PAGE, > althrough I prefer it so much. > > v1: > 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 > > Zhen Lei (10): > block: move PAGE_SECTORS definition into <linux/blkdev.h> > zram: abolish macro SECTORS_PER_PAGE > block: add sectors_to_npage()/npage_to_sectors() helpers > zram: abolish macro SECTORS_PER_PAGE_SHIFT > block: abolish macro PAGE_SECTORS_SHIFT > mm/swap: use npage_to_sectors() and PAGE_SECTORS to clean up code > block: use sectors_to_npage() and PAGE_SECTORS to clean up code > md: use sectors_to_npage() and npage_to_sectors() to clean up code > md: use existing definition RESYNC_SECTORS > md: use PAGE_SECTORS to clean up code > > block/blk-settings.c | 6 +++--- > block/partitions/core.c | 5 ++--- > drivers/block/brd.c | 7 ++----- > drivers/block/null_blk_main.c | 10 ++++------ > drivers/block/zram/zram_drv.c | 8 ++++---- > drivers/block/zram/zram_drv.h | 2 -- > drivers/md/bcache/util.h | 2 -- > drivers/md/dm-kcopyd.c | 2 +- > drivers/md/dm-table.c | 2 +- > drivers/md/md-bitmap.c | 16 ++++++++-------- > drivers/md/md.c | 6 +++--- > drivers/md/raid1.c | 10 +++++----- > drivers/md/raid10.c | 28 ++++++++++++++-------------- > drivers/md/raid5-cache.c | 11 +++++------ > drivers/md/raid5.c | 4 ++-- > include/linux/blkdev.h | 7 +++++-- > include/linux/device-mapper.h | 1 - > mm/page_io.c | 4 ++-- > mm/swapfile.c | 12 ++++++------ > 19 files changed, 67 insertions(+), 76 deletions(-) >