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Date: Wed, 4 Mar 2020 16:34:36 +0100
From: Ulf Hansson <ulf.hansson@...aro.org>
To: Matteo Croce <mcroce@...hat.com>
Cc: linux-block <linux-block@...r.kernel.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
linux-nvdimm@...ts.01.org, linux-bcache@...r.kernel.org,
linux-raid@...r.kernel.org,
"linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
xen-devel@...ts.xenproject.org,
linux-scsi <linux-scsi@...r.kernel.org>,
linux-nfs@...r.kernel.org, Jens Axboe <axboe@...nel.dk>,
"James E.J. Bottomley" <jejb@...ux.ibm.com>,
Anna Schumaker <anna.schumaker@...app.com>
Subject: Re: [PATCH] block: refactor duplicated macros
On Sun, 23 Feb 2020 at 17:57, Matteo Croce <mcroce@...hat.com> wrote:
>
> The macros PAGE_SECTORS, PAGE_SECTORS_SHIFT and SECTOR_MASK are defined
> several times in different flavours across the whole tree.
> Define them just once in a common header.
>
> Signed-off-by: Matteo Croce <mcroce@...hat.com>
For mmc:
Acked-by: Ulf Hansson <ulf.hansson@...aro.org>
Kind regards
Uffe
> ---
> block/blk-lib.c | 2 +-
> drivers/block/brd.c | 3 ---
> drivers/block/null_blk_main.c | 4 ----
> drivers/block/zram/zram_drv.c | 8 ++++----
> drivers/block/zram/zram_drv.h | 2 --
> drivers/dax/super.c | 2 +-
> drivers/md/bcache/util.h | 2 --
> drivers/md/dm-bufio.c | 6 +++---
> drivers/md/dm-integrity.c | 10 +++++-----
> drivers/md/md.c | 4 ++--
> drivers/md/raid1.c | 2 +-
> drivers/mmc/core/host.c | 3 ++-
> drivers/scsi/xen-scsifront.c | 4 ++--
> fs/iomap/buffered-io.c | 2 +-
> fs/nfs/blocklayout/blocklayout.h | 2 --
> include/linux/blkdev.h | 4 ++++
> include/linux/device-mapper.h | 1 -
> 17 files changed, 26 insertions(+), 35 deletions(-)
>
> diff --git a/block/blk-lib.c b/block/blk-lib.c
> index 5f2c429d4378..f5e705d307e0 100644
> --- a/block/blk-lib.c
> +++ b/block/blk-lib.c
> @@ -260,7 +260,7 @@ static int __blkdev_issue_write_zeroes(struct block_device *bdev,
> */
> static unsigned int __blkdev_sectors_to_bio_pages(sector_t nr_sects)
> {
> - sector_t pages = DIV_ROUND_UP_SECTOR_T(nr_sects, PAGE_SIZE / 512);
> + sector_t pages = DIV_ROUND_UP_SECTOR_T(nr_sects, PAGE_SECTORS);
>
> return min(pages, (sector_t)BIO_MAX_PAGES);
> }
> diff --git a/drivers/block/brd.c b/drivers/block/brd.c
> index 220c5e18aba0..33e2cbe11400 100644
> --- a/drivers/block/brd.c
> +++ b/drivers/block/brd.c
> @@ -25,9 +25,6 @@
>
> #include <linux/uaccess.h>
>
> -#define PAGE_SECTORS_SHIFT (PAGE_SHIFT - SECTOR_SHIFT)
> -#define PAGE_SECTORS (1 << PAGE_SECTORS_SHIFT)
> -
> /*
> * Each block ramdisk device has a radix_tree brd_pages of pages that stores
> * the pages containing the block device's contents. A brd page's ->index is
> diff --git a/drivers/block/null_blk_main.c b/drivers/block/null_blk_main.c
> index 16510795e377..c42af6cf0b97 100644
> --- a/drivers/block/null_blk_main.c
> +++ b/drivers/block/null_blk_main.c
> @@ -11,10 +11,6 @@
> #include <linux/init.h>
> #include "null_blk.h"
>
> -#define PAGE_SECTORS_SHIFT (PAGE_SHIFT - SECTOR_SHIFT)
> -#define PAGE_SECTORS (1 << PAGE_SECTORS_SHIFT)
> -#define SECTOR_MASK (PAGE_SECTORS - 1)
> -
> #define FREE_BATCH 16
>
> #define TICKS_PER_SEC 50ULL
> diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
> index 1bdb5793842b..6ee59da4a6e2 100644
> --- a/drivers/block/zram/zram_drv.c
> +++ b/drivers/block/zram/zram_drv.c
> @@ -1548,9 +1548,9 @@ static void __zram_make_request(struct zram *zram, struct bio *bio)
> struct bio_vec bvec;
> struct bvec_iter iter;
>
> - index = bio->bi_iter.bi_sector >> SECTORS_PER_PAGE_SHIFT;
> + index = bio->bi_iter.bi_sector >> PAGE_SECTORS_SHIFT;
> offset = (bio->bi_iter.bi_sector &
> - (SECTORS_PER_PAGE - 1)) << SECTOR_SHIFT;
> + SECTOR_MASK) << SECTOR_SHIFT;
>
> switch (bio_op(bio)) {
> case REQ_OP_DISCARD:
> @@ -1643,8 +1643,8 @@ static int zram_rw_page(struct block_device *bdev, sector_t sector,
> goto out;
> }
>
> - index = sector >> SECTORS_PER_PAGE_SHIFT;
> - offset = (sector & (SECTORS_PER_PAGE - 1)) << SECTOR_SHIFT;
> + index = sector >> PAGE_SECTORS_SHIFT;
> + offset = (sector & SECTOR_MASK) << SECTOR_SHIFT;
>
> bv.bv_page = page;
> bv.bv_len = PAGE_SIZE;
> diff --git a/drivers/block/zram/zram_drv.h b/drivers/block/zram/zram_drv.h
> index f2fd46daa760..12309175d55e 100644
> --- a/drivers/block/zram/zram_drv.h
> +++ b/drivers/block/zram/zram_drv.h
> @@ -21,8 +21,6 @@
>
> #include "zcomp.h"
>
> -#define SECTORS_PER_PAGE_SHIFT (PAGE_SHIFT - SECTOR_SHIFT)
> -#define SECTORS_PER_PAGE (1 << SECTORS_PER_PAGE_SHIFT)
> #define ZRAM_LOGICAL_BLOCK_SHIFT 12
> #define ZRAM_LOGICAL_BLOCK_SIZE (1 << ZRAM_LOGICAL_BLOCK_SHIFT)
> #define ZRAM_SECTOR_PER_LOGICAL_BLOCK \
> diff --git a/drivers/dax/super.c b/drivers/dax/super.c
> index 0aa4b6bc5101..7f7672f72085 100644
> --- a/drivers/dax/super.c
> +++ b/drivers/dax/super.c
> @@ -92,7 +92,7 @@ bool __generic_fsdax_supported(struct dax_device *dax_dev,
> return false;
> }
>
> - last_page = PFN_DOWN((start + sectors - 1) * 512) * PAGE_SIZE / 512;
> + last_page = PFN_DOWN((start + sectors - 1) * 512) * PAGE_SECTORS;
> err = bdev_dax_pgoff(bdev, last_page, PAGE_SIZE, &pgoff_end);
> if (err) {
> pr_debug("%s: error: unaligned partition for dax\n",
> diff --git a/drivers/md/bcache/util.h b/drivers/md/bcache/util.h
> index c029f7443190..55196e0f37c3 100644
> --- a/drivers/md/bcache/util.h
> +++ b/drivers/md/bcache/util.h
> @@ -15,8 +15,6 @@
>
> #include "closure.h"
>
> -#define PAGE_SECTORS (PAGE_SIZE / 512)
> -
> struct closure;
>
> #ifdef CONFIG_BCACHE_DEBUG
> diff --git a/drivers/md/dm-bufio.c b/drivers/md/dm-bufio.c
> index 2d519c223562..f4496ce0d598 100644
> --- a/drivers/md/dm-bufio.c
> +++ b/drivers/md/dm-bufio.c
> @@ -384,7 +384,7 @@ static void *alloc_buffer_data(struct dm_bufio_client *c, gfp_t gfp_mask,
> gfp_mask & __GFP_NORETRY) {
> *data_mode = DATA_MODE_GET_FREE_PAGES;
> return (void *)__get_free_pages(gfp_mask,
> - c->sectors_per_block_bits - (PAGE_SHIFT - SECTOR_SHIFT));
> + c->sectors_per_block_bits - PAGE_SECTORS_SHIFT);
> }
>
> *data_mode = DATA_MODE_VMALLOC;
> @@ -422,7 +422,7 @@ static void free_buffer_data(struct dm_bufio_client *c,
>
> case DATA_MODE_GET_FREE_PAGES:
> free_pages((unsigned long)data,
> - c->sectors_per_block_bits - (PAGE_SHIFT - SECTOR_SHIFT));
> + c->sectors_per_block_bits - PAGE_SECTORS_SHIFT);
> break;
>
> case DATA_MODE_VMALLOC:
> @@ -597,7 +597,7 @@ static void use_bio(struct dm_buffer *b, int rw, sector_t sector,
> unsigned vec_size, len;
>
> vec_size = b->c->block_size >> PAGE_SHIFT;
> - if (unlikely(b->c->sectors_per_block_bits < PAGE_SHIFT - SECTOR_SHIFT))
> + if (unlikely(b->c->sectors_per_block_bits < PAGE_SECTORS_SHIFT))
> vec_size += 2;
>
> bio = bio_kmalloc(GFP_NOWAIT | __GFP_NORETRY | __GFP_NOWARN, vec_size);
> diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c
> index b225b3e445fa..4e60cda465cc 100644
> --- a/drivers/md/dm-integrity.c
> +++ b/drivers/md/dm-integrity.c
> @@ -652,7 +652,7 @@ static void page_list_location(struct dm_integrity_c *ic, unsigned section, unsi
>
> sector = section * ic->journal_section_sectors + offset;
>
> - *pl_index = sector >> (PAGE_SHIFT - SECTOR_SHIFT);
> + *pl_index = sector >> PAGE_SECTORS_SHIFT;
> *pl_offset = (sector << SECTOR_SHIFT) & (PAGE_SIZE - 1);
> }
>
> @@ -951,7 +951,7 @@ static void rw_journal_sectors(struct dm_integrity_c *ic, int op, int op_flags,
> return;
> }
>
> - pl_index = sector >> (PAGE_SHIFT - SECTOR_SHIFT);
> + pl_index = sector >> PAGE_SECTORS_SHIFT;
> pl_offset = (sector << SECTOR_SHIFT) & (PAGE_SIZE - 1);
>
> io_req.bi_op = op;
> @@ -1072,7 +1072,7 @@ static void copy_from_journal(struct dm_integrity_c *ic, unsigned section, unsig
>
> sector = section * ic->journal_section_sectors + JOURNAL_BLOCK_SECTORS + offset;
>
> - pl_index = sector >> (PAGE_SHIFT - SECTOR_SHIFT);
> + pl_index = sector >> PAGE_SECTORS_SHIFT;
> pl_offset = (sector << SECTOR_SHIFT) & (PAGE_SIZE - 1);
>
> io_req.bi_op = REQ_OP_WRITE;
> @@ -3343,7 +3343,7 @@ static int create_journal(struct dm_integrity_c *ic, char **error)
> ic->commit_ids[3] = cpu_to_le64(0x4444444444444444ULL);
>
> journal_pages = roundup((__u64)ic->journal_sections * ic->journal_section_sectors,
> - PAGE_SIZE >> SECTOR_SHIFT) >> (PAGE_SHIFT - SECTOR_SHIFT);
> + PAGE_SIZE >> SECTOR_SHIFT) >> PAGE_SECTORS_SHIFT;
> journal_desc_size = journal_pages * sizeof(struct page_list);
> if (journal_pages >= totalram_pages() - totalhigh_pages() || journal_desc_size > ULONG_MAX) {
> *error = "Journal doesn't fit into memory";
> @@ -4075,7 +4075,7 @@ static int dm_integrity_ctr(struct dm_target *ti, unsigned argc, char **argv)
> spin_lock_init(&bbs->bio_queue_lock);
>
> sector = i * (BITMAP_BLOCK_SIZE >> SECTOR_SHIFT);
> - pl_index = sector >> (PAGE_SHIFT - SECTOR_SHIFT);
> + pl_index = sector >> PAGE_SECTORS_SHIFT;
> pl_offset = (sector << SECTOR_SHIFT) & (PAGE_SIZE - 1);
>
> bbs->bitmap = lowmem_page_address(ic->journal[pl_index].page) + pl_offset;
> diff --git a/drivers/md/md.c b/drivers/md/md.c
> index 469f551863be..b28f9390608f 100644
> --- a/drivers/md/md.c
> +++ b/drivers/md/md.c
> @@ -1734,7 +1734,7 @@ static int super_1_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_
> __le64 *bbp;
> int i;
> int sectors = le16_to_cpu(sb->bblog_size);
> - if (sectors > (PAGE_SIZE / 512))
> + if (sectors > PAGE_SECTORS)
> return -EINVAL;
> offset = le32_to_cpu(sb->bblog_offset);
> if (offset == 0)
> @@ -8733,7 +8733,7 @@ void md_do_sync(struct md_thread *thread)
> /*
> * Tune reconstruction:
> */
> - window = 32 * (PAGE_SIZE / 512);
> + window = 32 * PAGE_SECTORS;
> pr_debug("md: using %dk window, over a total of %lluk.\n",
> window/2, (unsigned long long)max_sectors/2);
>
> diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
> index cd810e195086..37a0b571903a 100644
> --- a/drivers/md/raid1.c
> +++ b/drivers/md/raid1.c
> @@ -2129,7 +2129,7 @@ static void process_checks(struct r1bio *r1_bio)
> int vcnt;
>
> /* Fix variable parts of all bios */
> - vcnt = (r1_bio->sectors + PAGE_SIZE / 512 - 1) >> (PAGE_SHIFT - 9);
> + vcnt = (r1_bio->sectors + PAGE_SECTORS - 1) >> (PAGE_SHIFT - 9);
> for (i = 0; i < conf->raid_disks * 2; i++) {
> blk_status_t status;
> struct bio *b = r1_bio->bios[i];
> diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
> index c8768726d925..4a23fb9d5642 100644
> --- a/drivers/mmc/core/host.c
> +++ b/drivers/mmc/core/host.c
> @@ -18,6 +18,7 @@
> #include <linux/export.h>
> #include <linux/leds.h>
> #include <linux/slab.h>
> +#include <linux/blkdev.h>
>
> #include <linux/mmc/host.h>
> #include <linux/mmc/card.h>
> @@ -427,7 +428,7 @@ struct mmc_host *mmc_alloc_host(int extra, struct device *dev)
>
> host->max_req_size = PAGE_SIZE;
> host->max_blk_size = 512;
> - host->max_blk_count = PAGE_SIZE / 512;
> + host->max_blk_count = PAGE_SECTORS;
>
> host->fixed_drv_type = -EINVAL;
> host->ios.power_delay_ms = 10;
> diff --git a/drivers/scsi/xen-scsifront.c b/drivers/scsi/xen-scsifront.c
> index f0068e96a177..e6b29e54d07a 100644
> --- a/drivers/scsi/xen-scsifront.c
> +++ b/drivers/scsi/xen-scsifront.c
> @@ -852,7 +852,7 @@ static int scsifront_probe(struct xenbus_device *dev,
> host->max_id = VSCSIIF_MAX_TARGET;
> host->max_channel = 0;
> host->max_lun = VSCSIIF_MAX_LUN;
> - host->max_sectors = (host->sg_tablesize - 1) * PAGE_SIZE / 512;
> + host->max_sectors = (host->sg_tablesize - 1) * PAGE_SECTORS;
> host->max_cmd_len = VSCSIIF_MAX_COMMAND_SIZE;
>
> err = scsi_add_host(host, &dev->dev);
> @@ -1073,7 +1073,7 @@ static void scsifront_read_backend_params(struct xenbus_device *dev,
> host->sg_tablesize, nr_segs);
>
> host->sg_tablesize = nr_segs;
> - host->max_sectors = (nr_segs - 1) * PAGE_SIZE / 512;
> + host->max_sectors = (nr_segs - 1) * PAGE_SECTORS;
> }
>
> static void scsifront_backend_changed(struct xenbus_device *dev,
> diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
> index 7c84c4c027c4..60505fc156c5 100644
> --- a/fs/iomap/buffered-io.c
> +++ b/fs/iomap/buffered-io.c
> @@ -29,7 +29,7 @@ struct iomap_page {
> atomic_t read_count;
> atomic_t write_count;
> spinlock_t uptodate_lock;
> - DECLARE_BITMAP(uptodate, PAGE_SIZE / 512);
> + DECLARE_BITMAP(uptodate, PAGE_SECTORS);
> };
>
> static inline struct iomap_page *to_iomap_page(struct page *page)
> diff --git a/fs/nfs/blocklayout/blocklayout.h b/fs/nfs/blocklayout/blocklayout.h
> index 716bc75e9ed2..22407751e0fd 100644
> --- a/fs/nfs/blocklayout/blocklayout.h
> +++ b/fs/nfs/blocklayout/blocklayout.h
> @@ -40,8 +40,6 @@
> #include "../pnfs.h"
> #include "../netns.h"
>
> -#define PAGE_CACHE_SECTORS (PAGE_SIZE >> SECTOR_SHIFT)
> -#define PAGE_CACHE_SECTOR_SHIFT (PAGE_SHIFT - SECTOR_SHIFT)
> #define SECTOR_SIZE (1 << SECTOR_SHIFT)
>
> struct pnfs_block_dev;
> diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
> index 053ea4b51988..b3c9be6906a0 100644
> --- a/include/linux/blkdev.h
> +++ b/include/linux/blkdev.h
> @@ -910,6 +910,10 @@ static inline struct request_queue *bdev_get_queue(struct block_device *bdev)
> #define SECTOR_SIZE (1 << SECTOR_SHIFT)
> #endif
>
> +#define PAGE_SECTORS_SHIFT (PAGE_SHIFT - SECTOR_SHIFT)
> +#define PAGE_SECTORS (1 << PAGE_SECTORS_SHIFT)
> +#define SECTOR_MASK (PAGE_SECTORS - 1)
> +
> /*
> * blk_rq_pos() : the current sector
> * blk_rq_bytes() : bytes left in the entire request
> diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h
> index 475668c69dbc..c98a533f8ffa 100644
> --- a/include/linux/device-mapper.h
> +++ b/include/linux/device-mapper.h
> @@ -141,7 +141,6 @@ typedef long (*dm_dax_direct_access_fn) (struct dm_target *ti, pgoff_t pgoff,
> long nr_pages, void **kaddr, pfn_t *pfn);
> typedef size_t (*dm_dax_copy_iter_fn)(struct dm_target *ti, pgoff_t pgoff,
> void *addr, size_t bytes, struct iov_iter *i);
> -#define PAGE_SECTORS (PAGE_SIZE / 512)
>
> void dm_error(const char *message);
>
> --
> 2.24.1
>
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