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block: unexport read_dev_sector and put_dev_sector

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read_dev_sector and put_dev_sector are now only used by the partition
parsing code.  Remove the export for read_dev_sector and merge it into
the only caller.  Clean the mess up a bit by using goto labels and
the SECTOR_SHIFT constant.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2020-03-24 08:25:18 +01:00 committed by Jens Axboe
parent a10183d744
commit 1a9fba3a77
3 changed files with 26 additions and 28 deletions
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31
block/partition-generic.c
View File

@ -484,22 +484,29 @@ out_free_state:
return ret;
}
unsigned char *read_dev_sector(struct block_device *bdev, sector_t n, Sector *p)
void *read_part_sector(struct parsed_partitions *state, sector_t n, Sector *p)
{
struct address_space *mapping = bdev->bd_inode->i_mapping;
struct address_space *mapping = state->bdev->bd_inode->i_mapping;
struct page *page;
page = read_mapping_page(mapping, (pgoff_t)(n >> (PAGE_SHIFT-9)), NULL);
if (!IS_ERR(page)) {
if (PageError(page))
goto fail;
p->v = page;
return (unsigned char *)page_address(page) + ((n & ((1 << (PAGE_SHIFT - 9)) - 1)) << 9);
fail:
put_page(page);
if (n >= get_capacity(state->bdev->bd_disk)) {
state->access_beyond_eod = true;
return NULL;
}
page = read_mapping_page(mapping,
(pgoff_t)(n >> (PAGE_SHIFT - 9)), NULL);
if (IS_ERR(page))
goto out;
if (PageError(page))
goto out_put_page;
p->v = page;
return (unsigned char *)page_address(page) +
((n & ((1 << (PAGE_SHIFT - 9)) - 1)) << SECTOR_SHIFT);
out_put_page:
put_page(page);
out:
p->v = NULL;
return NULL;
}
EXPORT_SYMBOL(read_dev_sector);

14
block/partitions/check.h
View File

@ -28,14 +28,14 @@ void free_partitions(struct parsed_partitions *state);
struct parsed_partitions *
check_partition(struct gendisk *, struct block_device *);
static inline void *read_part_sector(struct parsed_partitions *state,
sector_t n, Sector *p)
typedef struct {
struct page *v;
} Sector;
void *read_part_sector(struct parsed_partitions *state, sector_t n, Sector *p);
static inline void put_dev_sector(Sector p)
{
if (n >= get_capacity(state->bdev->bd_disk)) {
state->access_beyond_eod = true;
return NULL;
}
return read_dev_sector(state->bdev, n, p);
put_page(p.v);
}
static inline void

9
include/linux/blkdev.h
View File

@ -1484,15 +1484,6 @@ static inline unsigned int block_size(struct block_device *bdev)
return bdev->bd_block_size;
}
typedef struct {struct page *v;} Sector;
unsigned char *read_dev_sector(struct block_device *, sector_t, Sector *);
static inline void put_dev_sector(Sector p)
{
put_page(p.v);
}
int kblockd_schedule_work(struct work_struct *work);
int kblockd_mod_delayed_work_on(int cpu, struct delayed_work *dwork, unsigned long delay);