[PATCH 09/21] block: unexport read_dev_sector and put_dev_sector

Christoph Hellwig
2020-03-24T07:47:43Z

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>
---
block/partition-generic.c | 31 +++++++++++++++++++------------
block/partitions/check.h | 14 +++++++-------
include/linux/blkdev.h | 9 ---------
3 files changed, 26 insertions(+), 28 deletions(-)

diff --git a/block/partition-generic.c b/block/partition-generic.c
index f2004f3bd6f7..fef6bacb2bbb 100644
--- a/block/partition-generic.c
+++ b/block/partition-generic.c
@@ -484,22 +484,29 @@ int blk_add_partitions(struct gendisk *disk, struct block_device *bdev)
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);
diff --git a/block/partitions/check.h b/block/partitions/check.h
index 6042f769471a..0fcf80117887 100644
--- a/block/partitions/check.h
+++ b/block/partitions/check.h
@@ -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
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index f629d40c645c..53a1325efbc3 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -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);

--
2.25.1