ich777/linux_media
1
0
Fork 0
mirror of https://github.com/tbsdtv/linux_media.git synced 2025-07-23 12:43:29 +02:00
Code Issues Packages Projects Releases Wiki Activity

block: add a bdev_is_partition helper

Browse Source 
Add a littler helper to make the somewhat arcane bd_contains checks a
little more obvious.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig
2020-09-03 07:40:57 +02:00
committed by Jens Axboe
parent 250eec9e39
commit fa01b1e973
10 changed files with 22 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
include/linux/blkdev.h
View File

@@ -1353,6 +1353,11 @@ static inline int sb_issue_zeroout(struct super_block *sb, sector_t block,
extern int blk_verify_command(unsigned char *cmd, fmode_t mode);
static inline bool bdev_is_partition(struct block_device *bdev)
{
return bdev->bd_partno;
}
enum blk_default_limits {
BLK_MAX_SEGMENTS = 128,
BLK_SAFE_MAX_SECTORS = 255,
@@ -1469,7 +1474,7 @@ static inline int bdev_alignment_offset(struct block_device *bdev)
if (q->limits.misaligned)
return -1;
if (bdev != bdev->bd_contains)
if (bdev_is_partition(bdev))
return queue_limit_alignment_offset(&q->limits,
bdev->bd_part->start_sect);
return q->limits.alignment_offset;
@@ -1510,7 +1515,7 @@ static inline int bdev_discard_alignment(struct block_device *bdev)
{
struct request_queue *q = bdev_get_queue(bdev);
if (bdev != bdev->bd_contains)
if (bdev_is_partition(bdev))
return queue_limit_discard_alignment(&q->limits,
bdev->bd_part->start_sect);
return q->limits.discard_alignment;