diff options
Diffstat (limited to 'block')
| -rw-r--r-- | block/blk.h | 13 | ||||
| -rw-r--r-- | block/genhd.c | 4 | ||||
| -rw-r--r-- | block/ioctl.c | 2 |
3 files changed, 11 insertions, 8 deletions
diff --git a/block/blk.h b/block/blk.h index b998a7761faf..17e03656ba9a 100644 --- a/block/blk.h +++ b/block/blk.h @@ -689,6 +689,7 @@ static inline int req_ref_read(struct request *req) static inline u64 blk_time_get_ns(void) { struct blk_plug *plug = current->plug; + u64 now; if (!plug || !in_task()) return ktime_get_ns(); @@ -697,12 +698,18 @@ static inline u64 blk_time_get_ns(void) * 0 could very well be a valid time, but rather than flag "this is * a valid timestamp" separately, just accept that we'll do an extra * ktime_get_ns() if we just happen to get 0 as the current time. + * + * cur_ktime can be zeroed by pre-emption the moment PF_BLOCK_TS is set. */ - if (!plug->cur_ktime) { - plug->cur_ktime = ktime_get_ns(); + now = READ_ONCE(plug->cur_ktime); + if (!now) { + now = ktime_get_ns(); + WRITE_ONCE(plug->cur_ktime, now); + /* Ensure PF_BLOCK_TS is set after cur_ktime. */ + barrier(); current->flags |= PF_BLOCK_TS; } - return plug->cur_ktime; + return now; } static inline ktime_t blk_time_get(void) diff --git a/block/genhd.c b/block/genhd.c index 7d6854fd28e9..0da6cdf3d5fb 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -407,10 +407,6 @@ static void add_disk_final(struct gendisk *disk) struct device *ddev = disk_to_dev(disk); if (!(disk->flags & GENHD_FL_HIDDEN)) { - /* Make sure the first partition scan will be proceed */ - if (get_capacity(disk) && disk_has_partscan(disk)) - set_bit(GD_NEED_PART_SCAN, &disk->state); - bdev_add(disk->part0, ddev->devt); if (get_capacity(disk)) disk_scan_partitions(disk, BLK_OPEN_READ); diff --git a/block/ioctl.c b/block/ioctl.c index ab2c9ed79946..3d4ea1537457 100644 --- a/block/ioctl.c +++ b/block/ioctl.c @@ -951,7 +951,7 @@ int blkdev_uring_cmd(struct io_uring_cmd *cmd, unsigned int issue_flags) u32 cmd_op = cmd->cmd_op; /* Read what we need from the SQE on the first issue */ - if (!(issue_flags & IORING_URING_CMD_REISSUE)) { + if (!(cmd->flags & IORING_URING_CMD_REISSUE)) { const struct io_uring_sqe *sqe = cmd->sqe; if (unlikely(sqe->ioprio || sqe->__pad1 || sqe->len || |