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| author | Jens Axboe <axboe@kernel.dk> | 2023-04-14 07:32:02 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2023-04-16 13:01:42 -0600 |
| commit | 9f4107b07b17b5ee68af680150f91227bea2df6f (patch) | |
| tree | 54f7074442e4411c2770e09724b288422b95d2e6 /block/bdev.c | |
| parent | 3838c406a594f15600ad6f83c1e3b16bfd1829d0 (diff) | |
| download | linux-stable-9f4107b07b17b5ee68af680150f91227bea2df6f.tar.gz linux-stable-9f4107b07b17b5ee68af680150f91227bea2df6f.tar.bz2 linux-stable-9f4107b07b17b5ee68af680150f91227bea2df6f.zip | |
block: store bdev->bd_disk->fops->submit_bio state in bdev
We have a long chain of memory dereferencing just to whether or not
this disk has a special submit_bio helper. As that's not necessarily
the common case, add a bd_has_submit_bio state in the bdev to avoid
traversing this memory dependency chain if we don't need to.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/bdev.c')
| -rw-r--r-- | block/bdev.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/block/bdev.c b/block/bdev.c index 1795c7d4b99e..850852fe4b78 100644 --- a/block/bdev.c +++ b/block/bdev.c @@ -419,6 +419,7 @@ struct block_device *bdev_alloc(struct gendisk *disk, u8 partno) bdev->bd_inode = inode; bdev->bd_queue = disk->queue; bdev->bd_stats = alloc_percpu(struct disk_stats); + bdev->bd_has_submit_bio = false; if (!bdev->bd_stats) { iput(inode); return NULL; |