在 2025/04/21 15:26, Christoph Hellwig 写道:
Use the proper helper to kmap a bvec in brd_do_bvec instead of directly
accessing the bvec fields and use the deprecated kmap_atomic API.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
drivers/block/brd.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
LGTM
Reviewed-by: Yu Kuai <yukuai3@xxxxxxxxxx>
diff --git a/drivers/block/brd.c b/drivers/block/brd.c
index 91eb50126355..0c70d29379f1 100644
--- a/drivers/block/brd.c
+++ b/drivers/block/brd.c
@@ -207,15 +207,15 @@ static int brd_rw_bvec(struct brd_device *brd, struct bio_vec *bv,
return err;
}
- mem = kmap_atomic(bv->bv_page);
+ mem = bvec_kmap_local(bv);
if (!op_is_write(opf)) {
- copy_from_brd(mem + bv->bv_offset, brd, sector, bv->bv_len);
+ copy_from_brd(mem, brd, sector, bv->bv_len);
flush_dcache_page(bv->bv_page);
} else {
flush_dcache_page(bv->bv_page);
- copy_to_brd(brd, mem + bv->bv_offset, sector, bv->bv_len);
+ copy_to_brd(brd, mem, sector, bv->bv_len);
}
- kunmap_atomic(mem);
+ kunmap_local(mem);
return 0;
}
