On 2019/4/25 3:02 下午, Christoph Hellwig wrote: > Use a variable containing the buffer address instead of the to be > removed integer iterator from bio_for_each_segment_all. > > Suggested-by: Matthew Wilcox <[email protected]> > Signed-off-by: Christoph Hellwig <[email protected]>
Acked-by: Coly Li <[email protected]> Thanks. Coly Li > --- > drivers/md/bcache/btree.c | 9 +++++---- > 1 file changed, 5 insertions(+), 4 deletions(-) > > diff --git a/drivers/md/bcache/btree.c b/drivers/md/bcache/btree.c > index b139858b0802..3a9f8ed437de 100644 > --- a/drivers/md/bcache/btree.c > +++ b/drivers/md/bcache/btree.c > @@ -431,12 +431,13 @@ static void do_btree_node_write(struct btree *b) > if (!bch_bio_alloc_pages(b->bio, __GFP_NOWARN|GFP_NOWAIT)) { > int j; > struct bio_vec *bv; > - void *base = (void *) ((unsigned long) i & ~(PAGE_SIZE - 1)); > + void *addr = (void *) ((unsigned long) i & ~(PAGE_SIZE - 1)); > struct bvec_iter_all iter_all; > > - bio_for_each_segment_all(bv, b->bio, j, iter_all) > - memcpy(page_address(bv->bv_page), > - base + j * PAGE_SIZE, PAGE_SIZE); > + bio_for_each_segment_all(bv, b->bio, j, iter_all) { > + memcpy(page_address(bv->bv_page), addr, PAGE_SIZE); > + addr += PAGE_SIZE; > + } > > bch_submit_bbio(b->bio, b->c, &k.key, 0); > > -- Coly Li
