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bcache: clean up do_btree_node_write a bit 

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 <willy@infradead.org>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Acked-by: Coly Li <colyli@suse.de>
Reviewed-by: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2019-04-25 09:02:59 +02:00 committed by Jens Axboe
parent cdca22bcbc
commit f936b06ae5
1 changed files with 5 additions and 4 deletions
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9
drivers/md/bcache/btree.c
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@ -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);