md: raid10: avoid direct access to bvec table in handle_reshape_read_error (2d06e3b7) · Commits · 戴 / test

All reshape I/O share pages from 1st copy device, so just use that pages for avoiding direct access to bvec table in handle_reshape_read_error. Signed-off-by:

Ming Lei <tom.leiming@gmail.com> Signed-off-by:

Shaohua Li <shli@fb.com>

drivers/md/raid10.c

+5 −2

Original line number	Diff line number	Diff line
		@@ -4653,7 +4653,10 @@ static int handle_reshape_read_error(struct mddev *mddev,
		struct r10bio *r10b = &on_stack.r10_bio;
		int slot = 0;
		int idx = 0;
		struct bio_vec *bvec = r10_bio->master_bio->bi_io_vec;
		struct page **pages;

		/* reshape IOs share pages from .devs[0].bio */
		pages = get_resync_pages(r10_bio->devs[0].bio)->pages;

		r10b->sector = r10_bio->sector;
		__raid10_find_phys(&conf->prev, r10b);
		@@ -4682,7 +4685,7 @@ static int handle_reshape_read_error(struct mddev *mddev,
		success = sync_page_io(rdev,
		addr,
		s << 9,
		bvec[idx].bv_page,
		pages[idx],
		REQ_OP_READ, 0, false);
		rdev_dec_pending(rdev, mddev);
		rcu_read_lock();

Admin message