From 07fee7aba5472d0e65345146a68b4bd1a8b656c3 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 3 Mar 2022 14:19:02 +0300 Subject: bcache: use bvec_kmap_local in bio_csum Using local kmaps slightly reduces the chances to stray writes, and the bvec interface cleans up the code a little bit. Signed-off-by: Christoph Hellwig Reviewed-by: Ira Weiny Link: https://lore.kernel.org/r/20220303111905.321089-8-hch@lst.de Signed-off-by: Jens Axboe --- drivers/md/bcache/request.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/md') diff --git a/drivers/md/bcache/request.c b/drivers/md/bcache/request.c index 6869e010475a..fdd0194f84dd 100644 --- a/drivers/md/bcache/request.c +++ b/drivers/md/bcache/request.c @@ -44,10 +44,10 @@ static void bio_csum(struct bio *bio, struct bkey *k) uint64_t csum = 0; bio_for_each_segment(bv, bio, iter) { - void *d = kmap(bv.bv_page) + bv.bv_offset; + void *d = bvec_kmap_local(&bv); csum = crc64_be(csum, d, bv.bv_len); - kunmap(bv.bv_page); + kunmap_local(d); } k->ptr[KEY_PTRS(k)] = csum & (~0ULL >> 1); -- cgit