From 69d2480456d1baf027a86e530989d7bedd698d5f Mon Sep 17 00:00:00 2001 From: David Sterba Date: Fri, 29 Jun 2018 10:56:44 +0200 Subject: [PATCH] btrfs: use copy_page for copying pages instead of memcpy Use the helper that's possibly optimized for full page copies. Signed-off-by: David Sterba --- fs/btrfs/free-space-cache.c | 4 ++-- fs/btrfs/raid56.c | 12 +++++------- 2 files changed, 7 insertions(+), 9 deletions(-) diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c index 354d55f22d99..57e7ab7f5e03 100644 --- a/fs/btrfs/free-space-cache.c +++ b/fs/btrfs/free-space-cache.c @@ -547,7 +547,7 @@ static int io_ctl_add_bitmap(struct btrfs_io_ctl *io_ctl, void *bitmap) io_ctl_map_page(io_ctl, 0); } - memcpy(io_ctl->cur, bitmap, PAGE_SIZE); + copy_page(io_ctl->cur, bitmap); io_ctl_set_crc(io_ctl, io_ctl->index - 1); if (io_ctl->index < io_ctl->num_pages) io_ctl_map_page(io_ctl, 0); @@ -607,7 +607,7 @@ static int io_ctl_read_bitmap(struct btrfs_io_ctl *io_ctl, if (ret) return ret; - memcpy(entry->bitmap, io_ctl->cur, PAGE_SIZE); + copy_page(entry->bitmap, io_ctl->cur); io_ctl_unmap_page(io_ctl); return 0; diff --git a/fs/btrfs/raid56.c b/fs/btrfs/raid56.c index 5e4ad134b9ad..27ed47a23f26 100644 --- a/fs/btrfs/raid56.c +++ b/fs/btrfs/raid56.c @@ -260,7 +260,7 @@ static void cache_rbio_pages(struct btrfs_raid_bio *rbio) s = kmap(rbio->bio_pages[i]); d = kmap(rbio->stripe_pages[i]); - memcpy(d, s, PAGE_SIZE); + copy_page(d, s); kunmap(rbio->bio_pages[i]); kunmap(rbio->stripe_pages[i]); @@ -1275,7 +1275,7 @@ static noinline void finish_rmw(struct btrfs_raid_bio *rbio) pointers); } else { /* raid5 */ - memcpy(pointers[nr_data], pointers[0], PAGE_SIZE); + copy_page(pointers[nr_data], pointers[0]); run_xor(pointers + 1, nr_data - 1, PAGE_SIZE); } @@ -1941,9 +1941,7 @@ static void __raid_recover_end_io(struct btrfs_raid_bio *rbio) BUG_ON(failb != -1); pstripe: /* Copy parity block into failed block to start with */ - memcpy(pointers[faila], - pointers[rbio->nr_data], - PAGE_SIZE); + copy_page(pointers[faila], pointers[rbio->nr_data]); /* rearrange the pointer array */ p = pointers[faila]; @@ -2448,7 +2446,7 @@ static noinline void finish_parity_scrub(struct btrfs_raid_bio *rbio, pointers); } else { /* raid5 */ - memcpy(pointers[nr_data], pointers[0], PAGE_SIZE); + copy_page(pointers[nr_data], pointers[0]); run_xor(pointers + 1, nr_data - 1, PAGE_SIZE); } @@ -2456,7 +2454,7 @@ static noinline void finish_parity_scrub(struct btrfs_raid_bio *rbio, p = rbio_stripe_page(rbio, rbio->scrubp, pagenr); parity = kmap(p); if (memcmp(parity, pointers[rbio->scrubp], PAGE_SIZE)) - memcpy(parity, pointers[rbio->scrubp], PAGE_SIZE); + copy_page(parity, pointers[rbio->scrubp]); else /* Parity is right, needn't writeback */ bitmap_clear(rbio->dbitmap, pagenr, 1); -- 2.30.2