btrfs: use clear_page where appropriate

There's a helper to clear whole page, with a arch-specific optimized
code. The replaced cases do not seem to be in performace critical code,
but we still might get some percent gain.

Signed-off-by: David Sterba <dsterba@suse.com>

2 files changed, 2 insertions, 2 deletions

diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index da6841efac26..c5e6180cdb8c 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -355,7 +355,7 @@ static void io_ctl_map_page(struct btrfs_io_ctl *io_ctl, int clear)
         io_ctl->orig = io_ctl->cur;
         io_ctl->size = PAGE_SIZE;
         if (clear)
-                memset(io_ctl->cur, 0, PAGE_SIZE);
+                clear_page(io_ctl->cur);
 }
 
 static void io_ctl_drop_pages(struct btrfs_io_ctl *io_ctl)
diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c
index c4d1e60e831e..48dd6f170c36 100644
--- a/fs/btrfs/scrub.c
+++ b/fs/btrfs/scrub.c
@@ -1643,7 +1643,7 @@ static int scrub_write_page_to_dev_replace(struct scrub_block *sblock,
         if (spage->io_error) {
                 void *mapped_buffer = kmap_atomic(spage->page);
 
-                memset(mapped_buffer, 0, PAGE_SIZE);
+                clear_page(mapped_buffer);
                 flush_dcache_page(spage->page);
                 kunmap_atomic(mapped_buffer);
         }