[PATCH v4 03/13] btrfs: use btrfs_crc32c{,_final}() in for free space cache

[Johannes Thumshirn]

The CRC checksum in the free space cache is not dependant on the super
block's csum_type field but always a CRC32C.

So use btrfs_crc32c() and btrfs_crc32c_final() instead of btrfs_csum_data()
and btrfs_csum_final() for computing these checksums.

Signed-off-by: Johannes Thumshirn <jthumsh...@suse.de>
Reviewed-by: Nikolay Borisov <nbori...@suse.com>
---
 fs/btrfs/free-space-cache.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index f74dc259307b..26ed8ed60722 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -465,9 +465,8 @@ static void io_ctl_set_crc(struct btrfs_io_ctl *io_ctl, int 
index)
        if (index == 0)
                offset = sizeof(u32) * io_ctl->num_pages;
 
-       crc = btrfs_csum_data(io_ctl->orig + offset, crc,
-                             PAGE_SIZE - offset);
-       btrfs_csum_final(crc, (u8 *)&crc);
+       crc = btrfs_crc32c(crc, io_ctl->orig + offset, PAGE_SIZE - offset);
+       btrfs_crc32c_final(crc, (u8 *)&crc);
        io_ctl_unmap_page(io_ctl);
        tmp = page_address(io_ctl->pages[0]);
        tmp += index;
@@ -493,9 +492,8 @@ static int io_ctl_check_crc(struct btrfs_io_ctl *io_ctl, 
int index)
        val = *tmp;
 
        io_ctl_map_page(io_ctl, 0);
-       crc = btrfs_csum_data(io_ctl->orig + offset, crc,
-                             PAGE_SIZE - offset);
-       btrfs_csum_final(crc, (u8 *)&crc);
+       crc = btrfs_crc32c(crc, io_ctl->orig + offset, PAGE_SIZE - offset);
+       btrfs_crc32c_final(crc, (u8 *)&crc);
        if (val != crc) {
                btrfs_err_rl(io_ctl->fs_info,
                        "csum mismatch on free space cache");
-- 
2.16.4