f2fs: use cryptoapi crc32 functions

The crc function is done bit by bit.
Optimize this by use cryptoapi
crc32 function which is backed by h/w acceleration.

Signed-off-by: Keith Mok <ek9852@gmail.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

1 files changed, 13 insertions, 0 deletions

diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 7b62016e66cd..15bb81f8dac2 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -590,6 +590,8 @@ static void f2fs_put_super(struct super_block *sb)
         wait_for_completion(&sbi->s_kobj_unregister);
 
         sb->s_fs_info = NULL;
+        if (sbi->s_chksum_driver)
+                crypto_free_shash(sbi->s_chksum_driver);
         kfree(sbi->raw_super);
         kfree(sbi);
 }
@@ -1310,6 +1312,15 @@ try_onemore:
         if (!sbi)
                 return -ENOMEM;
 
+        /* Load the checksum driver */
+        sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0);
+        if (IS_ERR(sbi->s_chksum_driver)) {
+                f2fs_msg(sb, KERN_ERR, "Cannot load crc32 driver.");
+                err = PTR_ERR(sbi->s_chksum_driver);
+                sbi->s_chksum_driver = NULL;
+                goto free_sbi;
+        }
+
         /* set a block size */
         if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
                 f2fs_msg(sb, KERN_ERR, "unable to set blocksize");
@@ -1568,6 +1579,8 @@ free_options:
 free_sb_buf:
         kfree(raw_super);
 free_sbi:
+        if (sbi->s_chksum_driver)
+                crypto_free_shash(sbi->s_chksum_driver);
         kfree(sbi);
 
         /* give only one another chance */